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    CHANNEL ESTIMATION REFERENCE SIGNALS FOR PRE-EQUALIZATION
    1.
    发明申请
    CHANNEL ESTIMATION REFERENCE SIGNALS FOR PRE-EQUALIZATION 有权

    公开(公告)号：US20250097079A1

    公开(公告)日：2025-03-20

    申请号：US18469771

    申请日：2023-09-19

    Applicant: QUALCOMM Incorporated

    Inventor： Tom BARAK ,  Michael LEVITSKY ,  Daniel PAZ ,  Assaf TOUBOUL ,  Alexander SVERDLOV

    IPC: H04L25/02

    Abstract: Methods, systems, and devices that support channel estimation reference signals for pre-equalization are described. In some examples, channel state information (CSI) for a link between a user equipment (UE) and another wireless device may be acquired by the UE based on samples of a downlink reference signal transmitted from the UE to the wireless device. Specifically, the wireless device (e.g., an extended reality (XR) device) may obtain samples of the downlink reference signal (e.g., a channel estimation reference signal) and report or indicate (e.g., transmit) the samples to the UE via an uplink transmission. For example, the reference signals may be sampled at the wireless device side, and CSI may be obtained using the samples signaled back to the UE by the wireless device. The UE may perform channel estimation based on the received samples, which may enable transmit pre-equalization of signals sent to the wireless device.

    RS PATTERN ASSOCIATED WITH DYNAMIC SPUR DETECTION
    2.
    发明公开
    RS PATTERN ASSOCIATED WITH DYNAMIC SPUR DETECTION 审中-公开

    公开(公告)号：US20230318766A1

    公开(公告)日：2023-10-05

    申请号：US17651400

    申请日：2022-02-16

    Applicant: QUALCOMM Incorporated

    Inventor： Alexander SVERDLOV ,  Michael LEVITSKY ,  Assaf TOUBOUL ,  Gideon Shlomo KUTZ ,  Guy WOLF ,  Shay LANDIS

    IPC: H04L5/00 ,  H04W72/04

    CPC classification number: H04L5/0048 ,  H04W72/042

    Abstract: A base station may configure a user equipment (UE) with a subset of reference signal (RS) configurations among a set of RS configurations, and transmit a plurality of RSs based on the subset of RS configurations. The RS may be a demodulation RS (DMRS). The plurality of RSs may be configured to span each of the plurality of resource elements (REs) in the active bandwidth part (BWP). The UE may receive the plurality of RSs based on the subset of RS configurations and perform a spur detection based on the plurality of RSs received based on the subset of RS configurations. Each RS configuration of the set of RS configurations may be associated with at least one of the subset of RS configurations that is associated with the plurality of RSs spanning each of the plurality of REs in the active BWP.

    EXTENDED REALITY DEVICE SYNCHRONIZATION MANAGEMENT
    3.
    发明申请
    EXTENDED REALITY DEVICE SYNCHRONIZATION MANAGEMENT 有权

    公开(公告)号：US20250081129A1

    公开(公告)日：2025-03-06

    申请号：US18240820

    申请日：2023-08-31

    Applicant: QUALCOMM Incorporated

    Inventor： Daniel PAZ ,  Assaf TOUBOUL ,  Michael LEVITSKY ,  Tom BARAK ,  Alexander SVERDLOV

    IPC: H04W56/00

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform an initialization procedure with an extended reality (XR) device including a time synchronization and a frequency synchronization. The UE may receive, from the XR device and at a first periodicity, first pilot signals, and may transmit, based on receiving the first pilot signals, a first control message indicating a first set of correction factors to apply to at least one of the time synchronization or the frequency synchronization. The UE may transmit, to the XR device and at a second periodicity, a second pilot signal, and may receive, from the XR device, a second control message including samples of the second pilot signal. The UE may transmit, based on the samples, a third control message indicating a second set of correction factors to apply to the time synchronization between the UE and the XR device.

