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1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.2 Closed loop power control in the uplink | Closed loop power control in the Uplink is the ability of the UE transmitter to adjust its output power in accordance with one or more TPC commands received in the downlink. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.2.1 Power control steps | The power control step is the change in the UE transmitter output power in response to a single TPC command, TPC_cmd, arrived at the UE. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.2.1.1 Minimum requirement | The UE transmitter shall have the capability of changing the output power with a step size of 1, 2 and 3 dB according to the value of TPC or RP-TPC, in the slot immediately after the TPC_cmd can be arrived.
a) The transmitter output power step due to closed loop power control shall be within the range shown in Table 5.2
b) The transmitter average output power step due to closed loop power control shall be within the range shown in Table 5.3. Here a TPC_cmd group is a set of TPC_cmd values derived from a corresponding sequence of TPC commands of the same duration.
The closed loop power is defined as the relative power differences between averaged power of original (reference) timeslot and averaged power of the target timeslot without transient duration. They are measured with a filter that has a Root-Raised Cosine (RRC) filter response with a roll off and a bandwidth equal to the chip rate.
Table 5.2: Transmitter power control range
TPC_ cmd
Transmitter power control range
1 dB step size
2 dB step size
3 dB step size
Lower
Upper
Lower
Upper
Lower
Upper
Up
+0.5 dB
+1.5 dB
+1 dB
+3 dB
+1.5 dB
+4.5 dB
Down
-0.5 dB
-1.5 dB
-1 dB
-3 dB
-1.5 dB
-4.5 dB
Table 5.3: Transmitter average power control range
TPC_ cmd group
Transmitter power control range after 10 equal TPC_ cmd groups
1 dB step size
2 dB step size
3 dB step size
Lower
Upper
Lower
Upper
Lower
Upper
Up
+8 dB
+12 dB
+16 dB
+24 dB
+24 dB
+36 dB
Down
-8 dB
-12 dB
-16 dB
-24 dB
-24 dB
-36 dB |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.3 Minimum transmit output power | The minimum controlled output power of the UE is when the power control setting is set to a minimum value. This is when both the closed loop and open loop power control indicate a minimum transmit output power is required. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.3.1 Minimum requirement | The minimum transmit power is defined as an averaged power in a time slot measured with a filter that has a Root-Raised Cosine (RRC) filter response with a roll off and a bandwidth equal to the chip rate. The minimum transmit power shall be better than –49 dBm/1.28MHz. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.3.2 Rationale | For the power control issue, the open loop and closed loop power control procedure is introduced in 1.28 Mcps TDD option [4], basically has the similar requirements as that of UTRA FDD.
The minimum transmit output power is basically kept in line with 3.84 Mcps TDD mode, just considering the RRC measurement filter bandwidth is 1/3 of 3.84 Mcps TDD mode, so the figure is scaleable change accordingly. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.4 Out-of-synchronisation handling of output power | The UE shall monitor the DPCH quality in order to detect a loss of the signal on Layer 1. The thresholds Qout and Qin specify at what DPCH quality levels the UE shall shut its power off and when it may turn its transmitter on, respectively. The thresholds are not defined explicitly, but are defined by the conditions under which the UE shall shut its transmitter off and turn it on, as stated in this clause. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.4.1 Requirement | The parameters in Table 5.4 are defined using the DL reference measurement channel (12.2) kbps specified in Annex C.2.1, where the CRC bits are replaced by data bits, and with static propagation conditions.
Table 5.4: DCH parameters for test of Out-of-synch handling
Parameter
Unit
Value
dB
-1
dBm/1.28 MHz
-60
dB
See figure 1
Information Data Rate
kbps
12.2
TFCI
-
On
The conditions for when the UE shall shut its transmitter on and when it shall turn it on are defined by the parameters in Table 5.4 together with the DPCH power level as defined in Figure 5.1.
Figure 5.1: Conditions for out-of-synch handling in the UE.
The indicated thresholds Qout andQin are only informative.
The requirements for the UE are that
- The UE shall not shut its transmitter off before point B.
- The UE shall shut its transmitter off before point C, which is Toff = 200 ms after point B
- The UE shall not turn its transmitter on between points C and E.
- The UE shall turn its transmitter on before point F, which is Ton = 200 ms after Point E. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.4.2 Rationale | A test procedure was introduced for the case of testing the UE ability to shut down its power if the received power is bellow a certain limit. The power will be varied at the input of the 3.84 Mcps TDD Option UE according to the following figure:
Figure 5.2: Conditions for out-of-synch handling in the 3.84 Mcps TDD Option UE.
The indicated thresholds Qout andQin are only informative.
