Abstract: Method and apparatus for downlink control channel for transmit equalization waveforms for XR devices. The apparatus configures a payload comprising at least sidelink control data and a transmit equalization matrix for transmission within a transmit pre-equalization refresh period. The sidelink control data comprising at least one of a first part or a second part. The apparatus applies an equalization procedure to the payload based at least on the transmit equalization matrix. The apparatus transmits, to a second wireless device, the payload comprising at least the sidelink control data and the transmit equalization matrix.

Abstract: Methods, systems, and devices for wireless communications are described. A wireless communication device, such as a network entity or a user equipment (UE), may transmit a message to another wireless communication device, such as a network entity, including a connection establishment request and an indication of a capability of the wireless communication device to support a value of a power efficiency threshold. The other wireless communication device may respond with signaling indicating for the wireless communication device to use a value of a power efficiency for communications between the wireless communication devices. The indication may include one or more parameters indicating the value of the power efficiency. The wireless communication devices may establish a connection in accordance with the value of the power efficiency.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may establish a wireless connection with a wireless communications device via an unlicensed wireless communications channel. The UE may transmit control signaling to the wireless communications device. The control signaling may include a communications configuration that indicates one or more constraints for communicating within the unlicensed wireless communications channel. In some examples, the constraints may include a minimum bandwidth of the unlicensed wireless communications channel, a Fourier transform constraint, a subcarrier spacing (SCS) constraint, or a combination thereof. The UE may communicate one or more sidelink messages with the wireless communications device via the unlicensed wireless communications channel using a set of communications parameters based on the communications configuration and including a component carrier bandwidth, a fast Fourier transform (FFT) size, and an SCS.

Abstract: Certain aspects of the present disclosure provide techniques for network assisted selection of UE antenna ports for uplink transmissions. A method for wireless communication by a user equipment (UE) includes transmitting, to a network entity, a plurality of sounding reference signals over a plurality of UE antenna ports. The method further includes receiving, from the network entity, an indication of one or more antenna port indexes associated with one or more preferred antenna ports for uplink transmissions, and transmitting UE uplink transmissions to the network entity using one or more selected antenna ports of the one or more indicated preferred antenna ports.

Abstract: Certain aspects of the present disclosure provide techniques for slot preconfiguration for coverage enhancement and power saving. An example method performed by a UE includes processing one or more synchronization signals in a first slot according to a first configuration of slot parameters, wherein the synchronization signals are used for at least one of time or frequency tracking, receiving, from a network entity, a second configuration of slot parameters, and processing a physical downlink control channel (PDCCH) in a second slot according to the second configuration of slot parameters, wherein the second slot occurs within a configured slot duration that is offset in time from the first slot.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication of a multi-level coding (MLC) capability for uplink transmissions. The UE may receive a configuration of a selected MLC scheme associated with an uplink transmission, wherein the configuration of the selected MLC scheme is based at least in part on the indication of the MLC capability for the uplink transmissions. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a configuration of synchronization signal blocks (SSBs) for a time cycle, the configuration indicating a first SSB periodicity for a first portion of the time cycle and a second SSB periodicity for a second portion of the time cycle. The UE may receive multiple SSBs during the time cycle, the multiple SSBs received with the first SSB periodicity during the first portion of the time cycle and with the second SSB periodicity during the second portion of the time cycle. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may receive, from another device (e.g., a user equipment (UE)), a message indicating a configuration of a set of log-likelihood ratio (LLR) scaling reference signals. The configuration may indicate a resource allocation for the set of LLR scaling reference signals, where the resource allocation may be based on a type of waveform used for communications between the wireless device and the UE. The wireless device may receive one or more pre-equalized data transmissions having the waveform type, and the pre-equalized data transmission may include the LLR scaling reference signals in accordance with the resource allocation. The wireless device may perform measurements of the set of LLR scaling reference signals for performing LLR scaling, and the wireless device may decode the one or more pre-equalized transmissions based on the LLR scaling using the set of LLR scaling reference signals.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit one or more messages that indicate a capability of the UE to support the reception of demodulation reference signals (DMRS) and time drift reference signals (TDRS) according to one or more signaling patterns configured by the network. The UE may then receive one or more control messages that indicate a first signaling pattern for one or more DMRSs and a second signaling pattern for one or more TDRSs, where the first signaling pattern corresponds to or is based on the second signaling pattern. The UE may receive a downlink shared channel multiplexed with the one or more DMRSs according to the first signaling pattern and may receive the downlink shared channel multiplexed with the one or more TDRSs according to the second signaling pattern.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a sounding reference signal (SRS) configuration for SRS resources included an SRS resource set. The SRS configuration includes one or more first time domain parameters for the SRS resources. The UE may receive a dynamic indication of one or more second time domain parameters for the SRS resources. At least a subset of the one or more second time domain parameters are modified from the one or more first time domain parameters included in the SRS configuration. The UE may transmit, based at least in part on the one or more second time domain parameters, an SRS using the SRS resources. Numerous other aspects are described.

