Title of Invention: METHODS AND APPARATUS FOR POSITIONING REFERENCE SIGNAL MUTING FOR USER EQUIPMENT POSITIONING IN FULL DUPLEX SYSTEMS Abstract: A muting configuration for downlink positioning reference signals (PRS) is based on the slot type in which the PRS is transmitted. A slot type muting configuration mutes PRS if the PRS are transmitted in a full duplex slot, such as an in-band full duplex slot. If the PRS are transmitted in a sub-band full duplex slot, the PRS may be muted depending on whether the base station is capable of self-interference cancellation. The slot type muting configuration does not mute the PRS transmission in a half-duplex slot. The slot type muting configuration may be dynamic and may be provided to a user equipment (UE) in lower layer signaling to improve latency. The slot type muting configuration may be combined with other types of muting configurations, such as inter-instance muting, intra-instance muting, and intra-slot muting, e.g., using a logic function to combine the configurations. Detailed Description: CLAIM OF PRIORITY UNDER 35 U.S.C. § 119 This application claims under 35 USC § 119 the benefit of and priority to U.S. Provisional Application No. 63/076,845, filed Sep. 10, 2020, entitled “METHODS AND APPARATUS FOR POSITIONING REFERENCE SIGNAL MUTING FOR USER EQUIPMENT POSITIONING IN FULL DUPLEX SYSTEMS,” which is assigned to the assignee hereof and is incorporated herein by reference in its entirety. BACKGROUND Field Subject matter disclosed herein relates to positioning of user equipment using received positioning reference signals and more particularly to antenna adaptation for the user equipment based on the configuration of the positioning references signals. Information The location of a user equipment (UE), such as a cellular telephone, may be useful or essential to a number of applications including emergency calls, navigation, direction finding, asset tracking and Internet service. The location of a UE may be estimated based on information gathered from various systems. In a cellular network implemented according to 4G (also referred to as Fourth Generation) Long Term Evolution (LTE) radio access or 5G (also referred to as Fifth Generation) “New Radio” (NR), for example, a base station may transmit downlink reference signals that are used for positioning, such as a positioning reference signal (PRS). Assistance data is sent to a UE to assist in acquiring and measuring signals, and in some implementations, to compute a location estimate from the measurements. A UE may acquire PRSs transmitted from different base stations and perform positioning measurements such as Reference Signal Time Difference (RSTD), Reference Signal Received Power (RSRP), and reception and transmission (RX-TX) time difference measurements, which may be used in various positioning methods, such as Time Difference of Arrival (TDOA), Angle of Departure (AOD), and multi-cell Round Trip Time (RTT). The UE may compute an estimate of its own location using various positioning methods or may send the positioning measurements to a network entity, e.g., location server, which may compute the UE location based on the positioning measurements. Improvements in efficiency, e.g., power consumption and complexity, are desirable. SUMMARY A muting configuration for downlink positioning reference signals (PRS) is based on the slot type in which the PRS is transmitted. A slot type muting configuration mutes PRS if the PRS are transmitted in a full duplex slot, such as an in-band full duplex slot. If the PRS are transmitted in a sub-band full duplex slot, the PRS may be muted depending on whether the base station is capable of self-interference cancellation. The slot type muting configuration does not mute the PRS transmission in a half-duplex slot. The slot type muting configuration may be dynamic and may be provided to a user equipment (UE) in lower layer signaling to improve latency. The slot type muting configuration may be combined with other types of muting configurations, such as inter-instance muting, intra-instance muting, and intra-slot muting, e.g., using a logic function to combine the configurations. In one implementation, a method performed by a base station serving a user equipment (UE) in a wireless network for supporting positioning of the UE, includes receiving a schedule for positioning reference signals (PRS) to be transmitted in a plurality of slots, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception do not occur simultaneously; obtaining a muting configuration for the PRS in the plurality of slots, wherein the muting configuration is at least partially based on the slot type; and sending the muting configuration to the UE. In one implementation, a base station configured for supporting positioning of a user equipment (UE) in a wireless network, includes an external interface configured to communicate with entities in a wireless network; at least one memory; at least one processor coupled to the external interface and the at least one memory, wherein the at least one processor is configured to: receive a schedule for positioning reference signals (PRS) to be transmitted in a plurality of slots, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception do not occur simultaneously; obtain a muting configuration for the PRS in the plurality of slots, wherein the muting configuration is at least partially based on the slot type; and send the muting configuration to the UE. In one implementation, a base station serving configured for supporting positioning of a user equipment (UE) in a wireless network, includes means for receiving a schedule for positioning reference signals (PRS) to be transmitted in a plurality of slots, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception do not occur simultaneously; means for obtaining a muting configuration for the PRS in the plurality of slots, wherein the muting configuration is at least partially based on the slot type; and means for