This entry point of the power is the sensitivity limit of the 3.84 Mcps TDD Option UE. According to the link level simulations in TR25.942 [6] the UE needs a IOR/IOC=0.4dB (-1.6dB+2dB margin) at DPCH_EC/IOR=-6dB for the required performance in case of 12.2kBit/sec service and AWGN propagation. That means also that the required DPCH_EC/IOC=-5.6dB. In the testcase of “out-of-sync handling” the test shall be carried out with IOR/IOC= -1dB. That means if the UE shall operate at the same BER limit described above the DPCH_EC/IOR shall be –4.6 dB. (DPCH_EC/IOR = (DPCH_EC/IOC)*( IOC/IOR )=-5.6db+1dB=-4.6dB).
Doing the same calculations for the 1.28 Mcps TDD Option UE, the required IOR/IOC=3.2dB (1.2dB+2dB margin) at DPCH_EC/IOR=-7dB. That means also that the required DPCH_EC/IOC=-3.8dB. Setting the IOR/IOC= -1dB for the test case the required DPCH_EC/IOR= (DPCH_EC/IOC)*( IOC/IOR )=-3.8db+1dB= -2.8dB. That is the entry point in the test case for the 1.28 Mcps TDD Option UE. A –2.6dB will be proposed for this entry point level to have a convenient scaling level from 3.84 Mcps TDD Option to 1.28 Mcps TDD Option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5 Transmit ON/OFF power | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.1 Transmit OFF power | The transmit OFF power state is when the UE does not transmit. This parameter is defined as the maximum output transmit power within the channel bandwidth when the transmitter is OFF. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.1.1 Minimum Requirement | The requirement for transmit OFF power shall be better than 65dBm measured with a filter that has a Root-Raised Cosine (RRC) filter response with a roll off =0.22 and a bandwidth equal to the chip rate. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.1.2 Rational | In TDD mode, various users are transmitting and receiving on the same frequency band. A maximum transmit output power in the transmitter idle mode has to be defined not to affect other nearby receiving mobiles or BSs. Then received power due to a near by UE has to be required below the noise floor.
The maximum acceptable transmit off power level can be represented as follows
Transmit off power level [dBm] < -174 [dBm/Hz] + 10log(1.28M[Hz]) +NF+MCL,
Assuming a minimum coupling loss (MCL) of 40dB between mobiles and a noise figure (NF) of 9dB for the UE, then we can get:
Transmit off power level [dBm] < -113 +9+40=-64dBm,
I.e., the transmit off power level has to be below 64dBm.
A selected value of –65 dBm leads to minor degradation in the receiver sensitivity, and also leads to well compatible with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2 Transmit ON/OFF Time mask | The time mask transmit ON/OFF defines the tramping time allowed for the UE between transmit OFF power and transmit ON power. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.1 Minimum Requirement | The transmit power level versus time shall meet the mask specified in figure 5.3, where the transmission period refers to the burst without guard period for a single transmission slot, and to the period from the beginning of the burst in the first transmission slot to the end of the burst without guard period in the last transmission timeslot for consecutive transmission slots.
Figure 5.3: Transmit ON/OFF template |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.1 Rationales | A time mask should be included for relevant UE transmit power on/off scenarios. Requirements should be specified to limit impact on system performance and allow reasonable implementation.
To limit impact on the system performance, the time allowed for ramping should be small compared to the time period of continuous transmission. From implementation point of view ramping time should be as long as possible. Shorter ramping time will introduce more ripples in output power.
Depending on the size of a TDD cell it is required for the received signals from different users at the Node B be advanced in timing.
As described, there are four key parameters that have to be taken into account when specifying transmit time mask, especially when considering ramping during a guard period. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.1.1 Timing advance | For large cells, the timing advance is necessary, otherwise channel estimation will not work properly. Currently, a cell radius of having 8.7km for rural/macro case is assumed for illustration. This corresponds to round trip delay of 58s. 29us for timing advance is expected.. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.2 Switching time | Based on state-of-art semiconductor technology, about 10us of switching time could be expected to easy to handle and implementation in UE side. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.3 Delay spread | Under typical urban fading conditions, delay spread is mostly not greater than 3.125s (4chips) |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.4 BS Synchronization accuracy | The timing error of BSs synchronized to each other shall be less than 3.125us (4chips)
The figure 5.4 illustrates a situation,
Figure 5.4: Cell with timing advance
Based on above analysis and consideration, the 13chips(10us) period in 1.28 Mcps TDD UE is feasible for ramp up.
Considering the easy implementation aspects, a 20chips(about 15us) transient time is considered for ramp up when transmitter on.
For the ramp down transition in 1.28 Mcps TDD, the BS Synchronization error should be considered, there are 12chips(12.5-3.125=9.375us) period is proposed for TX ramp down. It is reasonable to implementation based on the state-of-art semiconductor level. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6 Output RF spectrum emissions | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.1 Occupied bandwidth | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.1.1 Description | Occupied bandwidth is a measure of the bandwidth containing 99% of the total integrated power for transmitted spectrum and is centered on the assigned channel frequency. The occupied channel bandwidth is about 1.6 MHz based on a chip rate of 1.28 Mcps. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.1.2 Explanation of difference | In 3.84 Mcps TDD, the occupied channel bandwidth is less than 5MHz based on 3.84 Mcps.
