Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select two transmit beams from a plurality of beams that the UE is capable of forming using an antenna array of the UE that includes a plurality of antenna elements, wherein the two transmit beams are to be used to transmit two corresponding layers of information; determine, after selecting the two transmit beams, a phase difference to be applied to the two transmit beams based at least in part on the two transmit beams; and transmit the information on the two corresponding layers concurrently via the two transmit beams using the phase difference. Numerous other aspects are provided.

Abstract: Techniques are described for wireless communication. A first method includes sensing an indication of first radio access technology (RAT) communications occupying a shared radio frequency spectrum band; and configuring, in response to the sensing, at least one parameter of a second RAT used by a device to contend for access to the band. A second method includes randomly selecting a number from a range of numbers extending between a lower bound and an upper bound; contending for access to a shared radio frequency spectrum band by performing an extended clear channel assessment (ECCA) procedure over a plurality of CCA slots, the plurality of CCA slots including a first number of CCA slots equal to the upper bound; and winning contention for access to the band after determining, while performing the ECCA procedure, that the band is available for a second number of CCA slots equal to the randomly selected number.

Abstract: Techniques to reduce the transmission overheads in a communication system are disclosed. In an embodiment, a method described herein relates to the elimination of redundant padding to realize an integer number of FEC code-words during the FEC-encoding process of transmission as well as the reduction/elimination of redundant padding to realize an integer number of transmission symbols during the subcarrier modulation mapping process of transmitting OFDM/ACMT/DMT symbols. The techniques are described in the context of a communication system based on the MoCA specification. Furthermore, techniques for channel-profiling, channel-estimation and bandwidth request/grant signaling that facilitate the realization of the method of reduction of transmission overheads in a MoCA system are also described.

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. Some wireless communications systems may support communications between a base station and a user equipment (UE) on multiple carriers. A UE may maintain a connection with a base station on a first carrier (e.g., an anchor carrier), and the UE may use a discontinuous reception (DRX) cycle on a second carrier. The DRX cycle may include scheduled on-durations during which the UE may monitor the second carrier for signaling from the base station. To reduce the power consumption at the UE associated with repeatedly monitoring scheduled on-durations, the base station may transmit wake-up signaling to the UE on the first carrier to identify the on-durations that include data from the base station. Accordingly, the UE may monitor these on-durations for the data and avoid monitoring other on-durations to limit power consumption.

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: Methods, systems, and devices for wireless communication are described for transmitting a first signal corresponding to a symbol so as to cover a geographic sector with via analog beamforming, transmitting, using analog beamforming and a second port, a second signal corresponding to the symbol, wherein aspects of the symbol are phase modulated with respect to the first signal such that corresponding aspects of a combined signal are beam-formed in one or more directions that at least partially overlap the geographic sector, a receiver receives the combined signal and from it determines a preferred refined beam for subsequent transmissions and transmits an indicator that includes the preferred refined beam, and the transmitter receives an indication from a receiver identifying one or more aspects of the combined signal, and determining a refined beam for subsequent transmissions based at least in part on the indication.

Abstract: Methods, systems, and devices for wireless communication are described. Some wireless communications systems may support multi-band operation. Different frequency bands may experience different communication characteristics (e.g., frequency-dependent fading), which may result in undesirable interference patterns and/or coverage gaps. The described techniques provide for channel access methods for multi-band operation. The channel access methods may allow for improved throughput for a wireless communications system. Additionally or alternatively, the described techniques may improve energy efficiency for communicating devices, reduce signaling overhead, or otherwise benefit a wireless communications system. Generally, the described techniques provide for efficient anchoring of high-band communications to low-band transmissions.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure a first sub-band and a second sub-band of a system bandwidth for communication with a user equipment (UE). The base station may determine a spatial quasi co-location (QCL) relationship between the first sub-band and the second sub-band and may transmit signaling to the UE that indicates the determined spatial QCL relationship. Upon receiving the signaling, the UE may derive, based on the indicated spatial QCL relationship, spatial parameters (e.g., beam width, pointing angle, etc.) for communication with the base station via the second sub-band. The spatial parameters may be derived based on spatial parameters used for reception of a downlink transmission from the base station via the first sub-band. Subsequently, the UE may communicate with the base station via the second sub-band using the derived spatial parameters.

Abstract: Aspects of the present disclosure provide various procedures and methods for accelerated secondary cell (SCell) activation when carrier aggregation (CA) is configured. A scheduling entity receives, from a network entity, an indication of anticipated data for a user equipment (UE) in an idle mode. The scheduling entity determines supplemental wake-up information based on the carrier aggregation capability of the PCell. The scheduling entity transmits a wake-up message to the UE. The wake up message is configured to cause the UE to wake up in a CA configuration using the PCell and one or more SCells, based on the supplemental wakeup information.

