Abstract: Various aspects generally relate to communication. In some aspects, a receiver may receive, from a transmitter over a wired infrastructure, a frequency division multiplexed (FDM) signal. The receiver may map the FDM signal to a spatial division multiplexed (SDM) signal including multiple spatial layers, wherein the SDM signal mapped to the FDM signal compensates for a frequency error between the transmitter and the receiver. The receiver may provide the SDM signal to a multiple-input multiple-output (MIMO) transceiver. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may support a collimator (e.g., a reflector antenna or lens) with an aperture large enough to support multiple beams (e.g., instead of a single beam). The wireless device may perform electronic measurements (e.g., may dither across multiple beams using the phased antenna array supported by the large aperture) and fine tuning of the beam. For example, the wireless device may receive reference signals during one or more measurement opportunities via multiple beams. The wireless device may determine a preferred (e.g., different) beam based on the measurements, without yet having actually changed a physical orientation of the wireless device. Having identified a preferred beam, the wireless device may mechanically adjust its orientation towards the preferred beam (e.g., and the preferred beam may in fact support improved or more reliable wireless communications as indicated by the electronic measurements).

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, a synchronization raster configuration indicating that a first layer of each component carrier of a plurality of component carriers associated with a wireless-backhaul-over-cable configuration is to be used as a reference layer for a cell acquisition synchronization raster. The UE may communicate with the network node using the wireless-backhaul-over-cable configuration and in accordance with the synchronization raster configuration. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A first device may select a first beam and a second beam from a set of beams for communicating with a second device. The first device may perform a beam refinement procedure of the first beam to generate a first multicast autonomous beam refinement tree. The first device may determine a trigger for performing the beam refinement procedure of the second beam, and the first device may generate a second multicast autonomous beam refinement tree. The first device may communicate with the second device using the second beam.

Abstract: Various aspects of the present disclosure generally relate to communication. In some aspects, a first device may determine a frequency division multiplexing (FDM) configuration for a set of component carriers associated with a cable frequency spectrum, wherein each component carrier in the set of component carriers is associated with a number of multiple input multiple output (MIMO) layers. The first device may communicate with a second device over a cable infrastructure according to the FDM configuration for the set of component carriers. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques wireless communication at a first wireless node generally including communicating with a second wireless device using a first beam, detecting at least one condition indicative of receiver saturation at the first wireless device or the second wireless device, and taking at least one action designed to mitigate the receiver saturation after detecting the at least one condition.

Abstract: Certain aspects of the present disclosure provide a method for wireless communications by a user equipment (UE), generally including receiving assistance information, from a network entity, indicating a mapping between beams across different remote radio heads (RRHs) and using the assistance information to perform beam management when the UE is moving from the coverage area of one RRH to the coverage area of another RRH.

Abstract: Methods, systems, and devices for wireless communications are described that asynchronous carrier aggregation, including between high frequency band and lower frequency band transmissions. A user equipment (UE) may be configured to monitor transmissions in a first frequency band and a second frequency band. The UE may measure a timing difference between transmissions in the first frequency band and one or more of the transmissions in the second frequency band, and transmit an indication of the timing difference to a base station. The base station may use the timing difference to determine whether the UE is to use asynchronous carrier aggregation. If the base station determines that the UE is to use asynchronous carrier aggregation, the base station may configure the UE to observe at least a minimum amount of delay when conducting uplink signaling via one of the frequency bands.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may use transmissions causing power density exposure (PDE) to nearby users. To reduce the PDE of an antenna module (e.g., below a maximum PDE threshold), the UE may implement a shielding strip around the antenna module. For example, the antenna module may include a substrate having a first surface and a set of antenna elements on the first surface. The shielding strip may enclose the set of antenna elements of the antenna module and extend away from the first surface above the antenna elements. The shielding strip may reduce PDE outside a field of view of the antenna module. Additionally, in some cases, the placement of the antenna module in the UE and the materials used for constructing the UE may further reduce PDE.

Abstract: Provided are electrochemical secondary cells that exhibit excellent abuse tolerance, deep discharge and overcharge conditions including at extreme temperatures and remain robust and possess excellent performance. Cells as provided herein include: a cathode a polycrystalline cathode electrochemically active material including the formula Li1+xMO2+y, wherein ?0.9?x?0.3, ?0.3?y?0.3, and wherein M includes Ni at 80 atomic percent or higher relative to total M, an anode including an anode electrochemically active material defined by an electrochemical redox potential of 400 mV or greater vs Li/Li+.

