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Communication over free space
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370 - Multiplex communications
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|Class / Patent application number
|Number of patent applications / Date published
|Time division
|Frequency division
|Transmit/receive interaction control
|Duplex repeaters
|MOBILE COMMUNICATION SYSTEM AND METHOD FOR TRANSMITTING/RECEIVING SIGNAL THEREOF - A method of transmitting a signal in a base station is provided. The method includes filtering a signal to be transmitted through a filter, power amplifying the filtered signal to generate nonlinear harmonic components corresponding to a first frequency band and a second frequency band, separating the nonlinear harmonic components according to the first frequency band and the second frequency band such that nonlinear harmonic components corresponding to the first frequency band passes through a first frequency band duplexer and nonlinear harmonic components corresponding to the second frequency band passes through a second frequency band duplexer, and transmitting the separated nonlinear harmonic components.
|FRONT END EMPLOYING PIN DIODE SWITCH WITH HIGH LINEARITY AND LOW LOSS FOR SIMULTANEOUS TRANSMISSION - A method, transceiver integrated circuit (IC), and communications device that employs a PIN Diode switch in connection with a transceiver integrated circuit in order to provide a highly linear path for simultaneously transmitted signals in a multi-band wireless communications device. A high linearity switch (HLS) utility/controller configures the PIN diode switch for switching between dual and single transmission modes. In the dual transmission mode, both a series PIN diode and a shunt PIN diode of the switch are biased to an on-state. A first transceiver generates and simultaneously transmits different transmission signals occupying different frequency bands to at least one antenna by utilizing a highly linear circuit path that includes the series PIN diode. In single transmission mode, both diodes are biased to an off-state which allows a second transceiver to transmit a single transmission signal to at least one antenna via a switch path with a low insertion loss impact.
|METHOD AND ARCHITECTURE FOR PAIRING GUARD BAND FREQUENCIES FOR EFFECTING GSM, CDMA, UMTS & WCDMA SERVICES - A method and architecture for pairing of Guard Band Frequencies in PGSM/EGSM 900 MHz and DCS 1800 MHz Bands, as also in US Cellular Bands and US PCS Bands, for effecting duplexed cellular mobile telecommunication services like I-Den, GSM, PGSM, EGSM, CDMA, CDMA 2000, UMTS & WCDMA & any other duplexed use in the guard bands. The method and architecture- of the present invention/innovation leads to two additional interspersed Bands available for exploitation of mobile cellular telecommunication systems, leading to an inherently additional utilization of spectrum that was unutilized in the Art, leading to a near optimal and efficient utilization of a scarce natural resource like spectrum. Further, this present embodiment leads to a balanced link compared to the embodiment in the Art.
|METHOD, SYSTEM, BASE STATION AND TERMINAL FOR PROCESSING THE REFERENCE SYMBOL - A method, system, base station and terminal for processing the reference symbol can support to transfer the common reference symbol and the user dedicated reference symbol synchronously. In the present invention, the transmitting end configures the reference symbol structure for the downlink sub-frame according to the used antenna number; the transmitting end inserts the common reference symbol and the user dedicated reference symbol which will be transmitted into the downlink sub-frame according to the reference symbol structure and transmits them. The present invention can support to transfer the common reference symbol and the user dedicated reference symbol synchronously.
|METHOD AND DEVICE FOR DETERMINING UPLINK CONTROL CHANNEL RESOURCES - A method and a device for determining uplink control channel resources are disclosed by the embodiments of the present invention. With the technical solutions of the embodiments of the present invention, the uplink control resources, such as the ACK/NACK and the like, can be configured semi-statically. The method is applicable for both the FDD system and the TDD system. The overhead of the uplink feedback channel in the Long Term Evolution (LTE) carrier aggregation system is reduced. Therefore the system performance of the LTE multi-carrier advanced system is improved, and the system is compatible with the LTE Release 8 system well.
|INSERTION LOSS IMPROVEMENT IN A MULTI-BAND DEVICE - A multi-band user equipment (UE) is configured to operate in a single frequency band mode or a multiple frequency band mode. When operating in a single frequency band mode, the UE activates a bypass switch to route uplink signals of a first band around a multiplexer and reduce the insertion loss for the band.
|COMMUNICATION DEVICE FOR SIMULTANEOUS TRANSMISSION BY MULTIPLE TRANSCEIVERS - A communication device reduces intermodulation interference in a simultaneous transmitter using a notch diplexing arrangement. The communication device has a radio front-end module with more than one transceiver for simultaneous transmission with opposing transmit (Tx) band notch filters in series with each duplexer output, and phase rotations into and out of the notch filters suitable for diplexing at the notch filter outputs.
|METHOD AND APPARATUS FOR PERFORMING TRANSMISSION AND RECEPTION SIMULTANEOUSLY IN SAME FREQUENCY BAND - There are provided a method and apparatus for transmitting and receiving signals in the same frequency band at the same time. A signal is received using a dual polarization antenna, the main axis of the polarization of the reception signal is predicted by performing adaptive polarization tracking, and polarization filtering is performed in order to remove interference. A signal is transmitted through a polarization completely orthogonal to the tracked polarization. In accordance with the present invention, in a wireless communication system, signals can be transmitted and received in the same frequency band at the same time.
|Cancellation of RF Second-Order Intermodulation Distortion - The disclosed invention relates to a transceiver system configured to cancel RF second-order intermodulation distortion (IMD2) within a differential reception path. In some embodiments, the transceiver system has one or more common-mode attenuation elements that attenuate common-mode interferer signals within the differential reception path. The common-mode attenuation elements detect a common-mode interferer from one or more nodes within a transceiver system front-end. One or more properties of the detected common-mode interferer are adjusted and then fed into the differential reception path, where the adjusted common-mode signal attenuates the common-mode interferers. In other embodiments, the differential reception path has a tunable amplifying stage. The tunable amplifying stage has first and second amplifier elements that are independently operated to intentionally introduce an operating parameter mismatch between the elements. The intentional mismatch may be tuned to account for different nonlinear responses of the amplifier elements to mitigate IMD2 within the differential reception path.
|COMMUNICATIONS APPARATUS - The present invention provides a communication apparatus canceling a leakage component of the transmission frequency modulated signal superimposed on the input of the receiving circuit. The communication apparatus of the invention includes a transmitting circuit modulating a first baseband signal into a modulated signal by a first scheme, a receiving circuit demodulating a received input signal into a second baseband signal, an antenna duplexer guiding the modulated signal to an antenna and guiding a received signal received by the antenna to the receiving circuit, wherein the received input signal includes the received signal and a leak component of the modulated signal pass through the antenna duplexer, a cancel signal generating circuit generating a canceling signal which cancels the leak component, and a coupler combining the received input signal and the canceling signal, wherein an output signal of the coupler is demodulated at the receiving circuit.
|HALF-DUPLEX/FULL-DUPLEX OPERATION FOR TDD CARRIER AGGREGATION - Aspects of the present disclosure relate to methods for communicating using TDD and carrier aggregation.
|TUNABLE DUPLEXER ARCHITECTURE - A tunable radio frequency (RF) duplexer and duplexing methods are disclosed. The tunable RF duplexer includes a first hybrid coupler, a second hybrid coupler, and an RF filter circuit. The first hybrid coupler is operable to split the RF transmission input signal into first and second RF quadrature hybrid transmission signals (QHTSs). The second hybrid coupler is operable to split the RF receive input signal into first and second RF quadrature hybrid receive signals (QHRSs). The RF filter circuit is operable to pass the first and second RF QHTSs to the second hybrid coupler and to reflect the first and second RF QHRSs back to the second hybrid coupler. Additionally, the second hybrid coupler is configured to combine the first and second RF QHTSs into an RF transmission output signal and to combine the first and second RF QHRSs into an RF receive output signal.
|CARRIER AGGREGATION RADIO SYSTEM - A carrier aggregation radio system is provided. The carrier aggregation radio system includes a transceiver having a main receiver, a diversity receiver and a carrier aggregation receiver. The carrier aggregation radio system further includes a control system adapted to command a radio front end to route diversity signals from a diversity antenna to the main and diversity receivers in a first mode and to command the radio front end to route carrier aggregation signals from the diversity antenna to the carrier aggregation receiver in a second mode. The control system may also command a third mode in which diversity signals are routed to the main and diversity receivers while carrier aggregation signals are routed to the carrier aggregation receiver.
|Full-Duplex Wireless Voice Broadcasting Apparatus with Channel-Changing and Interference-Resistance - The present disclosure is a full-duplex wireless voice broadcasting apparatus. The apparatus is capable of channel-changing. Full-duplex (two-way) voice communication is achieved by using at least one receiving device and an emitting device. The receiving device has good mobility to be used as an emergent caller to the emitting device. The present disclosure has advantages in interference resistance, energy saving, short-distance emergent calling, and calling for help.
|PACKET-BASED INPUT/OUTPUT INTERFACE FOR A CORRELATION ENGINE - A navigation system includes a correlation engine configured to despread a received signal. The correlation engine includes a correlator configured to evaluate the received signal against a replica signal to produce a correlation result, and a packet encoder configured to produce a packet comprising a destination address, a source address, and the correlation result. An input/output interface is configured to provide the packet to another component in the navigation system.
|Method Of Accessing A Wireless Network And A Wireless Device - In one embodiment, this method includes sending, from a terminal, a random access request; and receiving, at the terminal, system information from a base station via a unicast transmission in response to the random access request. The system information includes an identifier, uplink bandwidth information and downlink bandwidth information. The identifier identifies the base station, the uplink bandwidth information indicates a bandwidth to use for uplink transmission, and the downlink bandwidth information indicates a bandwidth used for downlink transmission.
|TECHNIQUES FOR LINK UTILIZATION FOR HALF-DUPLEX AND FULL-DUPLEX STATIONS IN A WIRELESS NETWORK - Various example embodiments are disclosed herein. According to an example embodiment, an apparatus may include a controller, and a wireless transmitter coupled to the controller, the wireless transmitter configured to the wireless transmitter configured to transmit at least a portion of a frame via wireless link to one or more mobile stations in a wireless network, the at least a portion of a frame including: an all-group downlink region directed to group 1 half-duplex (HD) mobile stations, group 2 HD mobile stations, and full-duplex (FD) mobile stations, a group 1 downlink region directed to the group 1 HD mobile stations and the FD mobile stations, and a group 2 downlink region directed to the group 2 HD mobile stations and the FD mobile stations.
|High isolation signal routing assembly for full duplex communication - A signal routing assembly accepts a first transmission signal at an input and outputs a substantial portion of the signal at a common port of the signal routing assembly. A second transmission signal is received at the common port and is routed through the signal routing assembly delivered to output of the signal routing assembly. Leakage signals from routing devices leaking the first transmission signal are terminated inside the signal routing assembly. Leakage signal from a divider/combiner are cancelled by reflect signal from at least one reflector device. A transmitter produces the first transmission signal and the signal routing assembly delivers this signal to the common port of the signal routing assembly. In full duplex operation, second transmission signals received at the common port are routed to the output to be applied to a receiver.
|HIGH-FREQUENCY SWITCH MODULE - A high-frequency switch module includes a first switching element and a second switching element. A common terminal of the first switching element is connected to an antenna. A common input terminal of the second switching element is connected to a multi-band power amplifier. A second individual output terminal of the second switching element is connected to a fourth individual terminal of the first switching element via a first low-pass filter, and is connected to a third individual terminal of the first switching element via a series circuit including a second low-pass filter and a high-pass filter. A first individual output terminal of the second switching element is connected to a first individual terminal of the first switching element via a phase-shift circuit and a first SAW duplexer, and is connected to a second individual terminal of the first switching element via the phase-shift circuit and a second SAW duplexer.
