Abstract: Methods, systems, and devices for wireless communication are described. A receiver may orient its antenna arrays based on signaling from a transmitter and a distance between the receiver and the transmitter. The transmitter may transmit an indication of an orientation of its antenna array. The receiver may receive the indication and may determine the distance between the receiver and the transmitter. Based on whether the distance between the receiver and the transmitter satisfies a threshold distance from the transmitter, the receiver may select an orientation for its antenna array.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) or relay node may transmit a beam report indicating a polarization layer mismatch (achievable rates are different for the first and second polarizations, or positioning estimation accuracy is different for the first and second polarizations). The report may include an indication of an imbalance in signal strength, an estimation error for the two polarizations, one or more beam pairs that are not supported across the two polarizations, a preferred polarization, or a combination thereof. In response to the beam report, the network entity may adjust one or more parameters, and may transmit accordingly. A relay node may indicate non-co-located polarization array construction via capability information. The UE may then transmit feedback indicating a direction of steered beams at the UE. The relay node performs relay operations based on transmission characteristics selected from the beam direction information.

Abstract: Certain aspects of the present disclosure provide techniques for improving beam management. An example method includes receiving, from a network entity, configuration information configuring the UE with a set of transmission configuration indicator (TCI) states, wherein the configured set of TCI states comprises a first number of TCI states for use in communicating with the network entity, detecting a change in an operation mode of the UE from a first operation mode to a second operation mode, and transmitting, based on the detected change in the operation mode of the UE, information to the network entity indicating the UE will monitor and report on a reduced second number of TCI states of the configured set of TCI states relative to the first number of TCI states.

Abstract: A dual-polarized multiple-input-multiple-output (MIMO) mobile device is provided that includes a first array of antennas and a second array of antennas. Based upon a blockage of at least one of the array of antennas being less than a blockage threshold, the mobile device operates in a default configuration in which a default polarization selection from the second array is used in combination with a fixed polarization selection from the first array to form a first MIMO layer signal and a second MIMO layer signal. Should the blockage exceed the blockage threshold and an optional performance threshold be satisfied, the mobile device may operate in a dynamic configuration in which a dynamic polarization selection from the second array is reversed as compared to the default polarization selection.

Abstract: Methods, systems, and devices for wireless communications are described. Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support methods for selection of antenna arrays and beamforming feedback. In some cases, a user equipment (UE) may monitor for an antenna blockage condition at the UE and may select a set of antenna arrays for the UE for communications between the UE and a network entity based at least in part on whether the antenna blockage condition is detected, the set of antenna arrays selected from a multiple predetermined sets of antenna arrays of the UE. Additionally, the UE may transmit, to the network entity, a message indicative of whether the antenna blockage condition is detected and may communicate with the network entity using the set of antenna arrays in accordance with whether the antenna blockage condition is detected.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may store a beamforming calibration configuration including one or more beamforming parameters. The UE may detect one or more trigger conditions. The UE may transmit a beamforming calibration update request as a result of detecting the one or more trigger conditions. The UE may receive one or more beamforming assistance signals in response to the beamforming calibration update request. The UE may update at least one of the one or more beamforming parameters in the beamforming calibration configuration based, at least in part, on the one or more beamforming assistance signals. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. To reduce peak-to-average power ratio (PAPR) associated with transmissions in a wireless communications system, a user equipment (UE) may implement tone reservation techniques. The UE may receive downlink control information from a base station that indicates a set of allocated resources that the UE is to use for the tone reservation. The UE may identify a first set of tones of the set of allocated resources for transmitting a data signal and a second set of tones of the set of allocated resources for transmitting a peak-reduction signal that reduces the peak power of the data signal. The UE may transmit the data signal and the peak-reduction signal based on the received downlink control information.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless communication device may transmit, to a second wireless communication device, capability information including an indication of a type of calibration associated with a non-co-located dual-polarized antenna array of the first wireless communication device. The first wireless communication device may communicate, using the non-co-located dual polarized antenna array, based at least in part on the calibration associated with the non-co-located dual polarized antenna array. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may detect and report blockage conditions based on measuring signal strengths of reference signals. A UE may determine a slew rate for the signal strength, corresponding to a rate of change of a signal strength parameter (e.g., a reference signal received power (RSRP) or a received signal strength indicator (RSSI)) with respect to time, and report the slew rate to a base station to indicate signal strength degradation (e.g., due to a blockage). In some examples, the UE may define multiple slew rates associated with different rates of change of the signal strength parameter with respect to time. When the UE crosses a level of slew rate, the UE may indicate this to the base station to initiate mitigation procedures. In some examples, the techniques described herein may be extended to reporting slew rates for multiple beams.

Abstract: Certain aspects of the present disclosure provide techniques for communicating information associated with one or more phase shift parameters for a beamforming circuit, wherein the beamforming circuit includes a Butler matrix having one or more sets of configurable phase shifters; and communicating in accordance with the one or more phase shift parameters. Numerous other aspects are provided.