sending the muting configuration to the UE. In one implementation, a non-transitory storage medium including program code stored thereon, the program code is operable to configure at least one processor in a base station for supporting positioning of a user equipment (UE) in a wireless network, the program code comprising instructions to: receive a schedule for positioning reference signals (PRS) to be transmitted in a plurality of slots, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception do not occur simultaneously; obtain a muting configuration for the PRS in the plurality of slots, wherein the muting configuration is at least partially based on the slot type; and send the muting configuration to the UE. In one implementation, a method performed by a location server for supporting positioning of a user equipment (UE) in a wireless network, includes generating a schedule for positioning reference signal (PRS) to be transmitted by a base station in a plurality of slots, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception do not occur simultaneously; generating a muting configuration for the PRS in the plurality of slots for the base station, wherein the muting configuration is at least partially based on the slot type; sending the muting configuration to the base station; and sending the muting configuration to the UE. In one implementation, a location server configured for supporting positioning of a user equipment (UE) in a wireless network includes an external interface configured to communicate with entities in a wireless network; at least one memory; at least one processor coupled to the external interface and the at least one memory, wherein the at least one processor is configured to: generate a schedule for positioning reference signal (PRS) to be transmitted by a base station in a plurality of slots, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception do not occur simultaneously; generate a muting configuration for the PRS in the plurality of slots for the base station, wherein the muting configuration is at least partially based on the slot type; send the muting configuration to the base station; and send the muting configuration to the UE. In one implementation, a location server configured for supporting positioning of a user equipment (UE) in a wireless network, includes means for generating a schedule for positioning reference signal (PRS) to be transmitted by a base station in a plurality of slots, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception do not occur simultaneously; means for generating a muting configuration for the PRS in the plurality of slots for the base station, wherein the muting configuration is at least partially based on the slot type; means for sending the muting configuration to the base station; and means for sending the muting configuration to the UE. In one implementation, a non-transitory storage medium including program code stored thereon, the program code is operable to configure at least one processor in a location server for supporting positioning of a user equipment (UE) in a wireless network, the program code comprising instructions to: generate a schedule for positioning reference signal (PRS) to be transmitted by a base station in a plurality of slots, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception do not occur simultaneously; generate a muting configuration for the PRS in the plurality of slots for the base station, wherein the muting configuration is at least partially based on the slot type; send the muting configuration to the base station; and send the muting configuration to the UE. In one implementation, a method performed by a user equipment (UE) in a wireless network for supporting positioning of the UE, includes receiving a schedule for positioning reference signals (PRS) to be transmitted in a plurality of slots by a base station, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception by the base station occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception by the base station do not occur simultaneously; receiving a muting configuration for the PRS in the plurality of slots, wherein the muting configuration is at least partially based on the slot type; receiving the PRS from the base station using the muting configuration. In one implementation, a user equipment (UE) configured for supporting positioning of the UE in a wireless network, includes a wireless transceiver configured to wirelessly communicate with entities in a wireless network; at least one memory; at least one processor coupled to the wireless transceiver and the at least one memory, wherein the at least one processor is configured to: receive a schedule for positioning reference signals (PRS) to be transmitted in a plurality of slots by a base station, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception by the base station occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception by the base station do not occur simultaneously; receive a muting configuration for the PRS in the plurality of slots, wherein the muting configuration is at least partially based on the slot type; receive the PRS from the base station using the muting configuration. In one implementation, a user equipment (UE) in a wireless network configured for supporting positioning of the UE, includes means for receiving a schedule for positioning reference signals (PRS) to be transmitted in a plurality of slots by a base station, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception by the base station occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception by the base station do not occur simultaneously; means for receiving a muting configuration for the PRS in the plurality of slots, wherein the muting configuration is at least partially based on the slot type; and means for receiving the PRS from the base station using the muting configuration. In one implementation, a non-transitory storage medium including program code stored