|ADAPTIVE BIASING TO MEET STRINGENT HARMONIC REQUIREMENTS - This disclosure relates to adaptively reducing the peak power of harmonic distortions as a function of the operating conditions for transmission communications. Specifically, the bias of the amplifier is adaptively increased to reduce harmonic distortions when a small fraction of the resource blocks are active.
|DEVICE AND METHOD FOR BIDIRECTIONAL COMMUNICATION - This application relates to an apparatus comprising at least one interface for connecting to a wireless network. Further the apparatus comprises an advertising unit configured to advertise the presence of the apparatus within the wireless network. The apparatus includes also a presenting unit configured to present at least one mobile service described in a markup language and a transmission unit configured for accepting a request for a bidirectional communication via the wireless network from at least one second apparatus using the presented mobile service.
|WIRELESS CIRCUITRY WITH SIMULTANEOUS VOICE AND DATA CAPABILITIES AND REDUCED INTERMODULATION DISTORTION - An electronic device has wireless communications circuitry that includes transmitters and receivers. The transmitters and receivers may share an antenna. Transmitted signals from multiple transmitters may be merged using a combining circuit. Merged signals from the transmitter may be conveyed to the antenna through a circulator. The circulator may route incoming signals from the antenna to receivers. The receivers may be coupled to the circulator through a filter. An additional filter may be interposed between the circulator and the antenna. An additional transmitter may transmit signals through the antenna using the additional filter. An additional receiver may receive some of the incoming signals that are received by the antenna through the additional filter.
|Multi-Band and Multi-Mode Antenna System and Method - An antenna system is disclosed. A wireless device includes two antennas. The first antenna is optimized at a first frequency band. The second antenna is optimized at a second frequency band. The signals received from respective optimized frequency bands are used as primary received signals. The signals having frequencies beyond respective optimized frequency bands are used as diversity signals. Likewise, the signals transmitted from a transceiver to base stations are sent to respective antennas based upon their frequency bands. By employing this optimized antenna configuration, the wireless device can provide high quality wireless signals for both frequency bands.
|CONTACTLESS CONNECTOR - A contactless connector includes a transmitter having a first transmit integrated circuit generating a first signal and a second transmit integrated circuit generating a second signal. A first pick-up antenna is adjacent the first transmit integrated circuit and conveys the first signal along a first transmission line to a first propagation antenna. A second pick-up antenna is adjacent the second transmit integrated circuit and conveys the second signal along a second transmission line to a second propagation antenna. The first and second propagation antennas transmit the first and second signals to a propagation path at different and separable polarizations to allow duplex communication with the propagation path.
|Wireless Communication Device Capable of Utilizing Multiple Radio Access Technologies - A wireless communication device is disclosed that is capable of utilizing multiple radio access technologies (RATs) in various coordinated ways so as to optimize, and enhance the versatility, of the device's communication capabilities. One or more RATs may be selected for use, either alone or in cooperation with each other, based on various conditions, such as channel conditions, traffic, data type, and priority. When conditions change, the originally-selected communication scheme may no longer be preferred. Consequently, the device can initiate a handover to another communication scheme. Transmitters corresponding to RATs that are not currently selected are controlled to enter a low-power state in order to conserve power. However, in some circumstances, the device may utilize both RATs simultaneously. For example, redundant communications can be made over both RATs for error-reduction or other purposes, and partial communications can be made over multiple RATs for increased speed and bandwidth, among other reasons.
|COMMUNICATION SYSTEM AND COMMUNICATION DEVICE - A communication system is provided, including a remote control for transmitting a remote control code corresponding to a user operation and a host apparatus for performing processing according to the remote control code, in which the host apparatus is configured to determine a frequency channel for a communication section included therein to be on receiving standby, the remote control is configured to transmit a channel shift request to the host apparatus when a signal is not transmitted on the frequency channel which the host apparatus is on receiving standby, and the host apparatus is also configured to change the frequency channel on which the communication section is on receiving standby after receiving the channel shift request.
|Multiple die communication system - Suitably arranged circuits located on a die surface of respective multiple dies are operatively connected via a physical link, which is configured for full-duplex operation. Data information content is transferred between the operatively connected suitably arranged circuits via the full-duplex physical link which is configured as a fragmented data interconnected (FDI) physical link allowing peer-to-peer operation and pipelining. The data information content is carried in data fragments by a self-contained data packet structure.
|RADIO FREQUENCY DEVICE AND MOBILE COMMUNICATION TERMINAL USING THE SAME - There is provided a radio frequency circuit device for multi-band and multi-mode which is low in a circuit loss, and a mobile communication terminal using the radio frequency circuit device. The radio frequency circuit device has a first path
|RF FRONT-END MODULE - A front-end module (FEM) includes first and second frequency band power amplifiers (PA), first and second frequency band receiver-transmitter (RX-TX) isolation modules, and an antenna interface unit. The PAs are operable to amplify first and second frequency band outbound RF signals, respectively. The RX-TX isolation modules are operable to isolate first and second frequency band inbound RF signals from first and second frequency band outbound RF signals in accordance with first and second frequency band isolation tuning signal, respectively. The antenna interface unit is operably tuned in accordance with an antenna interface tuning signal to output at least one of the first frequency band outbound RF signal and the second frequency band outbound RF signal and to receive at least one of the first frequency band inbound RF signal and the second frequency band inbound RF signal.
|WIRELESS DEVICE, WIRELESS APPARATUS USING SAME, AND WIRELESS SYSTEM - A wireless device wherein a first reception block carries out carrier sensing operation to check a condition of interfering wave before a first transmission block transmits a signal, and the first reception block halts operation thereof and makes the first transmission block transmit the signal when the first reception block confirms that the condition of interfering wave is within a predetermined range, or executes retry operation for carrying out the career sensing operation again when it confirms that the condition of interfering wave is outside of the predetermined range as a result of the career sensing operation.
|LOW DUTY CYCLE NETWORK CONTROLLER - Operating at least one low duty cycle (LDC) controller to maintain synchronization between the LDC controller and a plurality of LDC terminals operating over a communication network using only overhead channels of the network and conforming to the protocol and timing of said network, wherein synchronization between the LDC controller and the plurality of LDC terminals is maintained separately from the protocol and timing of the communication network, and enables the LDC controller to schedule power down and wake up of the plurality of LDC terminals for durations longer than allowable under the protocol and timing of the communication network.
|SUB-BAND DUPLEXER WITH ACTIVE FREQUENCY TUNING - Embodiments disclosed herein relate to programmable duplexers. The frequency pass band of the programmable duplexer is changed according to a selection of a channel-pair selection to control or maximize the transition band between the receiver path and the transmitter path. The programmable duplexer permits selections of desired pass bands without the need for multiple duplexer filters. As an additional advantage, the transmission band requirements become less sensitive to manufacturing tolerances and temperature variations.
|FRONT END MODULE WITH A TUNABLE BALANCING NETWORK - A radio front module includes a power amplifier, a duplexer, and a tunable balancing network. The power amplifier is operably coupled to amplify an up-converted signal into an outbound wireless signal. The duplexer is operably coupled to an antenna and operable to provide electrical isolation between the outbound wireless signal and an inbound wireless signal. The tunable balancing network is operable to establish an impedance that substantially matches an impedance of the antenna. The tunable balancing network includes a plurality of capacitive elements, a plurality of resistive elements, and a plurality of low-voltage switching elements operable to, and in accordance with a tuning signal, couple one or more of the plurality of capacitive elements and one or more of the plurality of resistive elements to the duplexer as an impedance balancing load.
|ACTIVE ANTENNA ARRAY AND METHOD FOR RELAYING RADIO SIGNALS WITH SYNCHRONOUS DIGITAL DATA INTERFACE - The present disclosure relates to an active antenna array for a mobile communications network. The active antenna comprises a base band unit coupled to a base station, a plurality of transceiver units and at least one link. The plurality of transceiver units is terminated by at least one antenna element. The at least one link couples individual ones of the plurality of transceiver units to the base band unit
|Automatic gain control apparatus and method in a wireless communication system - An apparatus and method for adaptively adjusting a target Received Signal Strength Indicator (RSSI) for Automatic Gain Control (AGC) in a full-duplex relay apparatus with an interference cancellation function. A Signal to Interference Ratio (SIR) estimation block estimates an SIR based on an interference signal estimated from a received signal and an interference-cancelled signal determined by cancelling the estimated interference signal from the received signal. A target RSSI determination block determines a target RSSI according to the estimated SIR. An AGC block adjusts a gain for the received signal based on the determined target RSSI.
|Method and Arrangement in a Wireless Communication Network - Method and arrangement in a relay node, for selecting communication mode. The relay node is configured to communicate with a base station via a donor antenna over a first link and to communicate with a user equipment via a coverage antenna over a second link. The method comprises obtaining an isolation value, based on the radio wave isolation between the relay donor antenna and the relay coverage antenna. The obtained isolation value is compared with an isolation threshold level value. The relay node is configured to communicate in full duplex mode if the obtained isolation value exceeds the isolation threshold level value, otherwise in half duplex mode. Information concerning the configured duplex mode of the relay node is transmitted to the base station.
|SYSTEM AND METHOD OF EXTENDING SMART CARD CAPABILITY VIA A COUPLING WITH A PORTABLE ELECTRONIC DEVICE - The invention is a portable host machine comprising a smart card and a connector. The connector has a set of pads able to communicate through a first protocol. The smart card has at least a first pad able to communicate using a second protocol. The connector has at least an additional pad able to communicate using the second protocol. The first and additional pads are privately linked into said portable host machine.
|SIMULTANEOUS MULTIPLE SIGNAL RECEPTION AND TRANSMISSION USING FREQUENCY MULTIPLEXING AND SHARED PROCESSING - A novel mechanism for simultaneous multiple signal reception and transmission using frequency multiplexing and shared processing. Multiple RF signals, which may be of various wireless standards, are received using one or more shared processing blocks thereby significantly reducing chip space and power requirements. Shared components include local oscillators, analog to digital converters, digital RX processing and digital baseband processing. In operation, multiple RX front end circuits, one for each desired wireless signal, generate a plurality of IF signals that are frequency multiplexed and combined to create a single combined IF signal. The combined IF signal is processed by a shared processing block. Digital baseband processing is performed on each receive signal to generate respective data outputs. Further, simultaneous full-duplex transmission and reception is performed using a single local oscillator. The phase/frequency modulation of the frequency synthesizer used in the TX is removed from the local oscillator signal for use in the receiver.
|Frame structures, method and apparatus for resource allocation in wireless communications system based on full duplex replay - Frame structures, a method and an apparatus for resource allocation in a wireless communication system based on a full duplex relay are provided. The method for a centralized resource allocation in the wireless communication system based on the full duplex relay includes receiving channel information from a plurality of mobile stations (MSs) and relay stations (RSs); scheduling radio resources for a link between a base station (BS) and the MS and a link between the BS and the RS using the channel quality; constituting a first radio resource region for the link between the BS and the RS and a second radio resource region for the link between the BS and the MS; and scheduling radio resource for a link between the RS and the MS by reusing the first radio resource region. The relay link resource is reused in the full-duplex relay structure, and the system capacity can be raised by minimizing the interference in the resource utilization.
