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.

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: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may receive a random access channel (RACH) message. The base station may determine, based at least in part on the RACH message, whether the RACH message was transmitted directly to the base station by a user equipment (UE) or whether the RACH message was relayed from the UE to the base station via a millimeter wave repeater. The base station may perform a beam management procedure based at least in part on the determination. Numerous other aspects are provided.

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 user equipment (UE) may obtain an indication of a maximum quantity of component carriers (CCs), that each carry a carrier waveform, that are to be scheduled concurrently on a transmit chain for carrier aggregation. The UE may schedule a quantity of CCs to carry carrier waveforms concurrently on the transmit chain such that the quantity of CCs does not exceed the maximum quantity of CCs. The UE may transmit communications corresponding to the carrier waveforms. Numerous other aspects are described.

Abstract: Backhaul resources may be allocated to different wireless communication links between different base stations, and local redistribution of resources among base stations may be utilized to account for variations in signal quality and/or variations in traffic experienced by different nodes of the backhaul network. A first access node function (ANF) may determine a need for additional backhaul resources, and may transmit a request message to one or more user equipment functions (UEFs) for additional backhaul resources. A UEF that receives the request message may forward the request to an associated second ANF. The second ANF, if it has backhaul resources available that the first ANF can use, may send a response to the first ANF, via the associated UEF, and the first ANF may use the additional resources that were originally allocated to the second ANF.

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques may enable a user equipment (UE) to receive control signaling indicating a first signal strength threshold and a second signal strength threshold that define multiple signal strength groups. The control signaling may further indicate a quantity of reference signal beams for each group of the signal strength groups for the UE to report. In some examples, the UE may report a quantity of reference signals for each group per antenna module of the UE. Reporting a combination of reference signal beams with relatively high and relatively low signal strengths relative to the signal strength thresholds, may enable a network entity to schedule resources more efficiently.

Abstract: Various aspects of the present disclosure generally relate to wireless communication, and to channel feedback for multi-user multiple-input-multiple output (MU-MIMO) communications. For example, the present disclosure provides techniques for explicit channel feedback at an analog beam level for a MU-MIMO system. In some aspects, a user equipment (UE) receives, via an analog receiving beam, reference signals transmitted by a network node via a plurality of analog beams. Based on the received reference signals, the UE determines channel impulse response (CIR) values for each frequency component of one or more frequency components of a frequency range, and transmits CIR information that indicates at least one CIR value to the network node. In another aspect, the network node uses the CIR information to co-schedule multiple UEs for MU-communications, determine one or more beams to be used by the multiple UEs for their MU-MIMO communications, or a combination thereof.

Abstract: An apparatus, at a network entity, for scheduling multi-user multiple-input multiple-output (MU-MIMO) transmissions to a co-scheduled set of user equipment (UEs) from an antenna array comprising multiple panels is disclosed. The apparatus comprises: a processor; a memory communicatively coupled to the processor; and executable instructions code stored in the memory, which when executed by the processor, cause the processor to: determine a reduced set of entries of panel-to-UE assignment from among multiple combinations of panel-to-UE assignment; and select, from within the reduced set, an entry of the panel-to-UE assignment for scheduling, based on a proportionately fair (PF) metric, wherein a panel-to-UE assignment is a mapping of the panels assigned to transmit to a selection of the UEs using associated serving beams configured for transmission to the respective UEs.

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.