thereon, the program code is operable to configure at least one processor in a user equipment (UE) for supporting positioning of the UE in a wireless network, the program code comprising instructions to: receive a schedule for positioning reference signals (PRS) to be transmitted in a plurality of slots by a base station, wherein the plurality of slots has slot types comprising full duplex slots in which downlink transmissions and uplink reception by the base station occur simultaneously and half-duplex slots in which downlink transmissions and uplink reception by the base station do not occur simultaneously; receive a muting configuration for the PRS in the plurality of slots, wherein the muting configuration is at least partially based on the slot type; and receive the PRS from the base station using the muting configuration. Other objects and advantages associated with the aspects disclosed herein will be apparent to those skilled in the art based on the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are presented to aid in the description of various aspects of the disclosure and are provided solely for illustration of the aspects and not limitation thereof. FIG. 1A illustrates an exemplary wireless communications system, according to various aspects of the disclosure. FIG. 1B shows an architecture diagram of an NG-RAN node that includes a gNB Central Unit, a gNB Distributed Unit, and gNB Remote Unit. FIGS. 2A and 2B illustrate example wireless network structures, according to various aspects of the disclosure. FIG. 3 illustrates a block diagram of a design of base station and user equipment (UE), which may be one of the base stations and one of the UEs in FIG. 1. FIG. 4 shows a structure of an exemplary subframe sequence for a positioning reference signal (PRS). FIG. 5 illustrates a UE capable of receiving assistance data including a slot type based PRS muting configuration. FIG. 6 shows an example of a base station capable of providing assistance data including a slot type based PRS muting configuration. FIG. 7 shows a server capable of providing assistance data including a slot type based PRS muting configuration. FIG. 8 illustrates various possible patterns for DL PRS resources within a slot. FIG. 9 illustrates an example of an instance of a PRS resource set. FIG. 10 illustrates another example of an instance of a PRS resource set. FIG. 11 illustrates an example of an inter-instance PRS muting configuration. FIG. 12 illustrates an example of an intra-instance PRS muting configuration. FIG. 13 illustrates two instances of a PRS resource set with inter-instance PRS muting configuration and an intra-instance PRS muting configuration. FIGS. 14A and 14B illustrate examples of in-band full duplex (IBFD) communications, in which downlink and uplink signals are transmitted and received at the same time using the same frequency resources. FIG. 15 illustrates an example sub-band full duplex (SBFD) communications in which downlink and uplink signals are transmitted and received at the same time using different frequency resources. FIG. 16 illustrates half-duplex communications in which downlink and uplink signals are transmitted and received at the different times. FIG. 17 illustrates an environment including multiple base stations and UEs, in which a base station is subject to self-interference while operating in full duplex mode. FIG. 18 illustrates an environment including multiple base stations and UEs, in which a UE is subject to self-interference while operating in full duplex mode. FIG. 19A illustrates a base station communicating with a number of UEs. FIG. 19B illustrates examples of uplink signals and downlink signals transmitted between the base station and UEs from FIG. 19A in half-duplex and full duplex slots. FIG. 19C illustrates examples of DL PRS and uplink signals transmitted between the base station and UEs from FIG. 19A in half-duplex and full duplex slots. FIG. 20 illustrates two instances of a PRS resource set with a slot type PRS muting configuration, an inter-instance PRS muting configuration and an intra-instance PRS muting configuration. FIG. 21 illustrates one example of intra-slot PRS muting. FIG. 22 illustrates another example of intra-slot PRS muting. FIG. 23 illustrates two instances of a PRS resource set with a slot type PRS muting configuration, inter-slot PRS muting, an inter-instance PRS muting configuration and an intra-instance PRS muting configuration. FIG. 24 is a message flow illustrating the messaging for supporting positioning of the UE using slot type PRS muting. FIG. 25 shows a flowchart for an exemplary method for supporting positioning of a UE in a wireless network performed by a base station. FIG. 26 shows a flowchart for an exemplary method for supporting positioning of a UE in a wireless network performed by a location server. FIG. 27 shows a flowchart for an exemplary method for supporting positioning of a UE in a wireless network performed by a UE. DETAILED DESCRIPTION Aspects of the disclosure are provided in the following description and related drawings directed to various examples provided for illustration purposes. Alternate aspects may be devised without departing from the scope of the disclosure. Additionally, well-known elements of the disclosure will not be described in detail or will be omitted so as not to obscure the relevant details of the disclosure. The words “exemplary” and/or “example” are used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” and/or “example” is not necessarily to be construed as preferred or advantageous over other aspects. Likewise, the term “aspects of the disclosure” does not require that all aspects of the disclosure include the discussed feature, advantage or mode of operation. Those of skill in the art will appreciate that the information and signals described below may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description below may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof, depending in part