|HYBRID PUSH-TO-TALK FOR MOBILE PHONE NETWORKS - A Hybrid Push-to-Talk (PTT) function for use in wireless communications networks, such as cellular mobile telephone networks. The cellular mobile telephone network includes at least one Real-Time Exchange (RTX) that interfaces to at least one Mobile Switching Center (MSC) in the cellular mobile telephone network to provide advanced voice services therein, wherein the advanced voice services provide instant two-way half-duplex voice messaging within a group of users of the cellular mobile telephone network, which is known as the Hybrid PTT function. In the Hybrid PTT function, a first talkburst or volley is transmitted by the RTX from an originating mobile to one or more terminating mobiles on one or more pre-established Internet Protocol (IP) sessions between the RTX and the mobiles. In addition, one or more circuit channels are established by the RTX with the mobiles through the MSC in parallel with the first talkburst or volley. Thereafter, second and subsequent talkbursts or volleys are transmitted by the RTX from the originating mobile to the terminating mobiles on the circuit channels.
|POLAR MODULATION APPARATUS AND COMMUNICATION DEVICE - Provided is a polar modulation apparatus which compensates for output characteristics of a power amplifier.
|Aggregation of Resources Over Multiple Frames in a TDD Communication System - According to embodiments of the present invention, multiple frames or sub-frames on an uplink channel may be aggregated into one logical unit for demodulation and decoding to allow one data packet to span over multiple frames. Multi-frame aggregation is enabled by modifying the uplink resource allocation messages transmitted to the user terminals. The multi-frame resource allocation message includes a BEGIN FLAG field indicating whether a corresponding frame is the first frame in a multi-frame allocation and a REMAINING RESOURCES field to indicate the number of units (e.g., slots or frames) remaining in the multi-frame allocation.
|Transmission for Half-Duplex Relay in Fading Channel and Rateless Code Configuration - In one aspect of the invention, a method for transmission in a wireless communication system includes selecting by a signal destination one of a source-destination direct transmission, a decode-forward relay transmission, and a compress-forward transmission, responsive to channel gains between a signal source and a relay, between the signal source and the signal destination, and between the relay and the signal destination; informing a selected transmission mode from the selecting step to the signal source and the relay; and operating in the selected transmission mode by the relay.
|WIRELESS COMMUNICATION METHOD - A wireless communication method includes attempting to establish a first wireless connection. Next, an attempt is made to establish a second wireless connection using a different channel from the first wireless connection. Subsequently, a determination is made as to whether the first wireless connection and the second wireless connection are established. When the first wireless connection and the second wireless connection are established, a manner of signal transmission between the first wireless connection and the second wireless connection is coordinated to transmit uplink data and downlink data, respectively, such that a duplex mode of operation is realized.
|ACOUSTIC WAVE FILTER, DUPLEXER USING THE ACOUSTIC WAVE FILTER, AND COMMUNICATION APPARATUS USING THE DUPLEXER - An acoustic wave filter having excellent steepness is provided without adding any exterior components or any new manufacturing steps. A plurality of filters (
|Systems and Methods of Efficient Band Amplification - Systems and methods for multi-band amplification. In an exemplary embodiment of the present invention, the multi-band amplification device has an uplink amplifier with a first port and a second port and a downlink amplifier with a first port and a second port. Furthermore, the multi-band amplification device has a first duplexer device in communication with the first port of the downlink amplifier and the second port of the uplink amplifier and a second duplexer device in communication with the first port of the uplink amplifier and the second port of the downlink amplifier. The first duplexer device is enabled to receive and transmit at least a downlink signal and an uplink signal of a first frequency band, a downlink signal and an uplink signal of a second frequency band, and a downlink signal and an uplink signal of a third frequency band. The second duplexer device is enabled to receive and transmit at least the downlink signal and the uplink signal of the first frequency band, the downlink signal and the uplink signal of the second frequency band, and the downlink signal and the uplink signal of the third frequency band.
|METHOD AND SYSTEM FOR PROVIDING FULL DUPLEX SERVICES OVER MULTIPLE SIMPLEX MEDIA PATHS AND SESSIONS - Methods for providing full duplex media service over a communications network employing simplex media paths are presented including: establishing a simplex media path and session over a terminal using a communication protocol; establishing an additional simplex media path and session over an additional terminal using the communication protocol; and utilizing the simplex media path and session with the additional simplex media path and session to provide full duplex media service between the terminal and the additional terminal. In some embodiments, after establishing the additional simplex media path and session, processing media on the additional terminal. In some embodiments, the communications network is a Push-to-Talk over Cellular (PoC) network and the simplex media path and session and the additional simplex media path and session are Push-to-Talk (PTT) sessions.
|AMPLIFIER APPARATUS, SIGNAL PROCESSING APPARATUS, RADIO COMMUNICATION APPARATUS, CONNECTOR MOUNTING STRUCTURE, AND COAXIAL CONNECTOR - There is provided an amplifier apparatus and a signal processing apparatus that reduce a delay or distortion of a power supply voltage used for drain modulation. An amplifier apparatus is an amplifier apparatus that performs drain modulation, and includes a printed circuit board having a first surface and a second surface; an amplifier circuit disposed on the first surface; and a modulation power supply circuit that supplies a variable power supply voltage for performing drain modulation, to the amplifier circuit. The modulation power supply circuit has an output portion that outputs the power supply voltage. The amplifier circuit has an input portion to which the power supply voltage is supplied. The output portion is located on the side of the second principal surface of the printed circuit board and is connected to the input portion through a conductor penetrating through the printed circuit board.
|GROUP COMMUNICATION SESSIONS THAT ARE AT LEAST PARTIALLY SUPPORTED OVER PERSONAL AREA NETWORKS IN A WIRELESS COMMUNICATIONS SYSTEM - In an embodiment, an application server receives a request to initiate a group communication session (GCS) over a Wireless Wide Area Network (WWAN) with a communication group. The application server obtains location information of a set of devices participating in the GCS and determines that the GCS can be supported between the set of devices via a Personal Area Network (PAN), after which the application server transitions support for the GCS from the WWAN to the PAN. In another embodiment, an originator begins a periodic broadcast of a local PAN signal announcing the GCS after failing to set-up the GCS via the WWAN. Target device(s) in the communication group receive the local PAN signal, determine not to transmit their own local PAN signal and then convey a session acceptance message to the originator. The GCS is then established between the target device(s) and the originator over the PAN.
|Full duplex network radio bridge with low latency and high throughput - A full duplex radio bridge using two transceivers coupled to a first packet network, one for transmitting data toward another radio bridge coupled to a second packet network, and the other for receiving data transmitted from the first packet network toward said second packet network by a transceiver of the other radio bridge. Each radio bridge is coupled to its packet network through one network port whose transmit data path is coupled to one of the transceivers, and whose receive data path is coupled to receive data from the other transceiver. An inner loop and outer loop is used. Management packets are routed to the various transceivers using the inner loop and outer loop by routing and filtering functions. Payload packets are transmitted from one packet network to the other using only the outer loop.
|Method for Switching a Mobile Station between Groups in Wimax Networks - A method switches a mobile station (MS) from a current group to a new group in a Worldwide Interoperability for Microwave Access (WiMAX) including a base station (BS). The BS operates in full duplex mode and the MS operates in half-duplex mode, such that the WiMAX network operates in semi-duplex mode. The MS receives from the BS, while the MS is in the current group, a group switching request in a downlink (DL) sub-frame. The MS also receives structural information regarding frames of the new group. The MS switches from the current group to the new group after receiving the structural information.
|RF PROCESSOR HAVING INTERNAL CALIBRATION MODE - The present invention pertains to a method of calibrating reception properties of a radio frequency (RF) processor. The application describes two embodiments of the invention representing calibration of the properties using an auxiliary transmitter to generate a calibration signal internal to the RF processor.
|LTE-ADVANCED (4G) FRONT END RADIO ARCHITECTURE - A front end radio architecture (FERA) is disclosed that includes a power amplifier (PA). The PA includes first and second input terminals and first and second output terminals and a PA die having first and second half amplifier cells, each of which includes an output amplifier stage. The first and second half amplifier cells are coupled to the first and second input terminals. First and second PA transformers each include first, second, and third windings. The first windings are coupled to the output amplifier stages. The second winding of the first PA transformer is coupled to the first output terminal of the PA and also coupled in series with the second winding of the second PA transformer. The third winding of the first PA transformer is coupled in series with the third winding of the second PA transformer, with one end of the second PA transformer being coupled to the second output terminal of the PA.
|SPLIT-BAND POWER AMPLIFIERS AND DUPLEXERS FOR LTE-ADVANCED FRONT END FOR IMPROVED IMD - A front end radio architecture (FERA) is disclosed that includes a transmitter block coupled to a power amplifier (PA) via first and second input terminals. A first split-band duplexer is coupled to a first output terminal of the PA and a second split-band duplexer is coupled to a second output terminal of the PA. The PA includes a first amplifier cell and a second amplifier cell that when coupled to the first and second split-band duplexers makes up first and second transmitter chains. Only one of the first and the second transmitter chains is active when a first carrier and a second carrier have a frequency offset that is less than an associated half duplex frequency within a same split-band duplex band, thus preventing third order inter-modulation (IMD) products from falling within an associated receive channel. Otherwise, the first and the second transmitter chains are both active.
|EXTENDING THE RANGE OF A HAND-PORTABLE RADIO - A repeater system for hand portable radios that may be outside normal coverage in a mobile radio system. Short messages or emergency messages from the portable radio are transmitted to an on-board or other mobile station, and forwarded from there to a central station or other required station in the system. The on-board station generally has a higher powered transmitter than the portable station and is within network coverage when the messages are received. The on-board station might be carried by a vehicle for example, and the portable station might be carried by a public safety official who has left the vehicle to investigate a nearby event.
|COMMUNICATION SYSTEM - The present invention addresses the difference in the basic concept of the communication means between a PoC system, which is a half-duplex communication system, and a general telephony, which is a full-duplex communication system, providing smooth communications. A communication system is provided with a communication controller which performs interconversion between communication control signal used in a telephone network and a communication control signal used on a PoC (Push-To-Talk over Cellular) system and a voice signal processor performing interconversion between a full-duplex voice signal used in the telephone network and a half-duplex voice signal used in the PoC system.
|METHOD AND APPARATUS FOR REDUCING A CHANNEL DEVIATION IN A MOBILE COMMUNICATION TERMINAL - A transmitting apparatus and a transmitting method for improving a channel deviation in a mobile communication terminal are provided. The transmitting apparatus includes a power amplifier for amplifying a transmitting signal by a predetermined level and outputting an amplified transmitting signal, a controller for outputting a signal to control a variable capacitor according to a channel of the transmitting signal and a phase transition unit for varying each capacitance value according to a control of the controller and transiting a phase of a signal outputted from the power amplifier.
|WIRELESS COMMUNICATION DEVICE - A wireless communication device includes a transceiving module, an antenna module, and a switch module. The transceiving module includes a first transceiver and a second transceiver. The antenna module includes at least a first antenna for transmitting electromagnetic signals in a first frequency range. The switch module switches different connections between the antenna module and the transceiving module, and includes a first switch, a second switch, a third switch, a fourth switch, and a first duplexer.