Abstract: An apparatus is disclosed for a multi-band millimeter-wave (mmW) antenna array and radio-frequency integrated circuit (RFIC) module. In an example aspect, the apparatus includes a multi-band mmW antenna array and RFIC module with a first antenna array, a second antenna array, and at least one radio-frequency front-end integrated circuit. The first antenna array includes at least two first antenna elements and is tuned to a first mmW frequency band. The second antenna array includes at least two second antenna elements and is tuned to a second mmW frequency band. The at least one radio-frequency front-end integrated circuit includes at least two first transceiver chains and at least two second transceiver chains. The at least two first transceiver chains are respectively coupled to the at least two first antenna elements, and the at least two second transceiver chains are respectively coupled to the at least two second antenna elements.

Abstract: Aspects of the disclosure relate to methods and apparatus of wireless communication to support frequency division multiplexing (FDM) of multiple waveforms. The methods and apparatus schedule FDM symbols where the scheduling of the FDM symbols is selectively based on one or more waveform parameters during a time interval when the FDM symbols are transmitted. The FDM symbols are then transmitted over the time interval. Further aspects also include the reception of the FDM symbols in a receiver where the waveform parameters are applied for decoding based on application of the waveform parameters.

Abstract: Certain aspects of the present disclosure relate to communication systems, and more particularly, to control resource sets (coresets) for transmitting physical downlink control channels using either a single-carrier waveform or a multicarrier waveform in communications systems operating according to new radio (NR) technologies. In an exemplary method, a base station may determine whether a control resource set (coreset), of time and frequency resources within a control region of system bandwidth and configured for a user equipment (UE), conveys a physical downlink control channel (PDCCH) via a single-carrier waveform or a multicarrier waveform, and transmit the PDCCH to the UE using the determined waveform.

Abstract: Methods, systems, and devices for wireless communications are described that provide for refinement of receive beam beamforming parameters at a user equipment (UE). A UE may transmit two or more signals in an uplink transmission that have different beamforming parameters. A base station receiving the uplink transmission may measure the two or more signals, and identify a first signal of the two or more signals based at least in part on the measuring. The base station may inform the UE of the identified first signal, which the UE may use to set receive beam beamforming parameters for one or more subsequent downlink transmissions.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure a first sub-band and a second sub-band of a system bandwidth for communication with a user equipment (UE). The base station may determine a spatial quasi co-location (QCL) relationship between the first sub-band and the second sub-band and may transmit signaling to the UE that indicates the determined spatial QCL relationship. Upon receiving the signaling, the UE may derive, based on the indicated spatial QCL relationship, spatial parameters (e.g., beam width, pointing angle, etc.) for communication with the base station via the second sub-band. The spatial parameters may be derived based on spatial parameters used for reception of a downlink transmission from the base station via the first sub-band. Subsequently, the UE may communicate with the base station via the second sub-band using the derived spatial parameters.

Abstract: Methods, systems, and devices for wireless communication are described. A first device may receive a channel reservation request from a second device, over a shared or unlicensed radio frequency spectrum band, the channel reservation request including a first expected response time duration to receive a channel reservation response in response to the channel reservation request. The first wireless device may transmit a channel reservation response in response, and receive a directional transmission according to the channel reservation request. The second device may transmit a directional channel reservation request on a transmit beam, the directional channel reservation request including a first expected response time duration to receive a channel reservation response the first device in response to the directional channel reservation request.

Abstract: Aspects of the disclosure relate to methods and apparatus of wireless communication to support frequency division multiplexing (FDM) of multiple waveforms. The methods and apparatus schedule FDM symbols where the scheduling of the FDM symbols is selectively based on one or more waveform parameters during a time interval when the FDM symbols are transmitted. The FDM symbols are then transmitted over the time interval. Further aspects also include the reception of the FDM symbols in a receiver where the waveform parameters are applied for decoding based on the waveform parameters.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may perform calibration of a transceiver chain to maintain or improve operation of a device or comply with legal or protocol requirements. The UE may receive one or more wireless signals indicating a first set of resources where the first device is scheduled to transmit or receive communications. The UE may calibrate a wireless transceiver chain of the first device in a second set of resources. The second set of resources excludes the first set of resources and includes at least a portion of a third set of resources. The third set of resources are resource in which the first device has an option to transmit or receive communications based on a protocol configuration.

Abstract: Various aspects described herein relate to techniques for synchronization signal transmissions in wireless communications (e.g., 5th Generation New Radio). In an aspect, a method includes detecting that a medium in a shared spectrum is busy, and delaying a transmission of a synchronization signal (SS) block in the shared spectrum in response to detecting that the medium is busy. The method further includes detecting that the previously busy medium is free, and transmitting, in response to detecting that the medium is free, a filler signal before transmitting the SS block in the shared spectrum, and the SS block includes one or more discovery reference signals (DRSs).

Abstract: Methods, systems, and devices for wireless communication are described. A base station may perform an access procedure to obtain access to a shared radio frequency spectrum band during a measurement window and generate a synchronization signal (SS) burst comprising a plurality of SS blocks. The base station may perform a beam sweeping first transmission of the SS burst over the shared radio frequency spectrum based at least in part on the access procedure. In the first transmission or a second transmission, the base station may transmit at least one of a first indication of a time of access to the shared radio frequency spectrum band with respect to the measurement window, a second indication of a transmission beam associated with the SS block, and a third indication of a quantity of remaining SS blocks from the plurality of SS blocks to follow the SS block in the measurement window.