But in 1.28 Mcps TDD, as the background analysis in WG4#12 Meeting Tdoc515, which has been accepted to into the TR25.945, the occupied channel bandwidth should be less than 1.6 MHz based on 1.28 Mcps. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.2 Out of band emission | Out of band emissions are unwanted emissions immediately outside the nominal channel resulting from the modulation process and non-linearity in the transmitter but excluding spurious emissions. This out of band emission limit is specified in terms of a spectrum emission mask and adjacent channel power ratio. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.2.1 Spectrum emission mask | The spectrum emission mask of the UE applies to frequencies, which are between 0.8 and 4.0MHz from a carrier frequency. The out of channel emission is specified relative to the UE output power in measured in a 1.28 MHz bandwidth. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.2.1.1 Minimum Requirement | The power of any UE emission shall not exceed the levels specified in Table 5.5.
Table 5.5: Spectrum Emission Mask Requirement (1.28 Mcps chip rate option)
Frequency offset from carrier Δf
Minimum requirement
Measurement bandwidth
0.8 MHz
-35 dBc
30 kHz
0.8-1.8 MHz
-35 – 14*(f-0.8) dBc
30 kHz
1.8-2.4 MHz
-49 – 17*(f-1.8)dBc
30 kHz
2.4 – 4.0MHz
-44 dBc
1MHz
NOTES: The first and last measurement position with a 30 kHz filter is 0.815 MHz and 2.385 MHz
The first and last measurement position with a 1 MHz filter is 2.9MHz and 3.5MHz
The lower limit shall be -55dBm/1.28 MHz or which ever is the higher.
Fig 5.5 Proposed spectrum emission mask measured in 30kHz bandwidth |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.2.1.2 Rationale | Based on the discussion, the mask in Table 5.6 is proposed for power class 5 (21 dBm), given in dBc compared with 21dBm/1.28MHz. The rationale for each specification point is outlined in the table together with the proposed mask and the corresponding mask values, measured in 30 kHz (the smallest measurement bandwidth used):
Table 5.6: Proposed spectrum emission mask values and rationale.
Frequency offset
f
Minimum requirement (whichever is lower)
Measurement bandwidth
Comments for rationale
Corresponding value in 30 kHz
0,8 MHz
(-14 dBm)
-35 dBc
30 kHz
Based on FCC part 24:
-13 dBm/14,6 kHz ;
And 1,28 Mcps TDD emission specification 1)
-35 dBc
0,8 - 1,8 MHz
-35 - 14*(f-0.8) dBc
30 kHz
Dropping linearly from 0,8 to 1 MHz 2)
1,8 MHz
(-28 dBm)
-49 dBc
30 kHz
Based on FCC part 24:
-13 dBm/1 MHz
-49 dBc
1,8 - 2,4 MHz
-49 - 17*(f-1.8) dBc
30 kHz3)
Based on ACLR @1,6 MHz
-33 dBc/1,28 MHz for 21 dBm UE 4)
2,4 - 4,0 MHz
(-28 dBm)
-44 dBc
1 MHz
Based on ACLR @3,2 MHz
-43 dBc/1,28 MHz for 21 dBm UE
-59.2 dBc |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.2.1.2.1 Frequency offset | In FCC, frequency offset reference is the allocated band edge. Since spectrum definition has to be independent of operator allocation, the reference has been changed to the center frequency of the measured carrier. Assuming that the nominal carrier spacing is 1.6MHz for low chip rate TDD option, so spectrum mask definition starts at 0.8MHz offset. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.2.1.2.2 Measurement bandwidth | The "-26dB modulation bandwidth" is approximately equal to 1.46MHz in low chip rate option. This leads to 14.6kHz-measurement bandwidth. Since this value is not available in most measurement devices such as spectrum analyzers, a standard value of 30kHz was adopted. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.2.1.2.3 Mask shape | 1) According to FCC rules, the emission should be –13dBm/14.6kHz or –10dBm/30kHz. But in accordance with the 3.84 Mcps TDD emission only –14dBm is allowed to have no more ‘dBm/Hz power‘ in the adjacent band as the 3.84 Mcps TDD has. (Because the physical origin of the modulation side band is the same in both cases the level of the leakage power should also be the same.)
2) The level of the slope from 0.8MHz to 1.8 MHz has been set in order to maintain a monotonic requirement around the 1.8MHz offset where the measurement bandwidth changes from 30kHz to 1MHz.
3) Based on FCC rules, after 1MHz offset (1.8MHz frequency point here) from the allocated frequency band edge, the measurement bandwidth should be 1MHz then, but considering that from 1.8MHz to 2.4MHz (2nd carrier band limit) only 0.6MHz, it is less than 1MHz. Thus we change back to 30kHz so that it could be reasonable to measurement.