on the particular application, in part on the desired design, in part on the corresponding technology, etc. Further, many aspects are described in terms of sequences of actions to be performed by, for example, elements of a computing device. It will be recognized that various actions described herein can be performed by specific circuits (e.g., application specific integrated circuits (ASICs)), by program instructions being executed by one or more processors, or by a combination of both. Additionally, the sequence(s) of actions described herein can be considered to be embodied entirely within any form of non-transitory computer-readable storage medium having stored therein a corresponding set of computer instructions that, upon execution, would cause or instruct an associated processor of a device to perform the functionality described herein. Thus, the various aspects of the disclosure may be embodied in a number of different forms, all of which have been contemplated to be within the scope of the claimed subject matter. In addition, for each of the aspects described herein, the corresponding form of any such aspects may be described herein as, for example, “logic configured to” perform the described action. As used herein, the terms “user equipment” (UE) and “base station” are not intended to be specific or otherwise limited to any particular Radio Access Technology (RAT), unless otherwise noted. In general, a UE may be any wireless communication device (e.g., a mobile phone, router, tablet computer, laptop computer, tracking device, wearable (e.g., smartwatch, glasses, augmented reality (AR)/virtual reality (VR) headset, etc.), vehicle (e.g., automobile, motorcycle, bicycle, etc.), Internet of Things (IoT) device, etc.) used by a user to communicate over a wireless communications network. A UE may be mobile or may (e.g., at certain times) be stationary, and may communicate with a Radio Access Network (RAN). As used herein, the term “UE” may be referred to interchangeably as an “access terminal” or “AT,” a “client device,” a “wireless device,” a “subscriber device,” a “subscriber terminal,” a “subscriber station,” a “user terminal” or UT, a “mobile terminal,” a “mobile station,” “mobile device,” or variations thereof. Generally, UEs can communicate with a core network via a RAN, and through the core network the UEs can be connected with external networks such as the Internet and with other UEs. Of course, other mechanisms of connecting to the core network and/or the Internet are also possible for the UEs, such as over wired access networks, wireless local area network (WLAN) networks (e.g., based on IEEE 802.11, etc.) and so on. A base station or transmission point or transmission reception point (TRP) may operate according to one of several RATs in communication with UEs depending on the network in which it is deployed, and may be alternatively referred to as an access point (AP), a network node, a NodeB, an evolved NodeB (eNB), a New Radio (NR) Node B (also referred to as a gNB or gNodeB), etc. In addition, in some systems a base station may provide purely edge node signaling functions while in other systems it may provide additional control and/or network management functions. A communication link through which UEs can send signals to a base station is called an uplink (UL) channel (e.g., a reverse traffic channel, a reverse control channel, an access channel, etc.). A communication link through which the base station can send signals to UEs is called a downlink (DL) or forward link channel (e.g., a paging channel, a control channel, a broadcast channel, a forward traffic channel, etc.). As used herein the term traffic channel (TCH) can refer to either an UL/reverse or DL/forward traffic channel. The term “base station” may refer to a single physical transmission point or to multiple physical transmission points that may or may not be co-located. For example, where the term “base station” refers to a single physical transmission point, the physical transmission point may be an antenna of the base station corresponding to a cell of the base station. Where the term “base station” refers to multiple co-located physical transmission points, the physical transmission points may be an array of antennas (e.g., as in a multiple-input multiple-output (MIMO) system or where the base station employs beamforming) of the base station. Where the term “base station” refers to multiple non-co-located physical transmission points, the physical transmission points may be a distributed antenna system (DAS) (a network of spatially separated antennas connected to a common source via a transport medium) or a remote radio head (RRH) (a remote base station connected to a serving base station). Alternatively, the non-co-located physical transmission points may be the serving base station receiving the measurement report from the UE and a neighbor base station whose reference radio frequency (RF) signals the UE is measuring. To support positioning of a UE, two broad classes of location solution have been defined: control plane and user plane. With control plane (CP) location, signaling related to positioning and support of positioning may be carried over existing network (and UE) interfaces and using existing protocols dedicated to the transfer of signaling. With user plane (UP) location, signaling related to positioning and support of positioning may be carried as part of other data using such protocols as the Internet Protocol (IP), Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). The Third Generation Partnership Project (3GPP) has defined control plane location solutions for UEs that use radio access according to Global System for Mobile communications GSM (2G), Universal Mobile Telecommunications System (UMTS) (3G), LTE (4G) and New Radio (NR) for Fifth Generation (5G). These solutions are defined in 3GPP Technical Specifications (TSs) 23.271 and 23.273 (common parts), 43.059 (GSM access), 25.305 (UMTS access), 36.305 (LTE access) and 38.305 (NR access). The Open Mobile Alliance (OMA) has similarly defined a UP location solution known as Secure User Plane Location (SUPL) which can be used to locate a UE accessing any of a number of radio interfaces that support IP packet access such as General Packet Radio Service (GPRS) with GSM, GPRS with UMTS, or IP access with LTE or NR. Both CP and UP location solutions may employ a location server to support positioning. The location server may be part of or accessible from a serving network or a home network for a UE or may simply be accessible over the Internet or over a local Intranet. If positioning of a UE is needed, a location server may instigate a session (e.g. a location session or a SUPL session) with the UE and coordinate location measurements by the UE and determination of an estimated location of the UE. During a location session, a location server may request positioning capabilities of the UE (or the UE may provide them to the location server without a request), may provide assistance data to the UE (e.g. if requested by the UE or in the absence of a request) and may request a location estimate or location measurements from a UE for various positioning techniques, e.g. for the Global Navigation Satellite System (GNSS), Time Difference of Arrival (TDOA), Angle of Departure (AOD), Round Trip Time (RTT) and multi cell RTT (Multi-RTT), and/or Enhanced Cell ID (ECID) position methods. Assistance data may be used by a UE to acquire and measure GNSS and/or reference signals, such as positioning reference signals (PRS) signals (e.g. by providing expected characteristics of these signals such as frequency, expected time of arrival, signal coding, signal Doppler). In a UE based mode of operation, assistance data may also or instead be used by a UE to help determine a location estimate from the resulting location measurements (e.g., if the assistance data provides satellite ephemeris data in the case of GNSS positioning or base station locations and other base station characteristics such as PRS timing in the case of terrestrial positioning using, e.g., TDOA, AOD, Multi-RTT, etc.). In a UE assisted mode of operation, a UE may return location measurements to a location server which may determine an estimated location of the UE based on these measurements and possibly based also on other known or configured data (e.g. satellite ephemeris data for GNSS location or base station characteristics including base station locations and possibly PRS timing in the case of terrestrial positioning using, e.g., TDOA, AOD, Multi-RTT, etc.). In another standalone mode of operation, a UE may make location related measurements without any positioning assistance data from a location server and may further compute a location or a change in location without any positioning assistance data from a location server. Position methods that may be used in a standalone mode include GPS and GNSS (e.g. if a UE obtains satellite orbital data from data broadcast by GPS and GNSS satellites themselves) as well as sensors. In the case of 3GPP CP location, a location server may be an enhanced serving mobile location center (E-SMLC) in the case of LTE access, a standalone SMLC (SAS) in the case of UMTS access, a serving mobile location center (SMLC) in the case of GSM access, or a Location Management Function (LMF) in the case of 5G NR access. In the case of OMA SUPL location, a location server may be a SUPL Location Platform (SLP) which may act as any of: (i) a home SLP (H-SLP) if in or associated with the home network of a UE or if providing a permanent subscription to a UE for location services; (ii) a discovered SLP (D-SLP) if in or associated with some other (non-home) network or if not associated with any network; (iii) an Emergency SLP (E-SLP) if supporting location for an emergency call instigated by the UE; or (iv) a visited SLP (V-SLP) if in or associated with a serving network or a current local area for a UE. During a location session, a location server and UE may exchange messages defined according to some positioning protocol in order to coordinate the determination of an estimated location. Possible positioning protocols may include, for example, the LTE Positioning Protocol (LPP) defined by 3GPP in 3GPP TS 36.355 and the LPP Extensions (LPPe) protocol defined by OMA in OMA TSs OMA-TS-LPPe-V1_0, OMA-TS-LPPe-V1_1 and OMA-TS-LPPe-V2_0. The LPP and LPPe protocols may be used in combination where an LPP message contains one embedded LPPe message. The combined LPP and LPPe protocols may be referred to as LPP/LPPe. LPP and LPP/LPPe may be used to help support the 3GPP control plane solution for LTE or NR access, in which case LPP or LPP/LPPe messages are exchanged between a UE and E-SMLC or between a UE and LMF. LPP or LPPe messages may be exchanged between a UE and E-SMLC via a serving Mobility Management Entity (MME) and a serving eNodeB for the UE. LPP or LPPe messages may also be exchanged between a UE and LMF via a serving Access and Mobility Management Function (AMF) and a serving NR Node B (gNB) for the UE. LPP and LPP/LPPe may also be used to help support the OMA SUPL solution for many types of wireless access that support IP messaging (such as LTE, NR and WiFi), where LPP or LPP/LPPe messages are exchanged between a SUPL Enabled Terminal (SET), which is the term used for a UE with SUPL, and an SLP, and may be transported within SUPL messages such as a SUPL POS or SUPL POS INIT message A location server and a base station (e.g. an eNodeB for LTE access) may exchange messages to enable the location server to (i) obtain position measurements for a particular UE from the base station, or (ii) obtain location information from the base station not related to a particular UE such as the location coordinates of an antenna for the base station, the cells (e.g. cell identities) supported by the base station, cell timing for the base station and/or parameters for signals transmitted by the base station such as PRS