|TRANSFORMER-BASED CMOS OSCILLATORS - Techniques for providing transformer-based CMOS oscillators capable of operation with low voltage power supplies. In an exemplary embodiment, an LC tank is provided at the drains of a transistor pair, and the inductance of the LC tank is mutually magnetically coupled to an inductance between the gates of the transistor pair. A separate complementary transistor pair is also coupled to the LC tank. A further exemplary embodiment provides an LC tank at the gates of a transistor pair, as well as for three-way coupling amongst a tank inductance, an inductance between the gates of the transistor pair, and an inductance between the gates of a complementary transistor pair.
|Full-Duplex Wireless Communications - Full-duplex wireless communication is described. In an embodiment, a transceiver device having a transmitter circuit and a receiver circuit receives a data packet sent over a shared communication medium. In the embodiment, the transceiver reads the header of the data packet and starts transmitting an output signal on the same shared communication medium. Embodiments are described in which, whilst the transmission of the output signal is ongoing, the transceiver receives an impaired data signal which is made up of the payload of the data packet and interference from the output signal. In the embodiment, a cancellation signal is derived from the output signal, and this is combined with the impaired data signal to remove the interference and recover the payload of the data packet.
|Full duplex network radio bridge with low latency and high throughput - A full duplex radio bridge using two transceivers coupled to a first packet network, one for transmitting data toward another radio bridge coupled to a second packet network, and the other for receiving data transmitted from the first packet network toward said second packet network by a transceiver of the other radio bridge. Each radio bridge is coupled to its packet network through one network port whose transmit data path is coupled to one of the transceivers, and whose receive data path is coupled to receive data from the other transceiver. An inner loop and outer loop is used. Management packets are routed to the various transceivers using the inner loop and outer loop by routing and filtering functions. Payload packets are transmitted from one packet network to the other using only the outer loop.
|Dual Mode Base Station - A base station including at least a transceiver switch is provided enabling the base station to transmit and receive data in either FDD or TDD mode from an antenna. The base station may be provided with a synthesiser which can be retuned from FDD to TDD mode or alternatively, an FDD and a TDD synthesiser and a switch enabling the transmitter and receiver of the base station to process FDD or TDD mode data respectively.
|SETTING UP A FULL-DUPLEX COMMUNICATION SESSION AND TRANSITIONING BETWEEN HALF-DUPLEX AND FULL-DUPLEX DURING A COMMUNICATION SESSION WITHIN A WIRELESS COMMUNICATIONS SYSTEM - In an embodiment, an originating device sends a request, to a server, to initiate a full-duplex session with a target device. Responsive to the full-duplex request, a half-duplex session is set-up from the originating device to the target device before the full-duplex session is set-up. The target device indicates its acceptance of the half-duplex session, receives half-duplex media from the originating device and selectively indicates its acceptance of the full-duplex session. In another embodiment, during a session currently supported either by half-duplex or full-duplex, the server arbitrating the session receives a request from one of the session participants to transition the session to another duplex-type. The server then selectively transitions the duplex-type of the session.
|Bi-directional packet data transmission system and method - A bi-directional packet data transmission system for a packet data transmission between a terminal and a radio access network includes an uplink resource and a downlink resource which are independently set. Memory resources can be effectively managed even in a packet data transmission service with the asymmetrical structure such that the packet amount for the downlink is much greater than the packet amount for the uplink, or the packet amount for the uplink is much greater than the packet amount for the downlink.
|Common Mixer Methods and Circuits in Mobile Communication Devices - GPS functionality is added to a wireless communication device in an efficient and cost effective manner. Disclosed is a wireless communications device that has a common mixer constructed to be used for a GPS signal and another signal, a common IF filter constructed to be used for a GPS signal and another signal, in addition to other cost effective embodiments.
|Bi-directional packet data transmission system and method - A bi-directional packet data transmission system for a packet data transmission between a terminal and a radio access network includes an uplink resource and a downlink resource which are independently set. Memory resources can be effectively managed even in a packet data transmission service with the asymmetrical structure such that the packet amount for the downlink is much greater than the packet amount for the uplink, or the packet amount for the uplink is much greater than the packet amount for the downlink.
|MOBILE WIRELESS COMMUNICATIONS DEVICE INCLUDING A POWER DIVIDER CONNECTING AN LNA TO MULTIPLE RECEIVE SIGNAL CHAINS - A mobile wireless communications device may include an antenna, a wireless radio frequency (RF) receiver, a wireless RF transmitter, and a duplexer connecting the wireless RF receiver and the wireless RF transmitter to the antenna. More particularly, the wireless RF receiver may include a low noise amplifier (LNA) connected to the duplexer, a first receive signal chain for wireless communications signals having a first signal type downstream from the LNA, a second receive signal chain for wireless communications signals having a second signal type different than the first frequency band downstream from the LNA, and a power divider connecting the LNA to the first and second receive signal chains.
|Wireless Communication Apparatus - A wireless communication apparatus includes an RF front-end unit constituting reception and transmission systems, a digital baseband signal processor, and a bias current circuit. The digital baseband signal processor performs a process of a digital baseband receive signal received from a reception system and performs a process of a digital baseband transmit signal supplied to a transmission system. The bias current circuit supplies a reference current to at least a part of a circuit constituting the reception system within the RF front-end unit. The bias current circuit switches the reference current supplied to at least the part of the circuit constituting the reception system within the RF front-end unit, in response to a transmission-operation control signal outputted by the digital baseband signal processor to the transmission system within the RF front-end unit.
|METHOD AND SYSTEM FOR A DUPLEXING LEAKY WAVE ANTENNA - Methods and systems for a duplexing leaky wave antenna (LWA) are disclosed. In this regard, RF signals may be concurrently transmitted and received via a leaky wave antenna, wherein a height of a first portion of a resonant cavity of the leaky wave antenna is different than a height of a second portion of the resonant cavity. RF signals transmitted may be at or near a first frequency and RF signals received be at or near a second frequency. The height of the first portion of the resonant cavity and/or the height of the second portion of the resonant cavity may be controlled by applying one or more voltages which causes one or both reflective surface of the leaky wave antenna to deflect. The leaky wave antenna may be integrated on and/or within an integrated circuit, an integrated circuit package, a printed circuit board, or a combination thereof.
|FULL-DUPLEX WIRELESS COMMUNICATION USING A SINGLE TRANSMITTER - A system for fall-duplex communication using a single transmitter is presented. The system comprises a base station with a signal and data processor, peripheral detectors each placed at a distance from the transmitting antenna, and a mobile device having at least a dipole antenna having a switch and a loop antenna having a switch, wherein the sending device modulates the shorting state, i.e., the electromagnetic configuration, of the wire and coil antennas using the switches, the modulating resulting in alteration in load at the base station. This alteration can be calculated based on input from the transmitting antenna and the detectors, each input having time coding. The input from the transmitting antenna can be magnitude of propagated signal and the input from each detector can comprise a quantified signal level and the quantified signal level time-delayed by propagation time. The detectors can be peripheral signal level detecting antennas.
|MOBILE WIRELESS COMMUNICATIONS DEVICE INCLUDING A DIFFERENTIAL OUTPUT LNA CONNECTED TO MULTIPLE RECEIVE SIGNAL CHAINS - A mobile wireless communications device may include an antenna, a wireless radio frequency (RF) receiver, a wireless RF transmitter, and a duplexer connecting the wireless RF receiver and the wireless RF transmitter to the antenna. More particularly, the wireless RF receiver may include a low noise amplifier (LNA) connected to the duplexer and having first and second differential outputs, a first receive signal chain for wireless communications signals having a first signal type connected to the first differential output of the LNA, and a second receive signal chain for wireless communications signals having a second signal type different than the first signal type connected to the second differential output of the LNA.
|Power Detector Radio Frequency Multiplexer - Implementations related to systems and devices that make use of a power detector multiplexer are presented herein.
|SYSTEM, METHOD AND APPARATUS FOR AN EFFICIENT INFORMATION BROADCAST IN A MULTI-CARRIER WIRELESS NETWORK - Embodiments of an apparatus, system and method are described for a base station. Notification from a mobile station in a network may be received. A multi-carrier advertisement with a base station multi-carrier configuration may be sent. The base station multi-carrier configuration may include at least one carrier index associated with a carrier frequency operated on by the base station. Other embodiments are described and claimed.
|TRANSMISSION OF UPLINK CONTROL SIGNALS IN A COMMUNICATION SYSTEM - A method and apparatus of a User Equipment (UE) to simultaneously transmit information of a first type and information of a second type over a number of transmission symbols, the information of the first type and the information of the second type being respectively associated with a first Orthogonal Cover Code (OCC) and a second OCC, wherein a length of each OCC is equal to the number of transmission symbols. The method includes multiplying, at each transmission symbol, the information of the first type with a respective element of the first OCC to obtain a first output; multiplying, at each transmission symbol, the information of the second type with a respective element of the second OCC to obtain a second output; summing the first output and the second output to obtain a combined output; and transmitting the combined output.
|METHOD AND ARRANGEMENT FOR CONNECTING AN AD-HOC COMMUNICATION NETWORK TO A PERMANENT COMMUNICATION NETWORK - A method and arrangement for connecting an ad-hoc communication network (
|ACTIVE ANTENNA ARRAY AND METHOD FOR CALIBRATION OF RECEIVE PATHS IN SAID ARRAY - An active antenna array for a mobile communications system is disclosed which comprises a plurality of receive paths in which an individual one of the receive paths is connected between an antenna element and an analogue to digital converter and wherein the analogue to digital converter digitises a receive signal to form a digitised receive signal. The active antenna array further comprises a sounding signal generator for generating a sounding signal in which the sounding signal is supplied to at least two of the plurality of receive paths and a receive signal subtraction device for subtracting a wanted signal from the digitised receive signal.
|Communication Apparatus to Support Multiband Communication - A communication apparatus to support multiband communication is provided. The communication apparatus may be applicable to, for example, a duplexer module for the multiband communication. The communication apparatus may be manufactured to be small and light by simplifying a circuit structure of the duplexer module.
|CONNECTION CONTROL IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for performing connection control in a wireless communication system is described. In one embodiment, an apparatus is used in a wireless communication system for communicating with a wireless network, and the apparatus comprises a host processor, a transceiver, a physical interface coupling the host processor and the transceiver; and a memory accessible by the host processor and the transceiver to exchange information between the host processor and the transceiver. The memory has multiple banks that include: a first bank to store information being transferred from the host processor to the transceiver, and a second bank to store information being transferred from the transceiver to the host processor, the second bank being different than the first bank, to facilitate full-duplex communication of packet data between the host processor and the transceiver.
|System and method for controlling a wireless device - A method is provided for controlling operation of a wireless device, including: receiving an initial incoming signal from a remote device in a first operational mode, the initial incoming signal including information related to an initial remaining battery power in the remote device; determining that a second operational mode will be a first possible mode if the initial remaining battery power in the remote device is within a first power range; determining that the second operational mode will be a second possible mode if the initial remaining battery power in the remote device is within a second power range; and transmitting instructions to the remote device in the first operational mode to transmit and receive in the second operational mode.
|Network Combining Wired and Non-Wired Segments - A network (
|FULL DIVISION DUPLEX SYSTEM AND A LEAKAGE CANCELLATION METHOD - An exemplary embodiment of a full division duplex system comprises a receiver, a transmitter and an auxiliary circuit. The receiver receives an inbound RF signal of a first band to generate an inbound baseband signal, and the transmitter up converts an outbound baseband signal by an oscillation signal to generate an outbound RF signal of a second band for transmission. The auxiliary circuit calculates leakages from the outbound RF signal to generate a blocker replica, in which a LNA is coupled to a non-conductive coupling path extended from the input of receiver to collect leakages from the outbound RF signal to produce an induction signal. The induction signal is down converted to perform an adjustment, and thereafter up converted again to generate the blocker replica. In this way, the inbound baseband signal is generated from a subtraction of the inbound RF signal and the blocker replica.