4) Based on the [email protected] requirement, the emission value is tighter than that of the FCC rules, therefore the tighter value has been deployed in the table. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.2.2 Adjacent Channel Leakage power Ratio (ACLR) | Adjacent Channel Leakage power Ratio (ACLR) is the ratio of the transmitted power to the power measured in an adjacent channels. Both the transmitted power and the adjacent channel power are measured with a filter response that has a Root-Raised Cosine (RRC) filter response with roll-off = 0.22 and a bandwidth equal to the chip rate.
If the adjacent power is greater than -55dBm then the ACLR shall be better then the values specified in the following Table.
Table 5.7: UE ACLR (1.28 Mcps chip rate)
Power Class
UE channel
ACLR limit
21dBm
± 1.6 MHz
33 dB
21dBm
± 3.2 MHz
43 dB
Notes: The requirement shall still be met in the presence of switching transients.
The ACLR requirements reflect what can be achieved with present state of the art technology.
Requirement on the UE shall be reconsidered when the state of the art technology progresses. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.3 Spurious emissions | Spurious emissions are emissions which are caused by unwanted transmitter effects such as harmonics emission, parasitic emission, intermodulation products and frequency conversion products, but exclude out of band emissions.
The frequency boundary and the detailed transitions of the limits between the requirement for out band emissions and spectrum emissions are based on ITU-R Recommendations SM.329 [16]. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.3.1 Minimum Requirement | These requirements are only applicable for frequencies which are greater than 4 MHz away from the UE center carrier frequency.
Table 5.8 : General Spurious emissions requirements
Frequency Bandwidth
Resolution Bandwidth
Minimum requirement
9 kHz f < 150 kHz
1 kHz
-36 dBm
150 kHz f < 30 MHz
10 kHz
-36 dBm
30 MHz f < 1000 MHz
100 kHz
-36 dBm
1 GHz f < 12.75 GHz
1 MHz
-30 dBm
Table 5.9: Additional Spurious emissions requirements
Frequency Bandwidth
Resolution Bandwidth
Minimum requirement
925 MHz f 935 MHz
100 KHz
-67 dBm*
935 MHz < f 960 MHz
100 KHz
-79 dBm*
1805 MHz f 1880 MHz
100 KHz
-71 dBm*
NOTE *: The measurements are made on frequencies which are integer multiples of 200 kHz. As exceptions, up to five measurements with a level up to the applicable requirements defined in Table 5.10 are permitted for each UARFCN used in the measurement. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6.3.2 Explanation of difference | The UE TX Spurious emissions requirements basically keep in line with UTRAN FDD and 3.84 Mcps TDD.
For the frequency offset, as ITU specification SM.329 [16] , the frequency limit between out of band emissions and spurious emissions is defined as 250% of the necessary bandwidth. In 1.28 Mcps option the necessary bandwidth is 1.6MHz, so the frequency offset from carrier frequency is |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.7 Transmit intermodulation | The transmit intermodulation performance is a measure of the capability of the transmitter to inhibit the generation of signals in its non linear elements caused by presence of the wanted signal and an interfering signal reaching the transmitter via the antenna. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.7.1 Minimum requirements | User Equipment(s) transmitting in close vicinity of each other can produce intermodulation products, which can fall into the UE, or BS receive band as an unwanted interfering signal. The UE intermodulation attenuation is defined by the ratio of the output power of the wanted signal to the output power of the intermodulation product when an interfering CW signal is added at a level below the wanted signal. Both the wanted signal power and the intermodulation product power are measured with a filter response that is root-raised cosine (RRC) with roll-off =0.22 and with a bandwidth equal to the chip rate.
For the 1.28 Mcps chip rate option, the requirement of transmitting intermodulation for carrier spacing 1.6MHz is prescribed in the following table.
Table 5.10: Transmitting intermodulation attenuation.
Interference signal frequency offset
1.6MHz
3.2MHz
Interference signal level
-40dBc
Minimum requirement of intermodulation products
-31 dBc
-41 dBc
Note: This requirement is applicable to the 21 dBm power class of UE. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.8 Transmit Modulation | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.8.1 Transmit pulse shape filter | The transmit pulse-shaping filter is a root-raised cosine (RRC) with roll-off =0.22 in the frequency domain. The impulse response of the chip impulse filter RC0(t) is
Where the roll-off factor =0.22 and the chip duration: |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.8.2 Error Vector Magnitude | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.8.2.1 Minimum Requirement | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.8.3 Peak Code Domain Error | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.8.3.1 Minimum Requirement | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.8.3.1 Rationale | For 3.84 Mcps and FDD, the minimum requirements for the error vector magnitude and peak code domain error ensures that:
- the error vector magnitude does not degrade the performance
- the error vector magnitude leads only to low increase for the transmitted output power to remain the Eb/N0
The theoretical investigations have shown that the error vector magnitude is related to the spreading factor. Because the same spreading factors are used for low chip rate TDD and for high chiprate TDD, the same minimum requirement applies. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3 Receiver characteristics | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.1 General | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.2 Diversity characteristics | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.3 Reference sensitivity level | The reference sensitivity is the minimum receiver input power measured at the antenna port at which the BIT Error Ratio BER does not exceed a specific value. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.3.1 Minimum Requirements | The BER shall not exceed 0.001 for the parameters specified in Table 5.11.
