Abstract: Apparatus, methods, and computer program products for wireless communication are provided. An example method may include transmitting, to a network entity, a dynamic UE capability that indicates a potential of upgrading a power class based on a usage of an uplink analog beamforming (ABF) scheme. The example method may further include transmitting, to the network entity, an uplink transmission based on the uplink ABF scheme with the upgraded power class. The example method may further include receiving, from the network entity, an indication to reduce an uplink transmit power after transmission of the uplink transmission.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may communicate, with a network node, information associated with an analog beamforming procedure for generating one or more sets of analog beamforming weights for communications via a frequency range using a set of monopole antennas. The UE may generate the one or more sets of analog beamforming weights in accordance with communicating the information associated with the analog beamforming procedure. The UE may communicate, with the network node via the frequency range using the set of monopole antennas, one or more messages according to the one or more sets of analog beamforming weights. Numerous other aspects are described.

Abstract: Overlaid frequency-domain reflection modulation is described. An apparatus is configured to shift a first order harmonic, with respect to an associated transmission signal, to a shifted frequency-domain position. The apparatus is configured to encode, based on the shifted frequency-domain position, an information bit over time-domain modulated information to generate an overlaid modulation information bit. The apparatus is configured to transmit, for a receiver and in accordance with a single sideband reflection, the overlaid modulation information bit. Another apparatus is configured to receive, from a transmitter and in accordance with a single sideband reflection, an overlaid modulation information bit based on a shifted first order harmonic, of an associated transmission signal, at a shifted frequency-domain position.

Abstract: Methods, systems, and devices for wireless communications are described. When operating in a high-pathloss mode, wireless devices in a network may transmit or receive downlink control information (DCI) that schedules a transmission time interval (TTI) for a physical shared channel (such as a physical uplink shared channel (PUSCH) or a physical downlink shared channel (PDSCH)). A wireless device may determine one or more intervals that correspond to a periodic signal that collides with portions of the TTI. Based on the identified intervals, the wireless device may communicate over the physical shared channel during the TTI. In such cases, the TTI may overlap in time with the one or more intervals to allow communication of the periodic signal during the portions of the TTI. For instance, a periodic signal may be transmitted or received during each of the one or more intervals.

Abstract: Example implementations include low-complexity antenna group formation in analog beamforming with discrete or uni-polarized antennas in wireless communication systems. In one implementation, the UE may receive an indication that includes antenna beamforming information associated with multiple antenna elements across multiple antenna layers. The UE may further configure one or both of a phase shifter or an amplitude control for each of the multiple antenna elements. In another implementation, a network entity may identify, based on UE hardware capability information, antenna beamforming information including the one or more virtual antenna modules, where each of the one or more virtual antenna modules forming an antenna grouping from one or both of a phase shifter or an amplitude control for each antenna element. The network entity may further transmit, to the UE, an indication that includes the antenna beamforming information associated with multiple antenna elements across multiple antenna layers.

Abstract: Methods, systems, and devices for wireless communications are described. Techniques described herein may enable an energy harvesting (EH)-capable device to backscatter a signal from a reader device by generating a first amplitude level associated with a first reflection phase and a second reflection phase and an additional amplitude for a third reflection phase. The additional amplitude may be associated with reflection of a received signal during an “OFF” mode of the EH-capable device. In some examples, the reader device may indicate one or more waveform parameters such as time durations associated with reflection phases to the EH-capable device, and the EH-capable device may reflect a signal to the reader device in accordance with the waveform parameters using the “OFF” state.

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may obtain an incident signal. In some implementations, the wireless device may select a chip rate according to a subcarrier data mapping, and the wireless device may generate a reflected signal in accordance with a periodic load switching pattern applied to the incident signal at a frequency corresponding to the selected chip rate. Accordingly, the wireless device may output the reflected signal, where a first subset of resource elements of the reflected signal are energy-bearing resource elements that satisfy the subcarrier data mapping, and a second subset of resource elements of the reflected signal are non-energy-bearing resource elements that satisfy the subcarrier data mapping.