signals. In the case of LTE access, the LPP A (LPPa) protocol may be used to transfer such messages between a base station that is an eNodeB and a location server that is an E-SMLC. In the case of NR access, the NRPPA protocol may be used to transfer such messages between a base station that is a gNodeB and a location server that is an LMF. It is noted that the terms “parameter” and “information element” (IE) are synonymous and are used interchangeably herein. During positioning using signaling in LTE and 5G NR, a UE typically acquires a dedicated positioning signals transmitted by base stations, e.g., PRS, which are used to generate the desired measurements for the supported positioning technique. Positioning Reference Signals (PRS) are defined for 5G NR positioning to enable UEs to detect and measure more neighbour base stations or Transmission and Reception Points (TRPs). Several configurations are supported to enable a variety of deployments (indoor, outdoor, sub-6, mmW). To support PRS beam operation, beam sweeping is additionally supported for PRS. Table 1 below illustrates 3GPP release numbers (e.g., Re1.16 or Re1.15) that define particular reference signals for various UE measurements and the accompanying positioning techniques. TABLE 1 To facilitate support DL/UL Reference of the following Signals UE Measurements positioning techniques Rel.16 DL PRS DL RSTD DL-TDOA Rel.16 DL PRS DL PRS RSRP DL-TDOA, DL-AOD, Multi-RTT Rel.16 DL PRS/Rel.16 UE Rx-Tx time Multi-RTT SRS for positioning difference Rel. 15 SSB/CSI-RS for SS-RSRP(RSRP for E-CID RRM RRM), SS-RSRQ(for RRM), CSI-RSRP (for RRM), CSI-RSRQ (for RRM) In 5G NR, the base stations, i.e., gNBs, may transmit PRS resources in a beam-sweeping manner. In other words, the gNBs may use beamforming and transmit PRS resources in specific directions. A PRS resource set is a set of PRS resources used for the transmission of PRS signals. PRS resources may be repeated in a single instance for the PRS resource set. Base stations may operate in frequency division duplex (FDD) mode and time division duplex mode when transmitting PRS resources, e.g., transmitting PRS resources over multiple symbols and carrier frequencies to prevent overlap. Generally, PRS resources are transmitted with a constant power, but a PRS resource may also be transmitted with zero power (i.e., muted), to prevent overlap with other cells. Muting, which turns off a regularly scheduled PRS resource transmission, may be useful when PRS signals between different cells overlap by occurring at the same or almost the same time. In this case, the PRS signals from some cells may be muted while PRS signals from other cells are transmitted (e.g., at a constant power). Muting configurations including muting all PRS resources withing a selected PRS resource set instance (sometimes referred to as inter instance muting) or muting selected repetitions of the PRS resources within a PRS resource set instance (sometimes referred to as intra instance muting). Assistance data may be provided to the UE, which includes PRS configuration information, including muting information, to assist the UE in measuring the PRS resources. Base stations may use duplex communications to transmit downlink signals and receive uplink signals. For example, a base station may use full duplex communications in which the DL resource and UL resource share the same time and frequency resources, e.g., the base station transmits and receives on the same time and frequency resource (referred to as in-band full duplex), or the DL resource is transmitted at the same time as the UL resource but on a different frequency resource (sub-band full duplex). A base station may further transmit DL resources and receive UL resources at different times and on different frequency resources (half-duplex). Thus, DL PRS may be scheduled to be transmitted by a base station in a full duplex slot or a half-duplex shot. However, the DL PRS resources transmitted in a full duplex slot, particularly in-band full duplex, may cause self-interference with reception of UL signals. Accordingly, as described herein, a muting configuration may be used to mute PRS resources based on the slot type in which the PRS resource is scheduled. For example, the PRS resource may be muted in an in-band full duplex slot in which DL transmissions and UL reception occur simultaneously with the same frequency resources. If the PRS resource is scheduled in a sub-band full duplex slot, the PRS resource may be muted depending on the capability of the base station, e.g., if the base station cannot perform self-interference cancellation for UL signals received simultaneously with transmission of the PRS resources, the PRS resource may be muted. The muting configuration may be provided to the UE using lower layer signaling. For example, currently muting configurations are provided in higher layer messages, e.g., using LPP assistance data messages. In some implementations, the muting configuration may be provided in lower layers to enable low-latency configurations. The slot based PRS muting may be used in conjunction with other types of muting configurations, e.g., the inter instance muting or intra instance muting. For example, a logic function (such as an AND logic function) may be used to combine the muting configurations. In some implementations, other types of muting may additionally or alternatively be used, such as intra-slot muting, e.g., where selected symbols of a PRS resource may be muted. FIG. 1A illustrates an exemplary wireless communications system 100. The wireless communications system 100 (which may also be referred to as a wireless wide area network (WWAN)) may include various network nodes, including base stations and UEs. The base stations 102, sometimes referred to as TRPs 102, may include macro cell base stations (high power cellular base stations) and/or small cell base stations (low power cellular base stations). In an aspect, the macro cell base station may include