Table 5.11: Test parameters for reference sensitivity
Parameter
Level
Unit
0
dB
-108
dBm/1.28 MHz |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.3.2 Simulation results | The simulation is done to 12.2kb/s data in static propagation condition for UE of 1.28 Mcps TDD..The service-mapping is specified in ANNEX C, and the simulation assumption is specified in section 9.
Figure 5.6
Table 5.12
Îor/Ioc
Pb
-0.49
5.09E-2
-0.03
2.12E-2
0.41
8.11E-3
0.82
2.90E-3
1.25
8.12E-4
1.68
1.23E-4
1.95
2.61E-5 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.3.3 Rationale | the simulations has been made with =-7dB. That means that the reference sensitivity is PNoise+Noise-Figure+Îor/IocLimit-Own_Code_Power+Implementaion_Margin=-113dBm+9dB+1.2dB-7dB+2dB=-107.7dBm. Roughly -108dBm which is the defined reference sensitivity level. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.4 Maximum input level | This is defined as the maximum receiver input power at the UE antenna port which does not degrade the specified BER performance. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.4.1 Minimum Requirements | The BER shall not exceed 0.001 for the parameters specified in Table 5.13
Table 5.13: Maximum input level
Parameter
Level
Unit
-7
dB
-25
dBm/1.28 MHz |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.5 Adjacent Channel Selectivity (ACS) | Adjacent Channel Selectivity is a measure of a receiver’s ability to receive a wanted signal at its assigned channel frequency in the presence of adjacent channel signal at a given frequency offset from the centre frequency of the assigned channel. ACS is the ratio of the receive filter attenuation on the assigned channel frequency to the receiver filter attenuation on the adjacent channel(s). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.5.1 Minimum Requirement | The ACS shall be better than the value indicated in Table 5.14 for the test parameters specified in Table 5.15 where the BER shall not exceed 0.001
Table 5.14: Adjacent Channel Selectivity
Power Class
Unit
ACS
2
dB
33
3
dB
33
Table 5.15: Test parameters for Adjacent Channel Selectivity
Parameter
Unit
Level
dB
0
Îor
dBm/1.28MHz
-91
Ioac
dBm/1.28 MHz
-54
Fuw offset
MHz
+1.6 or –1.6 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.5.2 Rationale | The ACS performance of terminals is largely determined by an IF filter (usually a SAW), the A/D converter and digital baseband filtering. And the ACS requirements should reflect what can be achieved with present state of the art technology. So we can select the same receiver filter performance as 3.84 Mcps TDD, ACS equals to 33 dBc.
The wanted signal is set at –91dBm, just like that of 3.84 Mcps TDD, i.e., the wanted signal is 17dB above sensitivity level. Actually it has to be –94dBm to have the same distance to the reference sensitivity as the WTDD UE has. But the impact is neglegable. In that case the signal is large enough compared to the noise. Which means in turn that the impact of the noise can be neglected and only the filter characteristic will be taken into consideration which is the intention with that test case.
Then the unwanted adjacent level could be derived as below:
PI ≤ sensitivity [dBm] + 17dB (because the wanted signal is 17dB above the sensitivity) + ACS + 6dB (interference could be 6dB higher for the required BER as the wanted signal: see reference sensitivity) - 2dB (implementation margin) = -54dBm. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.6 Blocking characteristics | The blocking characteristics is a measure of the receiver ability to receive a wanted signal at its assigned channel frequency in the presence of an unwanted interferer on frequencies other than those of the spurious response or the adjacent channels without this unwanted input signal causing a degradation of the performance of the receiver beyond a specified limit. The blocking performance shall apply at all frequencies except those at which a spurious response occur. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.6.1 Minimum Requirement | The BER shall not exceed 0.001 for the parameters specified in table5.16 and table 5.17. For table 5.17 up to 24 exceptions are allowed for spurious response frequencies in each assigned frequency channel when measured using a 1MHz step size.