|NETWORK ENTRY APPARATUS AND METHOD FOR RELAY STATION USING FULL DUPLEX IN MOBILE COMMUNICATION SYSTEM - A network entry apparatus and method for a Radio Station (RS) using full duplex in a mobile communication system are provided. The method includes performing a capability negotiation procedure including a full duplex function with a BS, performing an authentication and registration procedure with the BS, and performing an operation parameter configuration procedure including a full duplex function with the BS.
|SINGLE CHANNEL FULL DUPLEX WIRELESS COMMUNICATIONS - In one aspect there is provided a method. The method may include receiving a first analog radio frequency signal including a signal of interest and an interference signal caused by a second analog radio frequency signal transmitted in full duplex over a channel from which the first analog transmission is received; combining the first analog radio frequency signal and a portion of the second analog radio frequency signal to generate an output analog radio frequency signal characterized by at least a reduction or an elimination of the interference signal included in the output analog radio frequency signal; and providing the output analog radio frequency signal. Related apparatus, systems, methods, and articles are also described.
|FEMTOCELL TUNABLE RECEIVER FILTERING SYSTEM - A tunable receiver system uses programmable notch filters to identify available channel pairs for transmitting and receiving data via a femtocell base station. In addition, one of the programmable notch filters may be used to suppress infiltration of the transmit path signal into the receiver path of the receiver device. The other programmable notch filter may be used to suppress a blocker signal identified by the receiver device.
|METHOD, BASE STATION, AND USER TERMINAL FOR IMPLEMENTING UPLINK RESOURCE INDICATION - A method, a base station (BS), and a user terminal for implementing uplink resource indication are provided. The method includes: carrying an uplink resource index in a ul grant, in which the uplink resource index is corresponding to at least one uplink resource in terms of indication; and sending the ul grant. The BS includes an index carrying module and an instruction sending module. The user terminal includes an instruction receiving module, an instruction resolving module, and an execution module.
|GENERALIZED DIVISION FREE DUPLEXING TECHNIQUES FOR DECREASING RENDEVOUS TIME - Provided are methods and systems of using division-free duplexing (DFD) to reduce rendezvous time between two or more cognitive radio devices. The cognitive radio devices may opportunistically use available frequency spectra by communicating over available channels. To communicate, a first device may rendezvous with a second device by transmitting a beaconing signal over a frequency on which the second device is listening. DFD techniques may enable each of the devices to listen to a channel while concurrently transmitting beacon signals over the same channel. As periods of listening and periods of transmitting over the same channel need not be separated due to the transmitter cancelling approach used in DFD techniques, rendezvous time may be significantly reduced. Further, embodiments include a generalized DFD (GDFD) approach wherein devices listen to a broad band of frequencies, thus further reducing rendezvous time.
|Broadband Repeater with Security for Ultrawideband Technologies - An ultrawideband radio transceiver/repeater provides a low cost infrastructure solution that merges wireless and wired network devices while providing connection to the plant, flexible repeater capabilities, network security, traffic monitoring and provisioning, and traffic flow control for wired and wireless connectivity of devices or networks. The ultrawidebande radio transceiver/repeater can be implemented in discrete, integrated, distributed or embedded forms.
|COMMUNICATIONS DEVICE WITH MULTIPLE RECEIVE AND TRANSMIT PATHS AND RELATED METHODS - A communications device may include a first transmit path having a first band pass filter operating at a first frequency band having a first bandwidth, and a second transmit path having a second band pass filter operating at a second frequency band having a second bandwidth. The second frequency band may be adjacent the first frequency band and the second bandwidth may be less than the first bandwidth. The communications device may include a third receive path operating at a third frequency band having a third bandwidth, and a fourth receive path operating at a fourth frequency band having a fourth bandwidth. The fourth frequency band may be adjacent the third frequency band, and the fourth bandwidth may be less than the third bandwidth.
|Redundant multicast service in wireless network - In a wireless network in which the base station has full duplex capability (can transmit on the downlink channel and simultaneously receive on the uplink channel), but the mobile stations have only half duplex capability (each can transmit on the uplink channel and receive on the downlink channel, but not simultaneously), the base station may transmit duplicate copies of multicast data in two or more frames. Some of the addressed mobile station may be scheduled to receive the first frame and transmit during the second frame, while the other addressed mobile stations may be scheduled to transmit during the first frame and receive the second frame.
|Method and System of Communicatons - The present invention relates to wireless communications, and more specifically it relates to a method and system of relaying of wireless communications. Particularly, it relates to suppression and elimination of self-induced interference and oscillations in such systems, thereby facilitating repeaters with increased amplification gain providing extended communication range and improved performance in terms of data rates. Preferred embodiments specify antenna element weighting providing such interference suppression. The invention is, e.g., useful for spatial multiplexing and MIMO communications.
|COMMUNICATION SYSTEM, A COMMUNICATION METHOD, AND A COMMUNICATION APPARATUS - A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity.
|TRANSMITTER APPARATUS OF MOBILE DEVICE AND OPERATION METHOD THEREOF - In a transmitter apparatus of a mobile device, a radio frequency unit has transmitting terminals for sending wireless signals of different frequency bands. Transmission filters are respectively connected to the transmitting terminals and perform a filtering process for the signal of each frequency band. A first switch has a single output terminal and input terminals respectively connected to the transmission filters, performing a switching operation to connect one of the input terminals and the output terminal in response to a control signal. A power amplifier amplifies the signal transmitted through the output terminal of the first switch. A second switch has a single input terminal connected to the power amplifier, and output terminals corresponding to the transmission filters. The second switch performs a switching operation to connect the input terminal and one of the output terminals in response to the control signal.
|Method and Arrangement for Improved Feeder Sharing in a Telecommunication System - A filter arrangement (EFM) comprises a first terminal (T
|METHOD OF COMMUNICATION BETWEEN DEVICES OPERATING WITHIN A WIRELESS COMMUNICATION SYSTEM - A subscriber station (SS) utilizes uplink resources that have been assigned to it for communicating with an infrastructure station to exchange data with a neighboring SS while maintaining its link to the infrastructure station. This is accomplished by the SS receiving an uplink allocation from the infrastructure station, transmitting a subscriber-to-infrastructure station header and trailer to the infrastructure station using the modulation and coding scheme (MCS) assigned by the infrastructure station and also transmitting a subscriber-to-subscriber (S2S) message payload, optionally using a second MCS level appropriate for the link between itself and the receiving SS. The subscriber to infrastructure station message is composed so that it occupies the first m codewords and contains a header that describes the length of the subscriber to infrastructure station message. The subscriber to infrastructure station message, then, is followed by the S2S message, composed to occupy the remaining symbols of the allocation.
|Frequency synthesizers for wireless communication systems - Synthesizers are configured with first and second phase-locked loops (PLL's). The first PLL is arranged to include a digitally-controlled oscillator (DCO) and to respond to an input signal to provide a reference signal with a plurality of selectable reference frequencies. The second PLL is arranged to include a voltage-controlled oscillator (VCO) to thereby provide output signals in response to the reference signal. This synthesizer structure is particularly effective when responding to a noisy input signal as may be the case, for example, in wireless communication systems that provide a network clock to transceivers through lengthy optical links.
|METHOD AND SYSTEM FOR HALF DUPLEX AUDIO IN A BLUETOOTH STEREO HEADSET - Aspects of a method and system for half duplex audio in a Bluetooth stereo headset are provided. A service type and/or service activity levels may be detected over a link in a duplex communication system. The link may be dynamically changed according to the detected service activity levels in both direction of the link. The duplex communication system may be a communication system capable of supporting duplex communication, for example, a Bluetooth system, or a 3GPP system, or a WiMAX system, or a WiFi system. The link may be a synchronous connection-oriented (SCO) link such as the SCO link. The duplex communication system may be enabled to determine an operating mode, whether symmetric or asymmetric, based said detected service type and/or said detected service activity levels over the SCO link. In this regard, the SCO link may be dynamically switched from symmetric to asymmetric operating mode and vice versa.
|RADIO FREQUENCY FRONT-END CIRCUIT FOR WIRELESS COMMUNICATION DEVICE - A radio frequency (RF) front-end circuit includes a multiband antenna, an antenna switch, a duplexer, a communication mode selection switch, and a processor. The processor selectively connects the antenna switch or the duplexer to the multiband antenna using the communication mode selection switch. When the multiband antenna is connected to the antenna switch, the processor directs the antenna switch to transmit wireless signals used in a first wireless communication system received by or sent from the multiband antenna; when the multiband antenna is connected to the duplexer, the duplexer transmits wireless signals used in a second wireless communication system received by or sent from the multiband antenna.
|RADIO TRANSMISSION SIGNAL DETECTION CIRCUIT - A detection circuit has a detector unit for detecting a transmitted signal from a mobile radio terminal. The detection circuit forms a part of a circuit arrangement for processing or influencing received signals and transmitted signals associated with the mobile radio terminal (accessory circuit). It is involved in the accessory circuit via a switching means, which is arranged in a transmission path upstream of at least one transmission power amplifier which can be activated upon detection of a transmitted signal, and is coupled to the transmission path via a coupling element which is arranged downstream of the transmission power amplifier. At the start of the transmission burst, the whole power of the transmitted signal is first of all supplied to the detector unit before said detector unit changes over the transmitted signal to the transmission power amplifier by operating the switching means. The detection circuit has a self-hold function, so that the detector unit leaves the accessory circuit in its operating state which is provided for the presence of a transmitted signal, even after the switching means has been changed over, at least until the transmission power amplifier has completed the circuit and the component of the amplified transmitted signal which is coupled out by means of the coupling element is applied to the detector unit.
|Rapid on-off-division duplex network communications - A wireless network device is structured to transmit and receive information over a unique pattern of one or more transmission slots and one or more reception slots within each of a sequence of communication frames.
|MUROS Modulation using Linear Baseband Combinations with Linear Gaussian Pulse Shaping for Two users on One Timeslot used by Non-DARP and DARP Remote Stations - The present patent application improves DARP by allowing multiple users on one time slot (MUROS). It comprises means, instructions and steps for combining two signals. In one example, it comprises at least one baseband modulator, a plurality of amplifiers where the signals are multiplied by a gain; at least one combiner operably connected to the amplifiers where the signals are combined; and a phase shifter where one of the signals is phase shifted with respect to the other signal. In another example; the apparatus further comprises a phase shifter operably connected to the at least one baseband modulator to provide a π/2 phase shift between the two signals. In another example, the at least one baseband modulator comprises a BPSK baseband modulator on an I axis and a BPSK baseband modulator on a Q axis.
|Methods and Apparatus for Improved Receiver Performance in Half-Duplex Wireless Terminals - A half-duplex mobile terminal having first and second receiver branches connected, during a receive mode, to respective antennas, is disclosed. One of the antennas is selectively connected to the first receiver branch or to a transmitter circuit. The first antenna is connected to the first receiver branch during a first interval, during which interval data is detected using outputs from both the first and second receiver branches. The first antenna is disconnected from the first receiver branch at the end of the first interval, and, during a second interval immediately following the first interval, data is detected using the output of the second receiver branch. A portion of the incoming transmission that arrives during the transition between the receive mode and transmit mode in a half-duplex transceiver is thus received and detected, improving performance of the half-duplex transceiver.