Abstract: In a wireless communication system, dynamic changes of a code block (CB) to resource element (RE) mapping type may be based on a two-step procedure. A user equipment may provide an indication that a recommended CB mapping type is preferred over a current CB mapping type. The indication may be one or two bits in a periodic or per-allocation report. In response to the indication, a base station may trigger the UE to transmit an aperiodic CSI report. The aperiodic CSI report may include channel state feedback corresponding to one or more CB mapping types including the preferred CB mapping type. The base station may consider the UE recommended CB mapping type and channel state feedback when selecting a CB mapping type.

Abstract: Aspects presented herein may improve beam management and neighbor cell(s) monitoring related characteristics on a UE side, which may include improved power consumption, configuration volume reduction, and more robust and efficient beam tracking procedures for UEs receiving and monitoring SSBs transmitted by a base stations. In one aspect, a UE is configured to apply an SSB IDs classification based on a systematic mapping configuration that maps a set of SSB IDs to a plurality of SSB beams of a network entity, each SSB beam of the plurality of SSB beams being associated with one SSB ID of the set of SSB IDs and covering a range of azimuth angles and a range of elevation angles. Based on the mapping configuration and the semi-deterministic SSB beams sweeping pattern, the UE may classify SSB IDs into different categories and prioritize and deprioritize measurements for one or more SSB IDs.

Abstract: A UE of a wireless communication network first receives a modulation and coding scheme index IMCS for demodulating a physical layer data channel of the network. The UE then demodulates the physical layer data channel with a non-square quadrature amplitude modulation (NS-QAM) having a modulation order and code rate corresponding to a spectral efficiency (SPEFF) substantially equal to a SPEFF of a square QAM (S-QAM) SPEFF indicted by the IMCS, where the NS-QAM has an effective channel code rate no larger than the code rate for which the UE may skip decoding a transport block in an initial received transmission.

Abstract: A method for wireless communication at a user equipment (UE) and related apparatus are provided. In the method, the UE obtains channel information for a sidelink channel between the UE and a receiving device and performs a pre-equalization process on a signal to be transmitted to the receiving device based on the channel information to obtain a pre-equalized signal. The UE then transmits the pre-equalized signal to the receiving device through the sidelink channel.

Abstract: Methods, systems, and devices that support channel estimation reference signals for pre-equalization are described. In some examples, channel state information (CSI) for a link between a user equipment (UE) and another wireless device may be acquired by the UE based on samples of a downlink reference signal transmitted from the UE to the wireless device. Specifically, the wireless device (e.g., an extended reality (XR) device) may obtain samples of the downlink reference signal (e.g., a channel estimation reference signal) and report or indicate (e.g., transmit) the samples to the UE via an uplink transmission. For example, the reference signals may be sampled at the wireless device side, and CSI may be obtained using the samples signaled back to the UE by the wireless device. The UE may perform channel estimation based on the received samples, which may enable transmit pre-equalization of signals sent to the wireless device.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform an initialization procedure with an extended reality (XR) device including a time synchronization and a frequency synchronization. The UE may receive, from the XR device and at a first periodicity, first pilot signals, and may transmit, based on receiving the first pilot signals, a first control message indicating a first set of correction factors to apply to at least one of the time synchronization or the frequency synchronization. The UE may transmit, to the XR device and at a second periodicity, a second pilot signal, and may receive, from the XR device, a second control message including samples of the second pilot signal. The UE may transmit, based on the samples, a third control message indicating a second set of correction factors to apply to the time synchronization between the UE and the XR device.

Abstract: A wireless device receives control signaling from a user equipment (UE) indicating one or more quantization scheme parameters. The wireless device measures a downlink reference signal from the UE based on the one or more quantization scheme parameters and reports, to the UE, quantized sampling information based on measurement of the downlink reference signal from the UE. The wireless device receives one or more equalized data transmissions from the UE after providing the quantized sampling information to the UE.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) waveform pre-equalization for MIMO communications. A receiver device, such as an extended reality (XR) device, may be configured to offload a portion of data processing to a companion device, such as a user equipment (UE). In some aspects, the UE may generate a DFT-S-OFDM waveform and may apply a pre-equalization to the DFT-S-OFDM waveform. Applying the pre-equalization to the DFT-S-OFDM waveform may include applying a minimum mean square error (MMSE) pre-equalization to the DFT-S-OFDM waveform. The receiver device may receive the pre-equalized DFT-S-OFDM waveform from the UE and may process the pre-equalized DFT-S-OFDM waveform.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive one or more reference signals associated with a downlink communication. The UE may transmit an indication of a preferred demodulation reference signal (DMRS) configuration to be used for the downlink communication, the preferred DMRS configuration based at least in part on the one or more reference signals and a transmission mode associated with the preferred DMRS configuration. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may transmit a request, for an uplink transmission or a downlink transmission, for amplitude modulated phase tracking reference signals; and communicate the uplink transmission or the downlink transmission based at least in part on the request. Numerous other aspects are provided.