    SPLIT CYCLIC PREFIX BEAM GAIN MEASUREMENT
    4.
    发明申请
    SPLIT CYCLIC PREFIX BEAM GAIN MEASUREMENT 有权

    公开(公告)号：US20250038853A1

    公开(公告)日：2025-01-30

    申请号：US18716652

    申请日：2023-01-04

    Applicant: QUALCOMM Incorporated

    Inventor： Alexander SVERDLOV ,  Igor GUTMAN

    IPC: H04B10/294 ,  H04B17/309

    Abstract: Methods, systems, and devices for wireless communications are described. For instance, a wireless device may measure a first portion of a cyclic prefix (CP) of a wireless transmission received using a first subset of a set of analog receive elements. The wireless device may measure a second portion of the CP of the wireless transmission using a second subset of the set of analog receive elements. The wireless device may determine a beam gain for the set of analog receive elements based on measuring the first portion of the CP received using the first subset and the second portion of the CP received using the second subset. In some examples, measuring using the first subset and the second subset may be associated with improved automatic gain control performance and/or transmission power control as compared to measuring with each of a set of analog receive elements.

    TECHNIQUES FOR DYNAMIC PRE-EQUALIZATION SWITCHING
    6.
    发明申请
    TECHNIQUES FOR DYNAMIC PRE-EQUALIZATION SWITCHING 有权

    公开(公告)号：US20240388478A1

    公开(公告)日：2024-11-21

    申请号：US18320017

    申请日：2023-05-18

    Applicant: QUALCOMM Incorporated

    Inventor： Tom BARAK ,  Assaf TOUBOUL ,  Michael LEVITSKY ,  Daniel PAZ ,  Alexander SVERDLOV

    IPC: H04L25/03 ,  H04B17/336 ,  H04L5/00

    Abstract: Methods, systems, and devices for wireless communications are described. In some examples, the first wireless device may transmit, to a second wireless device, a control message indicating a set of pre-equalization transmission schemes supported by the first wireless device for receipt of messaging pre-equalized by the second wireless device. The first wireless device may transmit a measurement report that indicates a measurement of a wireless channel between the first wireless device and the second wireless device, where the measurement may be a signal-to-interference and noise (SINR) measurement. The first wireless device may receive a control signal indicative of a first pre-equalization transmission scheme to be used by the second wireless device for pre-equalization based at least in part on the set of pre-equalization transmission schemes and the measurement. The first wireless device may receive, via the wireless channel, a downlink message pre-equalized in accordance with the first pre-equalization transmission scheme.

    DISCRETE FOURIER TRANSFORM SPREAD ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WAVEFORM PRE-EQUALIZATION
    8.
    发明申请
    DISCRETE FOURIER TRANSFORM SPREAD ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WAVEFORM PRE-EQUALIZATION 有权

    公开(公告)号：US20240430145A1

    公开(公告)日：2024-12-26

    申请号：US18338059

    申请日：2023-06-20

    Applicant: QUALCOMM Incorporated

    Inventor： Daniel PAZ ,  Michael LEVITSKY ,  Tom BARAK ,  Assaf TOUBOUL ,  Alexander SVERDLOV

    IPC: H04L27/01 ,  H04L5/00

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) waveform pre-equalization for MIMO communications. A receiver device, such as an extended reality (XR) device, may be configured to offload a portion of data processing to a companion device, such as a user equipment (UE). In some aspects, the UE may generate a DFT-S-OFDM waveform and may apply a pre-equalization to the DFT-S-OFDM waveform. Applying the pre-equalization to the DFT-S-OFDM waveform may include applying a minimum mean square error (MMSE) pre-equalization to the DFT-S-OFDM waveform. The receiver device may receive the pre-equalized DFT-S-OFDM waveform from the UE and may process the pre-equalized DFT-S-OFDM waveform. For example, the receiver device may decode the pre-equalized DFT-S-OFDM waveform without performing fast Fourier transform (FFT) or inverse discrete Fourier transform (IDFT) operations.

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