Abstract: Methods, systems, and devices for wireless communications are described. In polar coding, some bits channels have a higher reliability and other bit channels have a lower reliability. Data may be transmitted on some of the bit channels, and frozen values known to both the receiver and transmitter may be transmitted on the remaining bit channels. The performance of different polar code schemes (e.g., which bit channels are frozen) may depend on the decoder the receiving device uses. A receiving device (e.g., a user equipment for downlink transmissions) may indicate a decoder or polar decoding capability to the transmitting device (e.g., the network entity for downlink transmissions), and the transmitting device may select and indicate to the receiving device a polar coding scheme based on the indicated decoder or decoding capability. The transmitting device may transmit a communication to the receiving device encoded in accordance with the indicated polar coding scheme.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit an indication of a capability of the UE to communicate in accordance with a polar multi-layer coding (MLC) multiple input multiple output (MIMO) communication scheme. The UE may receive a configuration for communication in accordance with the polar MLC MIMO communication scheme, wherein the configuration indicates a sub-block size threshold. The UE may communicate a message in accordance with the polar MLC MIMO communication scheme based at least in part on a determination that a sub-block size for the message satisfies the sub-block size threshold.

Abstract: A device may encode a first set of pictures of the video data to generate first encoded video data; generate first error correction data based on the first encoded video data; transmit the first error correction data and the first encoded video data to a receiving device; receive, from the receiving device, a decimation pattern indication that indicates a decimation pattern determined based on the first set of pictures, the decimation pattern being a pattern of encoded video data non-transmission; encode a second set of pictures of the video data to generate second encoded video data; generate second error correction data based on the second encoded video data; apply the decimation pattern to the second encoded video data to generate decimated video data; and transmit the second error correction data and the decimated video data to the receiving device.

Abstract: Methods, systems, and devices for wireless communications are described. A network entity may insert one or more error check portions into a polar-encoded signal, where a first error check portion may protect a first portion of the polar-encoded signal. In some examples, a user equipment (UE) may determine a location for the first error check portion based on one or more decoding parameters and may transmit signaling requesting the determined location. The network entity may transmit the polar-encoded signal, and the UE may perform successive cancellation list (SCL) decoding of the polar-encoded signal, determining a first quantity of probable bit sequences for the first portion of the polar-encoded signal. The UE may reduce the SCL list size, make hard decisions on bit values for the first portion, terminate decoding early, or any combination thereof based on the first quantity of probable bit sequences and the first error check portion.

Abstract: Methods, systems, and devices for wireless communications are described. A wireless communications device may receive a waveform including both a first waveform comprising an orthogonal frequency division multiplexing (OFDM) waveform and a second waveform comprising a single-carrier waveform via a set of time-frequency resources. The wireless device may decode the first waveform based on receiving the waveform, where the first waveform includes one or more reference signals. The wireless communications device may decode the second waveform based on receiving the waveform and on a time domain equalization filter that is based on decoding the one or more reference signals, where the second waveform comprises a set of data bits. In some examples, the waveform may further include a third waveform including a second OFDM waveform and the wireless communications device may decode the third waveform including one or more second reference signals based on receiving the waveform.

Abstract: A communications device inputs channel state information to an artificial neural network. The communications device predicts weather conditions with the artificial neural network based on the channel state information. The communications device further adjusts communications based on the predicted weather conditions.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter may generate multiple encoded bits using a polar encoder. The transmitter may separate the multiple encoded bits into N layers for a multiple-input-multiple-output (MIMO) transmission. The transmitter may select V layer pairs from the N layers, each layer pair of the V layer pairs including a respective first layer and a respective second layer from the N layers. The transmitter may group, for each layer pair of the V layer pairs, a first M symbol bits of the respective first layer and a second M symbol bits of the respective second layer to generate multiple bit pairs. Each bit pair includes a respective first bit of the first M symbol bits and a respective second bit of the second M symbol bits. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter may generate multiple encoded bits using a polar encoder. The transmitter may separate the multiple encoded bits into N layers for a multiple-input-multiple-output (MIMO) transmission. The transmitter may select V layer pairs from the N layers, each layer pair of the V layer pairs including a respective first layer and a respective second layer from the N layers. The transmitter may group, for each layer pair of the V layer pairs, a first M symbol bits of the respective first layer and a second M symbol bits of the respective second layer to generate multiple bit pairs. Each bit pair includes a respective first bit of the first M symbol bits and a respective second bit of the second M symbol bits. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. Systematic polar codes may be used for the transmission of information bits to a wireless communications device, such as for extended reality (XR) applications, online video application, or other applications. In such cases, information bits of a data stream may be sorted based on priority or importance. Additionally, in accordance with the use of systematic polar coding, bit-channels may be sorted by protection level, and the sorted bits may be mapped to the most highly protected bit-channels (e.g., based on the importance of the bits). The mapped bits may be encoded using a systematic polar encoder to generate a codeword, and the codeword may be transmitted to another wireless communications device.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting device may obtain a demodulation reference signal (DMRS) for frequency range two (FR2) non-terrestrial network (NTN) communications, the DMRS having a DMRS sequence with a peak-to-average power ratio (PAPR) that satisfies a PAPR condition in a time domain. The transmitting device may transmit the DMRS to a receiving device in an NTN network associated with the FR2 NTN communications. Numerous other aspects are described.