Abstract: Methods, apparatuses, and computer readable medium for wireless communication are provided. An example method may include receiving, from a base station, at least one channel status information (CSI) report setting associated with CSI resource setting that configures a set of CSI reference signals (CSI-RS resources), at least one CSI report setting including at least one quantity change rate associated with one or more predicted quantities over at least one future time window or one or more measured quantities over at least one past time window, one or more predicted quantities or one or more measured quantities being associated with the set of CSI-RS resources. The example UE may further include transmitting, to the base station based on at least one CSI report setting, the quantity change rate or reliability information message based on one or more predicted quantities over at least one future time window.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network device may transmit, to a base station, an indication of a capability of a beamforming architecture of the network device. The network device may communicate with the base station based at least in part on the capability of the beamforming architecture of the network device. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may transmit an insufficient calibration message based at least in part on a trigger condition that indicates that a calibration of the wireless communication device is insufficient. The wireless communication device may receive a set of signals associated with calibration assistance in response to the insufficient calibration message. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described, including detection of whether a first wireless device is location within a near-field distance of a second wireless device. The first wireless device measures phases of reference signals received at first antenna array of the first antenna array from a second antenna array of the second wireless device. The first wireless device determines, based on the phases, the values of quadratic terms associated with an equation for calculating the distance between a first antenna of the first antenna array and the center of the first antenna array or for calculating the distance between a second antenna of the second antenna array and the center of the second antenna array. The first wireless device determines, based on the quadratic terms, whether the first wireless device is within the near-field distance of the second wireless device.

Abstract: A dual-polarized multiple-input-multiple-output (MIMO) mobile device is provided that includes a first array of antennas and a second array of antennas. Based upon a blockage of at least one of the array of antennas being less than a blockage threshold, the mobile device operates in a default configuration in which a default polarization selection from the second array is used in combination with a fixed polarization selection from the first array to form a first MIMO layer signal and a second MIMO layer signal. Should the blockage exceed the blockage threshold and an optional performance threshold be satisfied, the mobile device may operate in a dynamic configuration in which a dynamic polarization selection from the second array is reversed as compared to the default polarization selection.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to adaptively generate beam weights for use in communications with multiple transmission reception points (TRPs) at a single antenna panel of the UE. For example, the UE may perform reference signal measurements using coordinated reference signals from the multiple TRPs. The UE may use the reference signal measurements to generate and select adaptive beam weights. The UE may generate beams using the selected beam weights to receive and/or transmit signaling to or from the multiple TRPs at a single antenna panel of the UE. In some cases, the TRPs may indicate coordination information, such as timing alignment errors (TAEs) and carrier frequency offsets (CFOs), such that the UE may receive the reference signals and co-phase energy from the multiple TRPs at an antenna panel using a same set of time-frequency resources.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a control message indicating a power scaling parameter dedicated to a frequency subband of a band for wireless communications by an antenna panel at the UE. In some cases, the UE may switch from a second frequency subband of the band to the frequency subband based on receiving the control message, and the UE may switch from a second power scaling parameter associated with the second frequency subband to the power scaling parameter based on switching to the frequency subband. The UE may transmit, by the antenna panel, a signal via the frequency subband at a transmit power that is based on the power scaling parameter dedicated to the frequency subband.

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the techniques described herein may support generating an average effective isotropic radiated power (EIRP) mask in accordance with a set of weighted values to support interference management. For example, a wireless device may obtain one or more information bits for transmission by the wireless device via a transmit beam of multiple transmit beams of the wireless device and may generate, based on one or more directional parameters associated with a beamforming direction of the transmit beam, a set of weighted values for an average EIRP mask for the transmission of the one or more information bits. Additionally, the wireless device may transmit, via the transmit beam in the beamforming direction based on the one or more directional parameters and the set of weighted values, a signal comprising the one or more information bits to meet the average EIRP mask.

Abstract: Example implementations include a method, apparatus and computer-readable medium for wireless communication configured for estimating a channel using a set of predefined sensing beams to measure reference signals. Estimating the channel may include generating an N×N channel correlation matrix, where N is a number of antenna elements in the antenna array. The implementations further include generating a set of dynamic beam weights to maximize a reference signal received power (RSRP) based on the estimated channel. The set of dynamic beam weights may be based on an eigenvector of the channel correlation matrix. Additionally, the implementations further include applying the set of dynamic beam weights to an antenna array.

Abstract: Methods, systems, and devices for wireless communication are described. In some systems, a user equipment (UE) may receive a control message indicating a reference signal configuration for beam calibration by the UE based on a beamforming characterization status. The UE may receive a set of beam calibration reference signals based on the reference signal configuration. The UE may measure the set of beam calibration reference signals and generate a set of beamforming weights for use in communications by the UE based on the measuring and the beamforming characterization status. In some cases, the UE may transmit or forward a beamforming codebook based on the beamforming weights to a network entity. The network entity or the UE may forward the beamforming codebook to other UEs of a same design class as the UE.