Table 5.16: In-band blocking
Parameter
Offset
Offset
Unit
Wanted Signal Level
<REFSENS> + 3 dB
<REFSENS> + 3 dB
dBm/1.28 MHz
Unwanted Signal Level (modulated)
-61
-49
dBm/1.28 MHz
Fuw (offset)
+3.2 or –3.2
+4.8 or –4.8
MHz
Table 5.17: Out of band blocking
Parameter
Band 1
Band 2
Band 3
Unit
Wanted Signal Level
<REFSENS> + 3 dB
<REFSENS> + 3 dB
<REFSENS> + 3 dB
dBm/1.28 MHz
Unwanted Signal Level (CW)
-44
-30
-15
dBm
Fuw
For operation in frequency bands as definded in subclause 5.2(a)
1840 <f <1895.2
1924.8 <f <2005.2
2029.8 <f <2085
1815 <f <1840
2085 <f <2110
1< f <1815
2110< f <12750
MHz
Fuw
For operation in frequency bands as definded in subclause 5.2(b)
1790 < f < 1845.2
1994.8 < f < 2050
1765 < f < 1790
2050 < f < 2075
1 < f < 1765
2075 < f < 12750
MHz
Fuw
For operation in frequency bands as definded in subclause 5.2(c)
1850 < f < 1905.2
1934.8 < f < 1990
1825 < f < 1850
1990 < f < 2015
1 < f < 1825
2015 < f < 12750
MHz
NOTE: For operation referenced in 5.1.2(a), from 1895.2 <f< 1900 MHz, 1920 <f< 1924.8 MHz, 2005.2 <f< 2010 MHz and 2025<f< 2029.8 MHz , the appropriate in-band blocking or adjacent channel selectivity in section 5.3.5.1shall be applied.
For operation referenced in 5.1.2(b), from 1845.2 < f < 1850 MHz and 1990< f < 1994.8 MHz, the appropriate in-band blocking or adjacent channel selectivity in section 5.3.5.1 shall be applied.
For operation referenced in 5.1.2(c), from 1905.2 < f < 1910 MHz and 1930< f < 1934.8 MHz, the appropriate in-band blocking or adjacent channel selectivity in section 5.3.5.1 shall be applied. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.6.2 Rationale | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.6.2.1 3.2 MHz blocking requirement | From [17,18] the required interfering signal level can be calculated, just like FDD (which is of course true only if the wanted signal is 3dB above the reference level), |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.6.2.2 ACS, Adjacent channel selectivity and NF, Noise figure | In the equations above, the ACS2 is assumed as 43dB, and NF is assumed as 9dB. The principle is basically like FDD and 3.84 Mcps TDD, just the chiprate has been changed, so the in band blocking value is also scalable changed.
Considering the chiprate is 1.28 Mcps, so the unwanted signal frequency offset is also scalable changed from 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.6.2.3 Out of band blocking requirement | The relevant frequency bands for out of band blocking are calculated according to the specified frequency bands for FDD in [19] and 3.84 Mcps TDD in [1]. The 3dB tougher requirement comparing to the WTDD/FDD is based on the assumption that the overall interference power is the same as in the other cases due to the same deployment scenarios. The NTDD UE has to withstand the same interference power as the WTDD/FD UE has to. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.7 Spurious response | Spurious response is a measure of the receiver’s ability to receive a wanted signal on its assigned channel frequency without exceeding a given degradation due to the presence of an unwanted CW interfering signal at any other frequency at which a response is obtained i.e. for which the blocking limit is not met. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.7.1 Minimum Requirements | For the 1.28 Mcps chip rate option, the requirement of Spurious response for carrier spacing 1.6MHz is prescribed in the following table.
Table 5.18: Spurious Response (1.28MHz chiprate)
Parameter
Level
Unit
Wanted Signal Level
<REFSENS> + 3 dB
dBm/1.28 MHz
Unwanted Signal Level (CW)
-44
dBm
Fuw
Spurious response frequencies
MHz |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.7.2 Rationale | The 3dB tougher requirement comparing to the WTDD/FDD is based on the assumption that the overall interference power is the same as in the other cases due to the same deployment scenarios. The NTDD UE has to withstand the same interference power as the WTDD/FD UE has to. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.8 Intermodulation characteristics | Third and higher order mixing of the two interfering RF signals can produce an interfering signal in the band of the desired channel. Intermodulation response rejection is a measure of the capability of the receiver to receiver a wanted signal on its assigned channel frequency in the presence of two or more interfering signals which have a specific frequency relationship to the wanted signal. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.8.1 Minimum Requirements | For the 1.28 Mcps chip rate option, the requirement of intermodulation for carrier spacing 1.6MHz is prescribed in the following table.
