TECHNIQUES FOR RESOURCE RESERVATION FOR A RETRANSMISSION

    公开(公告)号:US20230362738A1

    公开(公告)日:2023-11-09

    申请号:US17736867

    申请日:2022-05-04

    Abstract: Methods, systems, and devices for wireless communications are described. A network entity may determine a number of resources for next transmissions following a first transmission. For example, a user equipment (UE) may calculate an average mutual information (MI) of a single log likelihood ratio (LLR) and an MI for each code block. The UE may transmit feedback indicating a quantity of resources to achieve a target MI based on the calculated averages. A wireless device may monitor a feedback buffer utilization associated with the UE. A network entity may retransmit existing code blocks or output a transmission using repetition based on the monitoring and utilization thresholds. The network entity may indicate to the UE a latency level code block attribute and increase a quantity of resources for following retransmissions by a boosting factor based on the latency level and a threshold.

    BLIND COMMON PHASE ERROR AND RESIDUAL CARRIER FREQUENCY OFFSET MITIGATION

    公开(公告)号:US20230327829A1

    公开(公告)日:2023-10-12

    申请号:US17717682

    申请日:2022-04-11

    CPC classification number: H04L5/0048 H04L27/2601 H04L25/0238 H04W72/1263

    Abstract: Methods, systems, and devices for wireless communications are described. The described techniques support blind common phase error (CPE) and residual carrier frequency offset mitigation. Generally, the described techniques provide for blind CPE mitigation at a receiving device without a phase tracking reference signal (PTRS) associated with less overhead and improved performance as compared to use of a PTRS to mitigate CPE. A receiving device may receive a shared channel message in a scheduled shared channel allocation in accordance with a PTRS configuration that omits a PTRS allocation based on a capability of the receiving device to apply blind CPE mitigation for shared channel receptions. In some examples, with a single DMRS symbol allocation, blind CPE mitigation for each subsequent data symbol of a shared channel message may be based on the blind CPE estimation for the previous symbol, which may enable robust mitigation of a residual carrier frequency offset.

    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).

    Channel and power amplifier nonlinearity estimation

    公开(公告)号:US11626894B2

    公开(公告)日:2023-04-11

    申请号:US17378499

    申请日:2021-07-16

    Abstract: Methods, systems, and devices for wireless communication are described. A communication device, such as a user equipment (UE) may receive a set of demodulation reference signal (DMRS) samples including a first subset of DMRS samples associated with a first power level and a second subset of DMRS samples associated with a second power level. The UE may perform a digital post distortion operation based on the first subset of DMRS samples associated with the first power level and the second subset of DMRS samples associated with the second power level. The UE may receive the wireless communication based on performing the digital post distortion operation.

    OVER THE AIR DIGITAL PRE-DISTORTION MEASUREMENTS

    公开(公告)号:US20230014042A1

    公开(公告)日:2023-01-19

    申请号:US17377721

    申请日:2021-07-16

    Abstract: Methods, systems, and devices for wireless communications are described. The method includes receiving, from a base station, control signaling identifying a measurement configuration for one or more non-linear estimation measurements of reference signals associated with a power amplifier configuration of the base station, receiving, from the base station, the reference signals on a set of resources identified by the measurement configuration, performing one or more non-linear estimation measurements associated with the power amplifier configuration of the base station based on the received reference signals, and transmitting, to the base station according to the measurement configuration, a measurement report based on the one or more non-linear estimation measurements.

    Massive MIMO physical layer based cryptography

    公开(公告)号:US11528600B2

    公开(公告)日:2022-12-13

    申请号:US16581039

    申请日:2019-09-24

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless device may receive a sounding waveform via a reciprocal wireless channel. The wireless device may estimate one or more channel parameters associated with the reciprocal wireless channel based at least in part on the sounding waveform. The wireless device may generate a cryptographic key based at least in part on the one or more channel parameters associated with the reciprocal wireless channel. The wireless device may establish a secure communication session over the reciprocal wireless channel based at least in part on the cryptographic key. Numerous other aspects are provided.

    Lossless compression of channel state feedback

    公开(公告)号:US11476998B2

    公开(公告)日:2022-10-18

    申请号:US16937833

    申请日:2020-07-24

    Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for efficiently reporting channel state feedback for a set of subbands. As an example, a user equipment (UE) may receive a set of reference signals on the set of subbands and determine a respective channel quality indicator (CQI) index for each of the set of subbands based on the reference signals. The UE may then transmit indications of CQI indices for different subbands of the set using variable length indications, such as indications that include different numbers of bits. Since, in some examples, a small length or number of bits may be allocated for reporting CQI indices with a high probability of being reported, overhead in a wireless communications system may be reduced.

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