|Method for a Canceling Self Interference Signal Using Active Noise Cancellation in RF Circuits and Transmission Lines for Full Duplex Simultaneous (In Time) and Overlapping (In Space) Wireless Transmission & Reception on the Same Frequency band - A method for full duplex communication includes creating a canceling self interference signal using active noise cancelation in RF circuits and transmission lines with a plurality of receive antennas being used and a signal received by the antennas are destructively combined in the transmission lines and passive RF components, and attaining full-duplex simultaneous in time and overlapping in space wireless transmission and reception on same frequency band responsive to the step of creating a canceling self interference signal.
|RF Front-End With On-Chip Transmitter/Receiver Isolation and Noise-Matched LNA - Embodiments of an RF front-end are presented herein. In an embodiment, the RF front end comprises a power amplifier (PA), a noise-matched low-noise amplifier (LNA), a balance network, and a four-port isolation module. A first port of the isolation module is coupled to an antenna. The second port of the isolation module is coupled to the balancing network. The third port is coupled an output of the PA. The fourth port is coupled to a differential input of the noise-matched LNA. The isolation module effectively isolates the third port from the fourth port to prevent strong outbound signals received at the third port from saturating the LNA coupled to the fourth port. Isolation is achieved via electrical balance. In an embodiment, the signal path coupling the antenna at the first port to the differential input of the LNA at the fourth port is shorter than a wavelength of the inbound signal received by the antenna.
|HYBRID ARCHITECTURE FOR RADIO FREQUENCY IDENTIFICATION AND PACKET RADIO COMMUNICATION - A radio frequency identification ("RFID") hybrid packet radio is provided having full duplex operability. The RFID packet radio includes an antenna and a radio that receives and transmits a packet radio signal and a RFID signal. A processor is provided in communication with the radio to perform signal detection and demodulation with respect to the RFID signal. A transmit path is provided to transport the packet radio signal and the RFID signal from the radio to the antenna. The RFID packet radio includes a first receive path for transporting a received packet radio signal from the antenna to the radio and a second receive path, different from the first receive path, to transport a received RFID signal from the antenna to the processor. The first receive path and the second receive path enable simultaneous transmission and reception of RFID signals.
|DUAL-MODE MIXER - The present invention relates to a mixer for signals at different frequencies comprising a network of diodes formed by a pair of diodes mounted in an anti-parallel manner, the first linking point of the diodes being connected to the ground, the second linking point being connected to the ports of transmission/reception signal paths and to the port of a local oscillator path at different frequencies. An impedance matching network for dual-mode use is connected in series in the diode network between the first linking point connected to the ground and the anode of one of the diodes of the diode network. A filtering network is connected between the second linking point and each of the ports of the transmission/reception paths and of the local oscillator path.
|RF Front-End with On-Chip Transmitter/Receiver Isolation Using the Hall Effect - An RF front-end with on-chip transmitter/receiver isolation using a gyrator is presented herein. The RF front end is configured to support full-duplex communication and includes a gyrator and a transformer. The gyrator includes a metal plate and an inductor that are configured to isolate the input of a low-noise amplifier (LNA) from the output of a power amplifier (PA) using the Hall effect. The gyrator is further configured to isolate the output of the PA from the input of the LNA. The gyrator is at least partially or fully capable of being integrated on silicon-based substrate.
|WIRELESS COMMUNICATION APPARATUS, CONTROLLING METHOD THEREOF, AND PROGRAM - A wireless communication apparatus that conducts full-duplex wireless communication with a communication partner using a transmitting antenna and a receiving antenna is provided. The apparatus includes a transmitting unit configured to transmit a signal via the transmitting antenna using a first frequency channel, a receiving unit configured to receive a signal via the receiving antenna using a second frequency channel different from the first frequency channel, and a control unit configured to control beam angle of directionality of at least one of the transmitting antenna and the receiving antenna, so that direction of a communication path of a signal which the transmitting unit transmits and the communication party receives, and direction of a communication path of a signal which the communication party transmits and the receiving unit receives, differ from each other.
|Half-Duplex Phased Array Antenna System - In an exemplary embodiment, a phased array antenna comprises a bidirectional antenna polarizer and is configured for bidirectional operation. The bidirectional antenna polarizer may combine active implementations of power splitters, power combiners, and phase shifters. Furthermore, in another exemplary embodiment a bidirectional antenna polarizer has extensive system flexibility and field reconfigurability. In yet another exemplary embodiment, the bidirectional phased array antenna operates in "radar-like" applications where the transmit and receive functions operate in half-duplex fashion. Furthermore, in exemplary embodiments, the phased array antenna is configured to operate over multiple frequency bands and/or multiple polarizations.
|RADIO FREQUENCY UNIT AND INTERGRATED ANTENNA - A radio frequency unit and an integrated antenna are provided. The radio frequency unit includes a duplexer, a power amplifier circuit board, and a transceiver circuit board. The duplexer connects to the power amplifier circuit board and the transceiver circuit board. The power amplifier circuit board connects to the transceiver circuit board. The power amplifier circuit board and the transceiver circuit board are respectively located at two end portions of the duplexer. The power amplifier circuit board and the transceiver circuit board are projected onto the same plane along a direction being vertical to the power amplifier circuit board with their projections on the same plane non-overlapped each other.
|Method and Arrangement in a Wireless Communication System - The present invention relates to a method and a transmitting unit in a wireless communication system. The transmitting unit is configured to transmit over multiple antennas pointing in different directions. Each antenna provides a beam partially overlapping with at least one other antenna. The method for the transmitting unit comprises switching in time between transmitting (
|Method and System for Distributed Communication - A decentralized communication device is provided that facilitates optimal positioning and orientation of one or more antennas for wireless communication with external devices. The decentralized communication device includes one or more master components and one or more slave components. The master and the slave components are physically separate and communicate wirelessly. In some embodiments the slave acts as a carrier frequency translator between the master and an external wireless device, where it communicates with the external device using a first frequency and communicates with the master using a second frequency which is different from the first frequency. In another embodiment the slave has most or all the physical layer to do the digital coding, digital modulation, data framing, data formatting and data packetization for communicating with an external device, in which case digital coding and digital modulation is distributed between the master and the slave.
|ACTIVE ANTENNA SYSTEM AND METHOD FOR COMBINING SIGNALS - An active antenna transceiver system is disclosed. The active antenna transceiver system comprises a bandpass filter adapted to filter first telecommunication signals in a first frequency band, the first telecommunication signals being transceived in a first antenna section, an active transceiver arrangement adapted to transceive second telecommunications signal in a second frequency band, an antenna arrangement adapted to radiate and/or collect signal in both the first and second frequency bands. A combining element is provided for combining first telecommunications signal and second telecommunication signal into a combined telecommunications signal to be fed into antenna arrangement and the combining element being adapted for splitting the combined telecommunications signal from the antenna arrangement into first telecommunication signals and second telecommunications signals.
|Methods and Apparatus for Perr-to-Peer Non-Simultaneous Communication - A method and apparatus for facilitating communication between a plurality of wireless devices is provided. The method may comprise establishing, by a first wireless device, a communication path with at least one of a plurality of wireless devices via a network, wherein the communication path provides for half duplexed direct communication between the first wireless device and the at least one of the plurality of wireless devices, maintaining each established communication path until a triggering event occurs, generating content, in the first wireless device, to be transmitted to at least one of the plurality of wireless devices with the established communication path, wherein the generated content includes non-voice data, and transmitting, from the first wireless device, the generated content through the established communication path to the at least one wireless device of the plurality of wireless devices.
|Network Node, Network and a Method for Waking Up a Network Node - A network node for connecting a network with a terminal is described, wherein the network node includes a sleep control device. The sleep control device includes a terminal linking device and a network linking device. The terminal linking device is adapted to connect to a terminal, wherein the network linking device is adapted to connect to a network. Furthermore, the network node is adapted to enter a standby mode, wherein the sleep control device is further adapted to switch on the network node on appearing of at least one trigger event of (i) appearing of a predefined signal sequence on the terminal linking device during a monitoring period of a listen cycle or (ii) appearing of a terminal paging signal sequence on the network linking device. The sleep control device is adapted to detect during the monitoring period the predefined signal sequence on the terminal linking device.
|MOBILE WIRELESS COMMUNICATIONS DEVICE INCLUDING A DIFFERENTIAL OUTPUT LNA CONNECTED TO MULTIPLE RECEIVE SIGNAL CHAINS - A mobile wireless communications device may include an antenna, a wireless radio frequency (RF) receiver, a wireless RF transmitter, and a duplexer connecting the wireless RF receiver and the wireless RF transmitter to the antenna. More particularly, the wireless RF receiver may include a low noise amplifier (LNA) connected to the duplexer and having first and second differential outputs, a first receive signal chain for wireless communications signals having a first signal type connected to the first differential output of the LNA, and a second receive signal chain for wireless communications signals having a second signal type different than the first signal type connected to the second differential output of the LNA.
|Method, Apparatus and System for Transmitting ACK Response in Bidirectional Data Transmission - It is provided a method, device and system for transmitting an ACK response in bidirectional data transmission. When receiving windows on both sides of a transmission are simultaneously full, no new information frames can be transmitted to the other side before the ACK timer times out. This situation is called an ACK interlock delay. In the present disclosure, a communication device actively transmits a control frame carrying an ACK response to an opposite communication terminal when it detects that the local receiving window and the receiving window of the opposite communication terminal are both full, thus avoiding ACK interlock delays, avoiding wasting time, and improving the rate of transmission and link establishment.
|MODULE FOR MOBILE COMMUNICATION TERMINAL AND MOBILE COMMUNICATION TERMINAL - A tunable filter has an out-of-band signal suppression amount of 30 dB that is smaller than 50 dB, the suppression amount of a typical duplexer. Thus, a canceller having a suppression amount of about 20 dB is necessary (particularly, a method is provided to obtain a suppression amount over a wide band without being adversely affected by the group delay characteristics and frequency characteristics of an amplifier included in a canceller). Delay devices corresponding to the group delay of the amplifier are disposed on the signal path of the tunable filter. The canceller includes a matching circuit that adjusts an amplitude, a phase, and a delay, a wide-band amplifier that has small amplitude fluctuations and small phase fluctuations over the frequency bands of a transmission signal and a reception signal, a variable-impedance transmission coupler, and a variable-impedance reception coupler.
|METHOD FOR SUPPORTING NODE MOBILITY IN WIRELESS MESH NETWORK - Provided is a method of data transmission from an access router in a wireless mesh network. The method of data transmission includes: receiving, from a gateway, a broadcast message indicating that a connection to the external internet can be made; establishing a bi-directional path to the gateway;
|RADIO BASE STATION AND RADIO COMMUNICATION METHOD - RRHs are physically independent from each other, are arranged in different positions, respectively, receive uplink signals from a radio terminal and transmit downlink signals to the radio terminal. A central processing unit receives the uplink signals from the plurality of RRHs and transmits the downlink signals to the plurality of RRHs. A setting unit sets a part or all of the RRHs as RRH(s) in a first group suitable for transmission of the downlink user data based on the uplink or downlink signals received by at least one of the RRHs. A transmission control unit controls the transmission of the downlink user data from the plurality of RRHs based on the setting.