Table 5.19: Receive intermodulation characteristics (1.28MHz chiprate)
Parameter
Level
Unit
0
dB
Îor
<REFSENS> + 3 dB
dBm/1.28 MHz
Iouw1 (CW)
-46
dBm
Iouw2 (modulated)
-46
dBm/1.28 MHz
Fuw1 (CW)
3.2
MHz
Fuw2 (Modulated)
6.4
MHz |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.8.2 Rationale | The 3dB tougher requirement comparing to the WTDD/FDD is based on the assumption that the overall interference power is the same as in the other cases due to the same deployment scenarios. The NTDD UE has to withstand the same interference power as the WTDD/FD UE has to. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.9 Spurious emissions | The Spurious Emissions Power is the power of emissions generated or amplified in a receiver that appear at the UE antenna connector. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.9.1 Minimum Requirement | The power of any spurious emission shall not exceed:
Table 5.20: Receiver spurious emission requirements
Band
Maximum level
Measurement Bandwidth
Note
9 kHz – 1 GHz
-57 dBm
100 kHz
1 GHz – 1.9 GHz and
1.92 GHz – 2.01 GHz and
2.025 GHz – 2.11 GHz
-47 dBm
1 MHz
With the exception of frequencies between 4MHz below the first carrier frequency and 4MHz above the last carrier frequency used by the UE.
1.9 GHz – 1.92 GHz and
2.01 GHz – 2.025 GHz and
2.11 GHz – 2.170 GHz
-64 dBm
1.28 MHz
With the exception of frequencies between 4MHz below the first carrier frequency and 4MHz above the last carrier frequency used by the UE.
2.170 GHz – 12.75 GHz
-47 dBm
1 MHz |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.3.9.2 Rationale | The inband (Band 3 in the above table) RX spurious emission value could be conducted as below.
Assumptions:
- The Noise Figure (NF) of the UE receiver is 9dB;
- The MCL for UE’s is 40dB.
So the derivation is as follows:
Spurious level – MCL (Minimum Coupling Loss) < Thermal noise
Spurious level < Thermal noise + MCL = kTo + NF + MCL = –174dBm/Hz + 9dB + 40dB = –125dBm/Hz
In other way, in 1.28 Mcps TDD,
Spurious level < –64dBm/ 1.28MHz (= –125dBm/Hz)
The spurious levels in Band 1,2 and 4 are independent if the disturber is a FDD UE or aTDD UE. Therefore we propose to adopt these values for 1.28 Mcps TDD UE, just like 3.84 Mcps TDD UE.
The values of the 1.28 Mcps TDD UE receiver spurious levels from point 1 to 4 are proposed for approval for 1.28 Mcps TDD taking into account the impact of the TDD UE receiver spurious emission to the FDD UE receiver band.
For the frequency offset, as ITU specification, the frequency limit between out of band emissions and spurious emissions is defined as 250% of the necessary bandwidth. In 1.28 Mcps option the necessary bandwidth is 1.6MHz, so the frequency offset from carrier frequency is |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4 Performance requirement | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.1 General | The performance requirements for the UE in this section are specified for the measurement channels specified in Annex C and the propagation condition specified in Annex D.
Table 5.21: Summary of UE performance targets
Test Chs.
Information Data Rate
Static
Multi-path
Case 1
Multi-path
Case 2
Multi-path
Case 3
Performance metric
DCH
12.2 kbps
BLER<10-2
BLER<10-2
BLER<10-2
BLER<10-2
64 kbps
BLER<
10-1, 10-2
BLER<
10-1, 10-2
BLER<
10-1, 10-2
BLER<
10-1, 10-2, 10-3
144 kbps
BLER<
10-1, 10-2
BLER<
10-1, 10-2
BLER<
10-1, 10-2
BLER<
10-1, 10-2, 10-3
384 kbps
BLER<
10-1, 10-2
BLER<
10-1, 10-2
BLER<
10-1, 10-2
BLER<
10-1, 10-2, 10-3 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.2 Demodulation in static propagation conditions | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.2.1 Demodulation of DCH | The performance requirement of DCH in static propagation conditions is determined by the maximum Block Error Ratio (BLER). The BLER is specified for each individual data rate of the DCH. DCH is mapped into the Dedicated Physical Channel (DPCH). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.2.1.1 Minimum requirement | For the parameters specified in Table 5.22 the BLER should not exceed the piece-wise linear BLER curve specified in Table 5.23.
Table 5.22: DCH parameters in static propagation conditions
Parameters
Unit
Test 1
Test 2
Test 3
Test 4
Number of DPCHo
81)
2
2
0
dB
-101)
-10
-10
0
Ioc
dBm/1.28MHz
-60
Information Data Rate
Kbps
12.2
64
144
384 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.2.1.2 Rationale | The simulation will be carried out with ten codes and each has the same power (-10dB/code). The number of interfering signals are 8. That means that the number of own codes are 2 or other way round the relation between the number of own codes divided by the whole number of codes is 2/10 or –7dB. That is the correction factor for the Test1. The other test cases above and throughout the following subclauses can be explained on the same way.
Table 5.23: Performance requirements in AWGN channel.
Test Number
[dB]
BLER
1
3.1
10-2
2
2.1
10-1
2.4
10-2
3
2.5
10-1
2.8
10-2
4
2.8
10-1
3.0
10-2 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.3 Demodulation of DCH in multipath fading conditions | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.3.1 Multipath fading Case 1 | The performance requirement of DCH is determined by the maximum Block Error Ratio (BLER). The BLER is specified for each individual data rate of the DCH. DCH is mapped into the Dedicated Physical Channel (DPCH). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.3.1.1 Minimum requirement | For the parameters specified in Table 5.24 the BLER should not exceed the piece-wise linear BLER curve specified in Table 5.25.
