Butler matrix steering for multiple antennas

    公开(公告)号:US11923619B2

    公开(公告)日:2024-03-05

    申请号:US17126983

    申请日:2020-12-18

    CPC classification number: H01Q3/40 H04B7/0421 H04B7/0617

    Abstract: Aspects of disclosure relate to beam steering at a multi-antenna device. The device receives an activation signal to activate one or more input ports of a Butler matrix and outputs signals from all output ports of the Butler matrix based on activation of the one or more input ports. The signals output from the output ports have varying phase shifts relative to each other. Moreover, the device phase shifts the signals output from the output ports via a plurality of phase shifters respectively coupled to the output ports. The phase shifted signals have further varying phase shifts relative to each other and a phase difference between adjacent phase shifted signals. Each one of a plurality of antenna elements at the device receives a phase shifted signal from an associated phase shifter and outputs a beam based on the phase shifted signal received from the associated phase shifter.

    DEDICATED PILOT SIGNALS ASSOCIATED WITH RADIO FREQUENCY IMPAIRMENT COMPENSATION

    公开(公告)号:US20240031085A1

    公开(公告)日:2024-01-25

    申请号:US17868049

    申请日:2022-07-19

    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for dedicated pilot signals associated with radio frequency impairment compensation. In some aspects, a user equipment (UE) and a network entity may support a signaling mechanism according to which the UE may measure and report, to the network entity, an imbalance between an in-phase (I) component and a quadrature (Q) component of a modulated signal. For example, the UE may request the network entity to transmit an out-of-band pilot signal to enable frequency domain residual side band (FDRSB) estimation at the UE and the UE may transmit measurement information associated with the IQ imbalance or the FDRSB estimation to the network entity. The network entity may receive the measurement information and compensate or correct signaling in accordance with the received measurement information.

    Tone reservation signaling outside of an allocated bandwidth

    公开(公告)号:US11877273B2

    公开(公告)日:2024-01-16

    申请号:US17353357

    申请日:2021-06-21

    CPC classification number: H04W72/0453 H04L27/2614 H04W72/1268

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, an indication to transmit tone reservation signaling, configured to reduce a peak-to-average-power-ratio for one or more of the UE or the base station, on one or more subcarriers outside of an allocated bandwidth that is allocated for an uplink communication scheduled for the UE. The UE may transmit, to the base station, signaling that includes the uplink communication within the allocated bandwidth and the tone reservation signaling on the one or more subcarriers. Numerous other aspects are provided.

    Techniques for intra-message antenna selection diversity

    公开(公告)号:US11856572B2

    公开(公告)日:2023-12-26

    申请号:US17317348

    申请日:2021-05-11

    CPC classification number: H04W72/1263 H04B1/713

    Abstract: Methods, systems, and devices for wireless communications are described. In a wireless communications system, a user equipment (UE) may be configured to use intra-message antenna selection diversity (ASD). The UE may transmit a first portion of a scheduled message within a time interval using a first antenna element of the UE based on an intra-message antenna diversity configuration. The intra-message antenna diversity configuration may indicate a set of antennas available for transmission of the scheduled message. In some cases, the UE may transmit, within the same time interval, at least a portion of the scheduled message using at least a second antenna element of the UE that is different from the first antenna element. In some cases, a receiving UE may decode the first portion and the second portion of the scheduled message based on the intra-message antenna diversity configuration.

    LENS DESIGN FOR FULL-DUPLEX COMMUNICATION
    16.
    发明公开

    公开(公告)号:US20230367105A1

    公开(公告)日:2023-11-16

    申请号:US17742146

    申请日:2022-05-11

    CPC classification number: G02B13/0055 G02B1/115

    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for lens design for full-duplex communication. In some aspects, a device may use a lens design that enables full-duplex operation through a lens by facilitating an avoidance or mitigation of self-interference during full-duplex operation. The lens may have a first, antenna-facing surface and a second, outward-facing surface and, to avoid or mitigate self-interference due to reflection off the lens, the first surface may have a first curvature associated with a relatively small radius. In such examples, the device may transmit wireless signaling from a transmitting element and a reflection off the lens may be dispersed or otherwise oriented away from a receiving element in accordance with a design of the first curvature. In some implementations, the lens may include an anti-reflective coating to further reduce reflection off the lens.

    Boosted noncoherent modulation
    17.
    发明授权

    公开(公告)号:US11799620B2

    公开(公告)日:2023-10-24

    申请号:US17184406

    申请日:2021-02-24

    Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may encode a set of data bits on a set of subcarriers based on a boosting factor, and map the set of encoded data bits to a resource block including a first subset of subcarriers corresponding to the set of encoded data bits and a second subset of subcarriers corresponding to a set of null bits. The transmitting device may generate and transmit a signal including the set of encoded data bits. A receiving device may receive a modulated signal on a set of subcarriers, and de-map the modulated signal to a first subset of subcarriers and a second subset of subcarriers based on a boosting factor. The receiving device may decode the first subset of subcarriers to a first set of data bits and the second subset of subcarriers to a second set of data bits.

    ADAPTATION OF AMPLITUDE AND PHASE SHIFT KEYING (APSK) MODULATION

    公开(公告)号:US20230318900A1

    公开(公告)日:2023-10-05

    申请号:US17707845

    申请日:2022-03-29

    CPC classification number: H04L27/36 H04L27/3405 H04L27/38

    Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for determining a constellation configuration for an amplitude phase shift keying (APSK) modulation scheme. The constellation configuration may be based on communication impairment information that is indicative of at least one communication impairment expected to impair a single-carrier waveform communication. Examples of communication impairments may include additive white gaussian noise (AWGN), phase noise, non-linear distortion, or any combination thereof, among other examples. Examples of a constellation configuration may include a quantity of rings in a constellation pattern associated with the APSK modulation scheme, a quantity of constellation points associated the rings, a ring radius associated with one or more rings, a phase offset to one or more rings, and a mapping of data bits to one or more constellation points, among other examples.

    Modulated downlink reference signal for low power operations

    公开(公告)号:US11736326B2

    公开(公告)日:2023-08-22

    申请号:US17334026

    申请日:2021-05-28

    Abstract: Methods, systems, and devices for wireless communication are described. A communication device may receive control signaling indicating a downlink reference signal configuration, for example, a demodulation reference signal (DMRS) configuration. The communication device may receive a downlink reference signal (e.g., a DMRS) over a downlink control channel (e.g., a physical downlink control channel (PDCCH)) during an initial symbol duration of a transmission time interval (TTI). The downlink reference signal may include a set of bits including a first subset of bits including network temporary identifier bits and a second subset of bits including constellation bits associated with a downlink data channel (e.g., a physical downlink shared channel (PDSCH)). The communication device may process the downlink reference signal (e.g., a DMRS) based on the downlink reference signal configuration (e.g., a DMRS configuration).

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