|SOFTWARE RADIO FREQUENCY CANCELLER - A full-duplex RF communication system and corresponding methods use digital adaptive filters for interference cancellation. As provided, the techniques allow full-duplex radio frequency communication without frequency-, time-, or code-division multiplexing and without the use of hardware RF cancellers. Such techniques may be useful for wireless communication, such a cellular communication, radio communication, broadcasting, short-range point-to-point communication, wireless sensor networks, and wireless computer networks.
|MOBILE WIRELESS COMMUNICATIONS DEVICE INCLUDING A POWER DIVIDER CONNECTING AN LNA TO MULTIPLE RECEIVE SIGNAL CHAINS - A mobile wireless communications device may include an antenna, a wireless radio frequency (RF) receiver, a wireless RF transmitter, and a duplexer connecting the wireless RF receiver and the wireless RF transmitter to the antenna. More particularly, the wireless RF receiver may include a low noise amplifier (LNA) connected to the duplexer, a first receive signal chain for wireless communications signals having a first signal type downstream from the LNA, a second receive signal chain for wireless communications signals having a second signal type different than the first frequency band downstream from the LNA, and a power divider connecting the LNA to the first and second receive signal chains.
|WIRELESS HEADSET COMMUNICATION SYSTEM - A communication system that includes one or more mobile wireless headsets with full duplex capabilities, a server, and a communication access point configured to deliver communications between the server and the mobile wireless headsets. The communication access point can be a multi-cell network of multiple communication access points.
|CONFIGURATION AND ALIGNMENT TOOL FOR COMPUTER NETWORK RADIO EQUIPMENT - A compact tool (
|Antenna feed network for full duplex communication - The present invention provides a wireless device for effecting two way wireless transmission, an antenna feed network, and a patch antenna. The wireless device includes an antenna assembly having two inputs accepting two feed signals shifted a feed signal phase difference apart. The antenna assembly receives a radiated signal and produces first and second received signals. First and second reflected feed signals are also produced at the two antenna inputs. A transmitter produces a transmission signal and a receiver receives the radiated signal while the transmission signal is transmitted by the antenna assembly. The antenna feed network interconnects the transmitter port, the receiver port, and the antenna assembly and produces the received signal while effecting substantial cancellation of the first and second reflected feed signals. Additionally, or alternatively, first and second transmission leakage signals at the received signal output substantially cancel each other.
|FULL DUPLEX WIRELESS METHOD AND APPARATUS - A full duplex wireless system is employed for communicating data between an access point and a client. The full duplex wireless system includes a receive path configured to receive radio frequency data, including self interference, from an antenna and generates baseband output to a demodulator, the receive path includes a combiner that combines the received radio frequency with a self interference canceller path output to generate a combiner output. Further, a self interference tracking path is configured to receive the combiner output and to generate a self interference tracking path output, the self interference tracking path converts the combiner output to baseband and tracks the self-interference. Additionally, a self interference canceller path receives the self interference tracking path output and generates the self interference canceller path output that is at radio frequency (RF).
|APPARATUSES, SYSTEMS AND METHODS USING MULTI-FUNCTIONAL ANTENNAS INCORPORATING IN-LINE-FILTER ASSEMBLIES - Embodiments herein may provide an apparatus, comprising an antenna, the antenna including a same radiating element fed by more than one in-line-filter cables with complimentary pass and rejection bands, wherein the more than one in-line-filter cables have periodically inserted discontinuities in coaxial cables to create band rejection filter functionalities.
|SYSTEM AND METHOD OF DUPLEX WIRELESS AUDIO LINK OVER BROADCAST CHANNELS - A device and method of duplex audio communication over a broadcast channel are disclosed. Low-power transmission over a broadcast channel is permissible for personal use as long as the transmitted power level is below a level allowed by respective regulatory. For example, low-power FM transmitter can be used to provide a wireless audio link between two audio devices. One such application scenario is a wireless speakerphone used as an audio extension from a cellphone for group conference purposes. Such applications face issues of potential interference from other users of the same channel and the need of manually selecting and tuning a pair of channels. The device and method disclosed in the present invention use the clear channel technique to automatically select an un-occupied channel for the transmit side and utilizes an identification embedded in a sub-channel to allow the receiver to automatically tune to the channel used by the transmitter. The clear channels may be determined by respective transceivers or determined by a master transceiver.
|Radio access data terminal and system and method for implementing data communication thereof - The disclosure discloses a radio access data terminal and a system and a method for implementing data communications by the radio access data terminal, wherein the system comprises: the radio access data terminal, which is configured to process a downlink radio signal received by the radio access data terminal to obtain a downlink digital In-phase/Quadrature-phase (I/Q) signal, transmit the downlink digital I/Q signal to a general-purpose computer, and perform a bus protocol conversion on uplink digital information output by the general-purpose computer, modulate the converted signal and then transmit the modulated signal; and the general-purpose computer, which is configured to perform data service processing on the downlink digital I/Q signal received by a system bus and output uplink digital information which needs to be transmitted. Therefore, the disclosure can solve the problems of high power consumption and large heat dissipating capacity of an existing radio access data terminal and the resulting low utilization rate of a Central Processing Unit (CPU) of the general-purpose computer.
|RADIO COMMUNICATION TERMINAL - A mobile communication terminal (
|FILTER ARRANGEMENT - A filter arrangement for filtering a radio transmit signal and radio receive signal, comprising a first duplex filter and a second duplex filter, a signal divider for splitting a transmit input signal into a first transmitter signal portion and a second transmitter signal portion, the first transmitter signal portion being passed to the a transmit port of the first duplex-filter, and a second signal portion being passed to the second transmitter port of the second duplex filter. The filter arrangement further comprising a signal combiner/divider for combining a first filtered transmit portion signal and a second filtered transmit portion signal into a single filtered transmit signal. The filter arrangement further comprising a signal combiner for combining a first filtered receive signal portion and a second filtered receive signal portion into a single filtered receive signal, which is provided at a third output of the signal combiner. With such a filter arrangement the suppression of noise from the transmit signal in the receive signal is improved.
|Full Duplex Transmission Method for High Speed Backplane System - An integrated circuit (IC) for a backplane serializer/deserializer (SerDes) system, comprising a first transmitter configured to send first data at a data rate to a second receiver in a second IC, a first receiver configured to receive second data at the data rate from a second transmitter in the second IC, wherein each of a first link and a second link is to the first transmitter, the first receiver, the second transmitter, and the second receiver, and wherein both the first link and the second link combined are configured to transfer the first data from the first transmitter to the second receiver and transfer the second data from the second transmitter to the first receiver at the data rate.
|Wireless Terminals Including Smart Antenna Systems Having Multiple Antennas - A wireless communication device includes a transceiver configured for communication using multiple communication modes, the transceiver comprising a transmitter and a receiver. A plurality of antennas is coupled to the transceiver. The plurality of antennas includes a first antenna and a second antenna. The multiple communication modes include a multiple input multiple output ("MIMO") mode and a single antenna receive mode. The device further includes a control circuit configured to detect selection of the single antenna receive mode as an active one of the multiple communication modes and to automatically alter a configuration of the plurality of antennas and transceiver by configuring the first antenna as a transmit only antenna and the second antenna as a receive only antenna responsive to detection of the selection of the single antenna receive mode. Related methods of operation are also discussed.
|Method For Communication Via A Half-Duplex Radio Channel In A Radio Network - A communication method for a radio network, comprising at least two subscribers, wherein a radio channel is used in both directions among the subscribers, but only consecutively in the one and then in the other direction, i.e., not simultaneously in both directions. In accordance with the invention, the subscribers are each specified transmission times in a time period, at which either subscriber is permitted to send a user telegram to the other subscriber, where a detection signal is embedded at the beginning of each user telegram, or such a detection signal precedes the user telegram, and the embedded detection signal is used to notify the receiving subscriber of the assignment of the radio channel.
|Technique for Suppressing Noise in a Transmitter Device - A technique of suppressing noise in a transmitter device (
|WIRELESS COMMUNICATION HIGH-FREQUENCY CIRCUIT AND WIRELESS COMMUNICATION APPARATUS - A wireless communication high-frequency circuit in which a broadband amplifier is shared between multiple communication frequency bands and multiple duplexers are used in order to support the multiple communication frequency bands to improve the transmission efficiency includes a first impedance matching circuit between an output port of an amplifier and a relay switch. A first signal path extends from the output port of the amplifier to the ground in the first impedance matching circuit. An inductor and a variable capacitance element are provided on the first signal path. Second impedance matching circuits are provided between output ports and the input port of the relay switch and transmission signal input ports of duplexers, respectively.
|Implementation method and system, main control device and smart card for information transmission - An implementation method and system, main control device and smart card for information transmission are provided. The method includes: the smart card notifying the main control device of the operating mode supported thereby; the smart card receiving a clock frequency returned by the main control device, and if the main control device determines that the smart card can support an externally provided clock frequency, the clock frequency is a second clock frequency; judging whether the smart card itself can support the second clock frequency, and if true, the smart card and the main control device carrying out information transmission based on the clock control signal of the second clock frequency; otherwise the smart card carrying out the transmission based on the clock control signal of the first clock frequency, and the main control device carrying out the transmission based on the clock control signal of the second clock frequency.
|RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT WITH MATCHING CIRCUIT VOLTAGE DIVIDER - A front end circuit for coupling an antenna to a radio frequency (RF) transceiver for time domain duplex systems is disclosed. The front end circuit includes an antenna port, a power amplifier, a low noise amplifier, and a matching network. The output of the power amplifier and the input of the low noise amplifier are coupled to the matching network and connected in common to the antenna. The power amplifier and the low noise amplifier are activated and deactivated in sequence corresponding to the transmit and receive modes of the transceiver, and the matching network minimizes the effect that one has on the other at the designated operating frequency.
|MULTIPLE CONNECTION OPTIONS FOR A TRANSCEIVER - Apparatus, including a communication device which has two or more radio frequency (RF) ports for communicating in respective frequency bands. The apparatus also includes a substrate which has two or more interconnection ports, and which are respectively connected to the two or more RF ports of the communication device and are configured to couple a selected one of the RF ports to a duplexer operating at one of the respective frequency bands.
|VOICE DATA INTEGRATED MULTIACCESS BY SELF-RESERVATION AND CONTENTION ALGORITHM - Certain exemplary embodiments provide a method for providing multiple access to a communication channel, the method comprising: sending a reservation request of a first type into a first selected minislot of a selected frame of an uplink channel when information of a first type is to be sent, the uplink channel having a plurality of frames, each frame having a first selectable number of minislots and a second selectable number of slots, the reservation request of the first type requesting an assignment of at least one slot for transmitting information of the first type in at least one frame that is subsequent to the selected frame.
|Wireless Circuitry for Simultaneously Receiving Radio-frequency Transmissions in Different Frequency BandsAANM Lum; Nicholas W.AACI Santa ClaraAAST CAAACO USAAGP Lum; Nicholas W. Santa Clara CA USAANM Dimpflmaier; Ronald W.AACI Los GatosAAST CAAACO USAAGP Dimpflmaier; Ronald W. Los Gatos CA USAANM Sanguinetti; Louie J.AACI Los GatosAAST CAAACO USAAGP Sanguinetti; Louie J. Los Gatos CA US - An electronic device has wireless communications circuitry that includes transmitters and receivers. Antenna structures may be coupled to the transmitters and receivers to support radio-frequency signal transmission and radio-frequency signal reception operations. Switching circuitry such may be used to support multiple communications bands of interest. One or more low band receivers may be associated with the first switch and one or more high band receivers may be associated with the second switch. The switches can be configured in real time to switch a desired communications band into use. A diplexer may be used to simultaneously pass low bands to the first receiver and high bands to the second receiver. In this way, a data stream in the low band may be simultaneously received with a data stream in the high band.