Table 5.24: DCH parameters in multipath Case 1 channel
Parameters
Unit
Test 1
Test 2
Test 3
Test 4
Number of DPCHo
8
2
2
0
DB
-10
-10
-10
0
Ioc
dBm/1.28MHz
-60
Information Data Rate
Kbps
12.2
64
144
384
Table 5.25: Performance requirements in multipath Case 1 channel.
Test Number
[dB]
BLER
1
22.2
10-2
2
15.0
10-1
22.0
10-2
3
16.0
10-1
23.0
10-2
4
16.0
10-1
23.0
10-2 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.3.2 Multipath fading Case 2 | The performance requirement of DCH is determined by the maximum Block Error Ratio (BLER). The BLER is specified for each individual data rate of the DCH. DCH is mapped into the Dedicated Physical Channel (DPCH). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.3.2.1 Minimum requirement | For the parameters specified in Table 5.26 the BLER should not exceed the piece-wise linear BLER curve specified in Table 5.27.
Table 5.26: DCH parameters in multipath Case 2 channel
Parameters
Unit
Test 1
Test 2
Test 3
Test 4
Number of DPCHo
8
2
2
0
dB
-10
-10
-10
0
Ioc
dBm/1.28MHz
-60
Information Data Rate
Kbps
12.2
64
144
384
Table 5.27: Performance requirements in multipath Case 2 channel.
Test Number
[dB]
BLER
1
13.2
10-2
2
9.5
10-1
13.7
10-2
3
10.0
10-1
14.0
10-2
4
10.0
10-1
14.0
10-2 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.3.3 Multipath fading Case 3 | The performance requirement of DCH is determined by the maximum Block Error Ratio (BLER). The BLER is specified for each individual data rate of the DCH. DCH is mapped into the Dedicated Physical Channel (DPCH). |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.3.3.1 Minimum requirement | For the parameters specified in Table 5.28 the BLER should not exceed the piece-wise linear BLER curve specified in Table 5.29.
Table 5.28: DCH parameters in multipath Case 3 channel
Parameters
Unit
Test 1
Test 2
Test 3
Test 4
Number of DPCHo
8
2
2
0
dB
-10
-10
-10
0
Ioc
dBm/1.28MHz
-60
Information Data Rate
Kbps
12.2
64
144
384
Table 5.29: Performance requirements in multipath Case 3 channel.
Test Number
[dB]
BLER
1
10.8
10-2
2
8.3
10-1
11.1
10-2
13.8
10-3
3
8.7
10-1
10.6
10-2
11.8
10-3
4
8.8
10-1
10.3
10-2
11.5
10-3 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.4.3.4 Explanation difference | The different performance requirement is result from different propagation condition (Annex D), different service mapping (Annex C.2) ,different simulation assumption and different chip rate with 3.84 Mcps chip rate TDD.
The BCH test case, is testing the block STTD capability of the terminal. Block STTD is currently not supported by 1.28 Mcps chip rate TDD, as specified in TR 25.928. Therefore this test case is not needed for 1.28 Mcps chip rate TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6 BS radio transmission and reception | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1 Frequency bands and channel arrangement | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.1 General | The information presented in this section is based on a chip rate of 1.28 Mcps. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.2 Frequency bands | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.3 TX–RX frequency separation | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.3.1 Description | No TX-RX frequency separation is required as Time Division Duplex (TDD) is employed. Each subframe of 1.28 Mcps TDD consists of 7 main timeslots (TS0 ~ TS6) where TS0 (before DL to UL switching point) are always allocated DL, the timeslots (at least the first one) before the switching point (vice versa) are allocated UL and the timeslots after the switching point (vice versa) are allocated DL. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.3.2 Explanation of difference | The frame structure for 3.84 Mcps TDD and 1.28 Mcps TDD is different. For 3.84 Mcps TDD, each TDMA frame consists of 15 timeslots where each timeslot can be allocated to either transmit or receive. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.4 Channel arrangement | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.4.1 Channel spacing | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.4.1.1 Background | The chip rate is 1.28 Mcps with a roll-off factor of 0.22, therefore the occupied bandwidth is 1.6MHz.
It is just nominal for 1.6MHz, and it is also flexible to adjust the channel raster step 200kHz to narrow as 1.4MHz for strict requirement situations if needed. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.4.1.2 Channel spacing | The channel spacing for 1.28 Mcps chip rate option is 1.6MHz. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.4.2 Channel raster | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.1.4.3 Channel number | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.2 Transmitter characteristics | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 6.2.1 General | Common with 3.84 Mcps TDD option. |
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