Abstract: In an aspect, a UE may transmit a first indication that the UE supports a capability to reduce power consumption associated with a constellation and code rate of at least a demodulator of the UE. The UE may receive, based on the first indication, a second indication to utilize a modulation and coding set (MCS) table from a plurality of MCS tables. The UE may receive data from a network node based on the MCS table.

Abstract: Aspects described herein relate to signals transmitted in federated learning (FL) of a neural network (NN) using wireless communications. A transmitting device can generate an analog modulation signal to indicate an updated value for one or more coefficients for a federated learning (FL) procedure for a neural network, and the transmitting device can transmit the analog modulation signal over time and frequency resources configured for a UE group of multiple UE groups, where each UE group of the multiple UE groups is associated with a range of values of a measured signal metric. The receiving device can receive a combined signal from one or more UE groups and can normalize the received signal by power to determine the combined coefficient update for the NN.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a capability message, the capability message including an indication of a UE capability for per-layer codeword mapping and a channel state feedback report option. The UE may further receive a channel state feedback configuration that includes an indication of a channel state feedback report type, where the channel state feedback report type is a wideband report, a sub-band report, or a combination thereof. Moreover, the UE transmit a channel state feedback report in accordance with the channel state feedback report option and the channel state feedback report type. Further, the channel state feedback report may be contingent on the UE capability for per-layer codeword mapping and comprising information associated with per layer mutual information.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. Some aspects relate to polar encoding and decoding of communications. Aspects described herein provide techniques by which two forms of polar encoding, bit-interleaved coded modulation (BICM) and multi-level coding (MLC) can be implemented using the same transmit procedure and hardware. For example, aspects described herein provide for a modulation constellation labeling associated with one form of polar coding, such as a set partitioning labeling, to be transformed such that polar coding using the transformed modulation constellation and BICM is equivalent to MLC polar coding. Aspects described herein also provide signaling related to these techniques.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to multiple input multiple output (MIMO) spinal code encoding schemes. In some aspects, a transmitter may encode a message in accordance with configuration information associated with a MIMO spinal code encoding scheme, resulting in a vector that includes multiple spinal symbols. The transmitter may further map the multiple spinal symbols to multiple transmit antennas, such as by distributing the multiple spinal symbols across multiple layers associated with the multiple transmit antennas and across one or more resource elements (REs) in accordance with the configuration information. The transmitter may transmit, using the multiple transmit antennas and the one or more REs, and a receiver may receive, using multiple receive antennas and the one or more REs, the multiple spinal symbols.

Abstract: Methods, systems, and devices for wireless communications are described. The techniques described herein relate to an early termination predictor report. A user equipment (UE) monitors for a first downlink signal from a network entity. The UE transmits a predictor report indicative of an early decoding termination prediction accuracy associated with decoding the first downlink signal by a decoder of the UE. The UE monitors, in response to transmitting the predictor report, for a second downlink signal from the network entity, the second downlink signal based at least in part on the predictor report.

Abstract: A method for wireless communication by a receiving device includes predicting with an artificial neural network, at each data block of a set of data blocks, a least complex demodulator that will achieve a goal. The predicting is based on features of a data block expected to be received at the receiving device. The method also includes dynamically selecting the least complex demodulator, from a set of demodulators with different levels of complexity, based on the features of the data block expected to be received. The method further includes demodulating the data block with the selected demodulator for the data block.

Abstract: Method and apparatus for inter-eye prediction models for XR. The apparatus transforms at least part of a first frame associated with a first perspective of a first camera to at least part of a second frame associated with a second perspective of a second camera based on at least one prediction model. The apparatus transmits, to a second wireless device, a prediction indication of the at least one prediction model used to transform the at least part of the first frame to the at least part of the second frame. The apparatus transmits, to the second wireless device, an encoded signal comprising a combined frame comprising a combination of at least the first frame and the second frame.

Abstract: Methods, systems, and devices for wireless communications are described. Polar coding involves assigning bits to different bit-channels, and encoding the bits such that certain bit-channels (e.g., polar channels) are polarized to increased reliability, while other bit-channels are polarized to decreased reliability. To ensure that polar codes for extended reality (XR) and video applications have increased reliability for the aspects of an XR stream or video code that are most important, the information bits of a stream may be sorted based on priority or importance. Then the sorted information bits may be mapped to the most reliable bit-channels of a polar encoder. Any errors in the transmission may therefore be most likely to occur in the less important bits. Accordingly, in the case of XR, the information bits that are most important to user experience/perception are the most likely to be successfully received and decoded at the receiver.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a constellation for a spinal encoded message, wherein identifying the constellation is associated with at least one of a noise parameter or a nonlinearity parameter. The UE may transmit the spinal encoded message in accordance with the constellation. Numerous other aspects are described.