|RF Front-End with On-Chip Transmitter/Receiver Isolation Using A Gyrator - An RF front-end with on-chip transmitter/receiver isolation using a gyrator is presented herein. The RF front end is configured to support full-duplex communication and includes a gyrator and a transformer. The gyrator includes two transistors that are configured to isolate the input of a low-noise amplifier (LNA) from the output of a power amplifier (PA). The gyrator is further configured to isolate the output of the PA from the input of the LNA. The gyrator is at least partially or fully capable of being integrated on silicon-based substrate.
|METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING INFORMATION FOR RANDOM ACCESS IN WIRELESS COMMUNICATION SYSTEM - A method and a Base Station (BS) of transmitting information for Random Access (RA) by a base station in a wireless communication system are provided. The BS generates RA information for beam alignment between the base station and each of a plurality of mobile terminals based on a number of reception beam forming patterns of the base station used for each of one or more RA channels and broadcasts the RA information to the plurality of mobile terminals. The RA information comprises information related to the number of reception beam forming patterns of the base station used for each of the one or more RA channels.
|BASE STATION DEVICE AND MOBILE COMMUNICATION METHOD - To reduce deterioration of a downlink signal when a multicarrier transmission is performed. A base station device eNB according to the present invention communication system includes: an uplink signal reception unit
|Acoustic Filter and Method of Acoustic Filter Manufacture - An acoustic filter and method of acoustic filter manufacture provides a plurality of series acoustic resonators coupled in series on a first resonator substrate, a plurality of shunt resonators on a second resonator substrate, and a support substrate. The first and second resonator substrates are mounted on the support substrate. The filter further provides a plurality of electrical connections, wherein each respective electrical connection electrically couples a respective one of the plurality of shunt resonators to a respective one of the plurality of series acoustic resonators.
|RF DUPLEXING DEVICE - Radio frequency (RF) duplexing devices and methods of operating the same are disclosed. In one embodiment, an RF duplexing device includes a transmission port, a receive port, a first duplexer, and a second duplexer. The first duplexer is coupled to the transmission port and the receive port, and is configured to provide a first phase shift from the transmission port to the receive port. The second duplexer is also coupled to the transmission port and the receive port. However, the second duplexer is configured to provide a second phase shift that is differential to the first phase shift from the transmission port to the receive port. By providing the second phase shift so that the second phase shift is differential to the first phase shift, the RF duplexing device can provide isolation through cancellation without needing to introduce significant insertion losses.
|Tunable Bandpass Filter Device and Method - An embodiment radio frequency MicroElectroMechanical (RF-MEMS) tunable bandpass filter includes one or more tunable resonators, each of which includes an electrically reconfigurable capacitor bank, a tuning screw, and a resonating structure. In an embodiment, the capacitor bank includes fixed value capacitors and switches to vary the capacitance of the resonator. In an embodiment, the capacitor bank includes variable capacitors and direct current (DC) bias circuits to vary the capacitance of the resonator. The filter may be incorporated into a time division duplexing (TDD) base station or other wireless communications device.
|DYNAMIC SPACE DIVISION DUPLEX (SDD) WIRELESS COMMUNICATIONS WITH MULTIPLE ANTENNAS USING SELF-INTERFERENCE CANCELLATION - A system and method to perform Full Duplex (FD) Space Division Duplex (SDD) communication using a Self-Interference Cancelling (SIC) precoder that applies different antenna phase shifts and amplitude scales to the transmitted signals to force them to be in the null space of the selected receive antennas. Thus, a wireless communication unit can place nulls at each of its receive antennas digitally at baseband for one or more frequency bands. The SIC precoder may be computed based on the self-interference channel from the transmit chain(s) to the receive chain(s). Different SIC precoders may be adaptively selected and stored digitally for different frequency bands. Subsequent single or multi-user precoder can be applied in concatenation with the SIC precoder to transmit signals to one or more users while receiving signals from one or more users simultaneously over the same frequency band.
|System and method for transmitter leak-over cancellation with closed loop optimization - The present disclosure relates generally to systems and methods for transmitter leak-over cancellation. In one example, a method includes transmitting a signal via a transmit chain in a wireless device, where a portion of the signal leaks over into a receive chain of the wireless device. A portion of the signal is diverted from the transmit chain into cancellation circuitry coupled to the receive chain to manipulate an amplitude and phase of the portion before combining the manipulated portion with the signal and other portion to at least partially cancel interference caused by the leak-over portion. After downconverting, a remainder portion is filtered from the received signal. A power level of the remainder portion is detected and compared to a threshold value. An amplitude and phase configuration of the cancellation circuitry is modified based on a result of comparing the power level to the threshold value.
|METHOD AND APPARATUS FOR PROVIDING SIGNALING OF REDUNDANCY - An approach is provided for efficient signaling of redundancy version information. A redundancy version signaling module detects the start of a system information radio transmission window and assigns a redundancy version sequence at the start of the transmission window.
|SIMULTANEOUS VOICE AND DATA COMMUNICATION - A wireless device configured for simultaneous voice and data communications is described. The wireless device includes a voice and data transceiver. The voice and data transceiver includes data path circuitry, voice path circuitry, a first multiplexer and a second multiplexer. The first multiplexer sends a primary data receive signal to the data path circuitry and receives a data transmit signal from the data path circuitry. The second multiplexer sends a diversity data receive signal to the data path circuitry, sends a voice receive signal to the voice path circuitry and receives a voice transmit signal from the voice path circuitry. The wireless device also includes a first antenna coupled to the first multiplexer. The wireless device further includes a second antenna coupled to the second multiplexer.
|Multiple-Input Multiple-Output Wireless Communications with Full Duplex Radios - An apparatus used in a full duplex multiple-input multiple-output (MIMO) wireless communications system is disclosed. In an aspect, the apparatus includes a plurality of antennas, each of which is connected to a combination of at least a TX (transmit) RF (radio frequency) chain and an RX (receive) RF chain. The plurality of antennas are split into one or more transmit antennas and one or more receive antennas, and the apparatus communicates with another apparatus. Other apparatuses and some methods for wireless communications also are disclosed.
|SINGLE CHANNEL FULL DUPLEX WIRELESS COMMUNICATION - A single channel full duplex wireless communication system includes a processor, a transmitter, a receiver, a secondary transmission path, a combining element, a primary transmission feedback path and a secondary transmission feedback path. The transmitter transmits a transmission signal via a transmission path. The receiver receives a received signal via a reception path. The transmitter and the receiver utilize one channel to transmit and receive signals. The transmission signal causes self-interference. The processor estimates a first transfer function and feeds the secondary transmission path with the transmission signal adjusted by the first transfer function to reduce the transmission signal leaked to the reception path. The combining element combines the transmission signal with the adjusted secondary transmission path signal to remove the self-interference. The primary transmission feedback path output is modified by a second transfer function. The secondary transmission feedback path output is modified by a third transfer function.
|Radio Transceiver With IM2 Mitigation - A structure and method to reduce second order intermodulation (IM2) of a receiver in a transceiver is provided. Specifically, the output of a detector in a transmit power control loop is utilized to calculate IM2 and the value is subtracted from a receive path to mitigate IM2 in a wireless communication devices. Alternatively, the detector can be placed in one or more receive paths to include receiver front-end passband variation.
|RADIO FRONT END AND POWER MANAGEMENT ARCHITECTURE FOR LTE-ADVANCED - A front end radio architecture (FERA) with power management is disclosed. The FERA includes a first power amplifier (PA) block having a first-first PA and a first-second PA, and a second PA block having a second-first PA and a second-second PA. First and second modulated switchers are adapted to selectively supply power to the first-first PA and the second-first PA, and to supply power to the first-second PA and the second-second PA, respectively. The first and second modulated switchers have a modulation bandwidth of at least 20 MHz and are both suitable for envelope tracking modulation. A control system is adapted to selectively enable and disable the first-first PA, first-second PA, the second-first PA, and the second-second PA. First and second switches are responsive to control signals to route carriers and received signals between first and second antennas depending upon a selectable mode of operation such as intra-band or inter-band operation.
|Broadband System and Method - A full duplex, broadband system for sparsely populated areas operating in the licensed VHF and UHF range of the electromagnetic spectrum provides service over an area of thousands of square kilometers from the base station.
|TUNABLE DUPLEXER ARCHITECTURE - A tunable radio frequency (RF) duplexer is disclosed. The tunable RF duplexer includes a first hybrid coupler, a second hybrid coupler, and an RF filter circuit. The first hybrid coupler is operable to split an RF receive input signal into first and second RF quadrature hybrid receive signals (QHRSs). The first hybrid coupler is also operable to split an RF transmission input signal into first and second RF quadrature hybrid transmission signals (QHTSs). The RF filter circuit is operable to pass the first and second RF QHRSs to the second hybrid coupler and to reflect the first and second RF QHTSs back to the first hybrid coupler. Additionally, the second hybrid coupler is configured to combine the first and second RF QHRSs into an RF receive output signal, while the first hybrid coupler is configured to combine the first and second RF QHTSs into an RF transmission output signal.
|TUNABLE HYBRID COUPLER - This disclosure includes embodiments of a tunable hybrid coupler. The tunable hybrid coupler includes a first inductive element having a first inductance, a second inductive element having a second inductance and mutually coupled to the first inductive element, a first variable capacitive element having a first variable capacitance, and a second variable capacitance having a second variable capacitance. The first variable capacitive element is coupled between a first port and a second port. The second variable capacitive element is coupled between a third port and a fourth port. The first inductive element is coupled from the first port to the third port, while the second inductive element is coupled from the second port to the fourth port. Accordingly, the tunable hybrid coupler may form an impedance matching network that is tunable to different RF communication bands. The tunable hybrid coupler may thus be included in a tunable RF duplexer.
|RF TRANSCEIVER WITH DISTRIBUTED FILTERING TOPOLOGY - This disclosure includes embodiments of a radio frequency (RF) transceiver having a distributed duplex filtering topology. The RF transceiver includes a power amplifier and a tunable RF duplexer. The tunable RF duplexer is configured to input an RF transmission input signal from the power amplifier, generate an RF transmission output signal that operates within an RF transmission band in response to the RF transmission input signal from the power amplifier, and simultaneously output the RF transmission output signal to an antenna and input an RF receive input signal that operates within an RF receive band from the antenna. The power amplifier includes a plurality of RF amplifier stages coupled in cascode and an RF filter coupled between a first one of the RF amplifier stages and a second one of the RF amplifier stages. Accordingly, the RF filter is configured to provide tuning within the RF receive band.
|Communication System and Method for Transmitting and Receiving Signals - A communication system transmits signals having frequencies that lie within a transmission band and receives signals having frequencies that lie within a reception band. The system includes a duplexer and an antenna. The duplexer includes a transmission branch and a reception branch. The transmission branch includes a transmission filter, a transmission phase shifting network and a transmission matching network. The reception branch includes a reception filter, a reception phase shifting network and a reception matching network. The transmission matching network and the reception matching network have predominately constant phase shifts over frequencies within the reception band and within the transmission band, respectively. The antenna is coupled to the transmission matching network and to the reception matching network, and shows a predominantly reactance-only impedance variation over frequencies in the transmission band and over frequencies in the reception band.
Patent applications in class Communication over free space
Patent applications in all subclasses Communication over free space

subset: commoncrawl