eNBs where the wireless communications system 100 corresponds to an LTE network, or gNBs where the wireless communications system 100 corresponds to a 5G network, or a combination of both, and the small cell base stations may include femtocells, picocells, microcells, etc. The base stations 102 may collectively form a RAN and interface with a core network 170 (e.g., an evolved packet core (EPC) or next generation core (NGC)) through backhaul links 122, and through the core network 170 to one or more location servers 172. In addition to other functions, the base stations 102 may perform functions that relate to one or more of transferring user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, RAN sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations 102 may communicate with each other directly or indirectly (e.g., through the EPC/NGC) over backhaul links 134, which may be wired or wireless. The base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. In an aspect, one or more cells may be supported by a base station 102 in each coverage area 110. A “cell” is a logical communication entity used for communication with a base station (e.g., over some frequency resource, referred to as a carrier frequency, component carrier, carrier, band, or the like), and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID)) for distinguishing cells operating via the same or a different carrier frequency. In some cases, different cells may be configured according to different protocol types (e.g., machine-type communication (MTC), narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access for different types of UEs. In some cases, the term “cell” may also refer to a geographic coverage area of a base station (e.g., a sector), insofar as a carrier frequency can be detected and used for communication within some portion of geographic coverage areas 110. While neighboring macro cell base station 102 geographic coverage areas 110 may partially overlap (e.g., in a handover region), some of the geographic coverage areas 110 may be substantially overlapped by a larger geographic coverage area 110. For example, a small cell base station 102′ may have a coverage area 110′ that substantially overlaps with the coverage area 110 of one or more macro cell base stations 102. A network that includes both small cell and macro cell base stations may be known as a heterogeneous network. A heterogeneous network may also include home eNBs (HeNBs), which may provide service to a restricted group known as a closed subscriber group (CSG). The communication links 120 between the base stations 102 and the UEs 104 may include UL (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104. The communication links 120 may use MIMO antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity. The communication links 120 may be through one or more carrier frequencies. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or less carriers may be allocated for DL than for UL). The wireless communications system 100 may further include a wireless local area network (WLAN) access point (AP) 150 in communication with WLAN stations (STAs) 152 via communication links 154 in an unlicensed frequency spectrum (e.g., 5 GHz). When communicating in an unlicensed frequency spectrum, the WLAN STAs 152 and/or the WLAN AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available. The small cell base station 102′ may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell base station 102′ may employ LTE or 5G technology and use the same 5 GHz unlicensed frequency spectrum as used by the WLAN AP 150. The small cell base station 102′, employing LTE/5G in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network. LTE in an unlicensed spectrum may be referred to as LTE-unlicensed (LTE-U), licensed assisted access (LAA), or MulteFire. The wireless communications system 100 may further include a millimeter wave (mmW) base station 180 that may operate in mmW frequencies and/or near mmW frequencies in communication with a UE 182. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in this band may be referred to as a millimeter wave. Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW/near mmW radio frequency band have high path loss and a relatively short range. The mmW base station 180 and the UE 182 may utilize beamforming (transmit and/or receive) over a mmW communication link 184 to compensate for the extremely high path loss and short range. Further, it will be appreciated that in alternative configurations, one or more base stations 102 may also transmit using mmW or near mmW and beamforming. Accordingly, it will be appreciated that the foregoing illustrations are merely examples and should not be construed to limit the various aspects disclosed herein. Transmit beamforming is a technique for focusing an RF signal in a specific direction. Traditionally, when a network node (e.g., a base station) broadcasts an RF signal, it broadcasts the signal in all directions (omni-directionally). With transmit beamforming, the network node determines where a given target device (e.g., a UE) is located (relative to the transmitting network node) and projects a stronger downlink RF signal in that specific direction, thereby providing a faster (in terms of data rate) and stronger RF signal for the receiving device(s). To change the directionality of the RF signal when transmitting, a network node can control the phase and relative amplitude of the RF signal at each of the one or more transmitters that are broadcasting the RF signal. For example, a network node may use an array of antennas (referred to as a “phased array” or an “antenna array”) that creates a beam of RF waves that can be “steered” to point in different directions, without actually moving the antennas. Specifically, the RF current from the transmitter is fed to the individual antennas with the correct phase relationship so that the radio waves from the separate antennas add together to increase the radiation