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques enable a first wireless device to suppress higher-order harmonic frequencies in a reflected signal using subcarrier allocation and one or more harmonic suppression windows in an incident signal. For example, the first wireless device may determine a resource allocation across multiple resource elements (REs) of the incident signal. Within the resource allocation, a respective harmonic suppression window may include a first symbol mapped to a first RE to be reflected to the first-order harmonic frequency of the reflected signal and multiple null symbols mapped to REs that correspond to higher-order harmonic frequencies of the reflected signal. The null symbols in the harmonic suppression window may suppress interference from the higher-order harmonic frequencies, which may enable the second wireless device to more-accurately detect the first symbol.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus for wireless communication at a user equipment (UE) comprises memory and at least one processor coupled to the memory. Based at least in part on information stored in the memory, the at least one processor is configured to obtain a configuration for uplink discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) communication, wherein the configuration for the uplink DFT-s-OFDM communication indicates a set of resource blocks (RBs) for a transmission of at least one signal, wherein the set of RBs includes a plurality of resource elements (REs) including a set of supported REs or at least one additional RE. The at least one processor is further configured to transmit the at least one signal in accordance with the configuration for the uplink DFT-s-OFDM communication.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may communicate with a second network node using a line-of-sight (LOS) multiple input multiple output (MIMO) configuration at a frequency. The first network node may communicate, based at least in part on a multi-user MIMO (MU MIMO) mode, with a third network node using the LOS MIMO configuration and at the frequency, wherein the MU MIMO mode corresponds to an antenna system configuration of the rectangular antenna array, wherein the antenna system configuration includes at least one of an antenna assignment scheme, an antenna amplitude configuration, or an antenna phase configuration. 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 apply a probabilistic amplitude shaping in discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) to a plurality of symbols to obtain a plurality of shaped symbols, wherein the probabilistic amplitude shaping is associated with a probability distribution with a steeper-than-Gaussian decay. The UE may transmit a signal associated with the plurality of shaped symbols. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques may enable transmitting and receiving devices to increase an effective aperture size of transmitting and receiving antenna arrays, which may increase an achievable rank of spatially multiplexed communications. For example, one or both of the transmitting device and the receiving device may use a reflective component to reflect signals transmitted between the devices, which may allow for larger effective aperture sizes without increasing a physical distance between antenna elements. In some examples, the reflective component may be a static concave mirror associated with a predetermined weight vector and focal point. In some examples, the concave mirror may be a reflective intelligent surface (RIS) of reflective elements with reflective properties which may be dynamically adjusted to various weight vectors. An orientation of the RIS may be adjusted to steer a beam in various directions in space.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may transmit an indication of a dynamic uplink grant for a set of consecutive duty-cycle-based symbols. The network node may receive the set of consecutive duty-cycle-based symbols based at least in part on the dynamic uplink grant. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to communicate using ? 2 binary phase shift keying (BPSK) modulation according to extended coding rates. In some cases, the UE may receive configuration information that supports modulation orders for ? 2 ? BPSK modulation extended to include modulation orders otherwise only configured for quadrature phase shift keying (QPSK) modulation. Further, the UE may support dynamic switching between ? 2 ? BPSK and QPSK modulation. For example, the UE may transmit or receive control signaling indicating a modulation order for an uplink transmission, where the UE or a network entity may determine which modulation scheme and order to use according to communication parameters associated with the uplink transmission, the UE, or both.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may receive, from a repeater having a first interface and a second interface, information associated with one or more capabilities of the repeater, the second interface being different from the first interface. The base station may determine an operation mode for the repeater based at least in part on the information associated with the one or more capabilities of the repeater, and may communicate with the repeater via the first interface or the second interface. In some aspects, a repeater may transmit to a base station via a first interface, information associated with one or more capabilities of the repeater, and may communicate via the first interface or via a second interface in accordance with an indicated operation mode, the second interface being different from the first interface. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter node may determine a set of parameters for a waveform to be transmitted by the transmitter node, wherein the waveform is to use an allocated bandwidth that is larger than a sweeping bandwidth of a frequency modulated continuous wave (FMCW) chirp. The transmitter node may transmit the waveform according to the set of parameters. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communication are described. A communication device may receive a beacon signal and, in response, may transmit a preamble based on an indicated preamble configuration. In some examples, the received beacon signal may be associated with one or more power signature identifier. In some cases, the communication device may determine a set of resource elements based on the one or more power signature and may transmit the preamble based on the determined set of resources elements. In some cases, in response to receiving the beacon signal, the communication device may transmit a report including an indication of the subset of resource elements. In some examples, a communication device may transmit a preamble that may include a request for cell information associated with a received beacon signal.

Abstract: Systems and techniques are provided for wireless communications. For example, a network device can receive configuration information for redundancy bits associated with scheduled non-coherent transmissions. The network device can receive a plurality of non-coherent transmissions corresponding to a message, the message including a plurality of data bits and a plurality of redundancy bits, wherein each non-coherent transmission of the plurality of non-coherent transmissions is associated with a duty cycle corresponding to the scheduled non-coherent transmissions. The network device can determine error control information for one or more data bits of the plurality of data bits using corresponding redundancy bits of the plurality of redundancy bits, wherein the corresponding redundancy bits are determined based on the configuration information.

Abstract: Methods, systems, and devices for wireless communication are described. In some systems, a first device may include a first circular antenna array including a first quantity of antenna subarrays. A second device may include a second circular antenna array including a second quantity of antenna arrays. Each antenna subarray may include one or more antenna elements. The first device may transmit one or more reference signals to the second device. The second device may transmit a feedback message to the first device based on the reference signals. The feedback message may include an indication of sets of beamforming weights or information for determining the sets of beamforming weights based on the second quantity of antenna subarrays being different than the first quantity of antenna subarrays. The first device may transmit one or more signals concurrently to the second device based on the sets of beamforming weights.

Abstract: Certain aspects of the present disclosure provide techniques for wireless communication by a user equipment (UE). An example method includes communicating with a wireless node using one or more antenna panels, detecting a persistent drop in signal quality associated with at least one antenna panel of the one or more antenna panels based on the communication, and transmitting, to the wireless node, information including an indication of the persistent drop in signal quality associated with the at least one antenna panel.