Abstract: Methods, systems, and devices for wireless communications are described that asynchronous carrier aggregation, including between high frequency band and lower frequency band transmissions. A user equipment (UE) may be configured to monitor transmissions in a first frequency band and a second frequency band. The UE may measure a timing difference between transmissions in the first frequency band and one or more of the transmissions in the second frequency band, and transmit an indication of the timing difference to a base station. The base station may use the timing difference to determine whether the UE is to use asynchronous carrier aggregation. If the base station determines that the UE is to use asynchronous carrier aggregation, the base station may configure the UE to observe at least a minimum amount of delay when conducting uplink signaling via one of the frequency bands.

Abstract: Methods, systems, and devices for wireless communications are described. A first device may select a first beam and a second beam from a set of beams for communicating with a second device. The first device may perform a beam refinement procedure of the first beam to generate a first multicast autonomous beam refinement tree. The first device may determine a trigger for performing the beam refinement procedure of the second beam, and the first device may generate a second multicast autonomous beam refinement tree. The first device may communicate with the second device using the second beam.

Abstract: Methods, systems, and devices for wireless communications are described that asynchronous carrier aggregation, including between high frequency band and lower frequency band transmissions. A user equipment (UE) may be configured to monitor transmissions in a first frequency band and a second frequency band. The UE may measure a timing difference between transmissions in the first frequency band and one or more of the transmissions in the second frequency band, and transmit an indication of the timing difference to a base station. The base station may use the timing difference to determine whether the UE is to use asynchronous carrier aggregation. If the base station determines that the UE is to use asynchronous carrier aggregation, the base station may configure the UE to observe at least a minimum amount of delay when conducting uplink signaling via one of the frequency bands.

Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support adaptation of digital pre-distortion (DPD) coefficients based on a temperature of a user equipment (UE). The UE may determine a power offset value based on a first temperature value associated with a training procedure for the UE, a second temperature value associated with the UE, and a constant value. The training procedure may be associated with multiple sets of coefficients for the UE. The UE may apply the power offset value to a transmission power level for transmission of a message. The UE may determine a set of coefficients of the multiple sets of coefficients based on the training procedure and the power offset value applied to the transmission power level. The UE may apply the coefficients to a DPD engine of the UE to generate the message for transmission at the transmission power level.

Abstract: Certain aspects of the present disclosure provide techniques wireless communication at a first wireless node generally including communicating with a second wireless device using a first beam, detecting at least one condition indicative of receiver saturation at the first wireless device or the second wireless device, and taking at least one action designed to mitigate the receiver saturation after detecting the at least one condition.

Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support adaptation of digital pre-distortion (DPD) coefficients based on a temperature of a user equipment (UE). The UE may determine a power offset value based on a first temperature value associated with a training procedure for the UE, a second temperature value associated with the UE, and a constant value. The training procedure may be associated with multiple sets of coefficients for the UE. The UE may apply the power offset value to a transmission power level for transmission of a message. The UE may determine a set of coefficients of the multiple sets of coefficients based on the training procedure and the power offset value applied to the transmission power level. The UE may apply the coefficients to a DPD engine of the UE to generate the message for transmission at the transmission power level.

Abstract: Methods, apparatuses, and computer-readable medium for DPD are provided. An example method may include receiving, from a base station, an uplink grant associated with one or more resources. The example method may further include transmitting, to the UE via the one or more resources, a DPD training signal at a first port of a plurality of ports. The example method may further include receiving, at a second port of the plurality of ports, the DPD training signal.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure a system bandwidth of shared spectrum partitioned into a plurality of bandwidth parts based on interference associated with each of the plurality of bandwidth parts. The base station may then transmit the configuration of the system bandwidth to a plurality of devices. A UE may receive, from a base station, a configuration of a system bandwidth of shared spectrum. The system bandwidth may be partitioned into a plurality of bandwidth parts based on interference associated with each of the plurality of bandwidth parts. The UE may then communicate with the base station on at least one of the bandwidth parts.

Abstract: Certain aspects of the present disclosure provide a method for wireless communications by a user equipment (UE), generally including receiving assistance information, from a network entity, indicating a mapping between beams across different remote radio heads (RRHs) and using the assistance information to perform beam management when the UE is moving from the coverage area of one RRH to the coverage area of another RRH.

Abstract: Methods, systems, and devices are described for wireless communication at a device. A Long Term Evolution Unlicensed (LTE-U) device may transmit an enhanced preamble that may be understood by Wireless Local Area Network (WLAN) devices, in addition to conveying a characteristic that is detectable by receiving LTE-U devices. The transmitting LTE-U device may generate the enhanced preamble by generating a first training field and a second training field. The characteristic that is detectable by receiving LTE-U devices may be a phase shift between the first and second training fields. Additionally or alternatively, the characteristic may be a sequence or tone mapping of the first or second training field. In some cases, the transmitting LTE-U device may introduce a third training field to the preamble which serves as the characteristic.