in a desired direction, while cancelling to suppress radiation in undesired directions. In receive beamforming, the receiver uses a receive beam to amplify RF signals detected on a given channel. For example, the receiver can increase the gain setting and/or adjust the phase setting of an array of antennas in a particular direction to amplify (e.g., to increase the gain level of) the RF signals received from that direction. Thus, when a receiver is said to beamform in a certain direction, it means the beam gain in that direction is high relative to the beam gain along other directions, or the beam gain in that direction is the highest compared to the beam gain in that direction of all other receive beams available to the receiver. This results in a stronger received signal strength (e.g., reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), etc.) of the RF signals received from that direction. In 5G, the frequency spectrum in which wireless nodes (e.g., base stations 102/180, UEs 104/182) operate is divided into multiple frequency ranges, FR1 (from 450 to 6000 MHz), FR2 (from 24250 to 52600 MHz), FR3 (above 52600 MHz), and FR4 (between FR1 and FR2). In a multi-carrier system, such as 5G, one of the carrier frequencies is referred to as the “primary carrier” or “anchor carrier” or “primary serving cell” or “PCell,” and the remaining carrier frequencies are referred to as “secondary carriers” or “secondary serving cells” or “SCells.” In carrier aggregation, the anchor carrier is the carrier operating on the primary frequency (e.g., FR1) utilized by a UE 104/182 and the cell in which the UE 104/182 either performs the initial radio resource control (RRC) connection establishment procedure or initiates the RRC connection re-establishment procedure. The primary carrier carries all common and UE-specific control channels. A secondary carrier is a carrier operating on a second frequency (e.g., FR2) that may be configured once the RRC connection is established between the UE 104 and the anchor carrier and that may be used to provide additional radio resources. The secondary carrier may contain only necessary signaling information and signals, for example, those that are UE-specific may not be present in the secondary carrier, since both primary uplink and downlink carriers are typically UE-specific. This means that different UEs 104/182 in a cell may have different downlink primary carriers. The same is true for the uplink primary carriers. The network is able to change the primary carrier of any UE 104/182 at any time. This is done, for example, to balance the load on different carriers. Because a “serving cell” (whether a PCell or an SCell) corresponds to a carrier frequency/component carrier over which some base station is communicating, the term “cell,” “serving cell,” “component carrier,” “carrier frequency,” and the like can be used interchangeably. For example, still referring to FIG. 1A, one of the frequencies utilized by the macro cell base stations 102 may be an anchor carrier (or “PCell”) and other frequencies utilized by the macro cell base stations 102 and/or the mmW base station 180 may be secondary carriers (“SCells”). The simultaneous transmission and/or reception of multiple carriers enables the UE 104/182 to significantly increase its data transmission and/or reception rates. For example, two 20 MHz aggregated carriers in a multi-carrier system would theoretically lead to a two-fold increase in data rate (i.e., 40 MHz), compared to that attained by a single 20 MHz carrier. The wireless communications system 100 may further include one or more UEs, such as UE 186, that connects indirectly to one or more communication networks via one or more device-to-device (D2D) peer-to-peer (P2P) links. In the example of FIG. 1A, UE 186 has a D2D P2P link 192 with one of the UEs 104 connected to one of the base stations 102 (e.g., through which UE 186 may indirectly obtain cellular connectivity) and a D2D P2P link 194 with WLAN STA 152 connected to the WLAN AP 150 (through which UE 186 may indirectly obtain WLAN-based Internet connectivity). In an example, the D2D P2P links 192 and 194 may be supported with any well-known D2D RAT, such as LTE Direct (LTE-D), WiFi Direct (WiFi-D), Bluetooth®, and so on. The wireless communications system 100 may further include a UE 104 that may communicate with a macro cell base station 102 over a communication link 120 and/or the mmW base station 180 over a mmW communication link 184. For example, the macro cell base station 102 may support a PCell and one or more SCells for the UE 104 and the mmW base station 180 may support one or more SCells for the UE 104. FIG. 1B shows an architecture diagram of an NG-RAN node 190 that may be within an NG-RAN in FIG. 1A, e.g., as a separate entity or as part of another gNB. The NG-RAN node 190 may be a gNB 102, according to one implementation. The architecture shown in FIG. 1B, for example, may be applicable to any gNB 102 in FIG. 1A. As illustrated, gNB 102 may include a gNB Central Unit (gNB-CU) 192, a gNB Distributed Unit (gNB-DU) 194, a gNB Remote Unit (gNB-RU) 196, which may be physically co-located in the gNB 102 or may be physically separate. The gNB-CU 192 is a logical or physical node hosting support for Radio Resource Control (RRC), Service Data Adaptation Protocol (SDAP) and Packet Data Convergence Protocol (PDCP) protocols of the gNB 102 used over the NR Uu air interface and controlling the operation of one or more gNB-DUs and/or gNB-RUs. The gNB-CU 192 terminates an F1 interface connected with a gNB-DU and in some implementations, an F1 interface connected with a gNB-RU. As illustrated, the gNB-CU 192 may communicate with an AMF via an NG interface. The gNB-CU 192 may further communicate with one or more other gNBs 102 via an Xn interface. The gNB-DU 194 is a logical or physical node hosting support for Radio Link Control (RLC), Medium Access Control (MAC) and Physical
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