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154 条记录 (耗时 0.039 秒)

    Signaling strategy for advanced receiver with interference cancellation and suppression
    61.
    发明授权
    Signaling strategy for advanced receiver with interference cancellation and suppression 有权

    公开(公告)号：US10939322B2

    公开(公告)日：2021-03-02

    申请号：US16538685

    申请日：2019-08-12

    申请人： QUALCOMM Incorporated

    发明人： Seyong Park ,  Wanshi Chen ,  Hao Xu ,  Wei Zeng ,  Renqiu Wang ,  Peter Gaal ,  Tingfang Ji ,  John Edward Smee

    IPC分类号： H04W28/04 ,  H04B7/08 ,  H04J11/00 ,  H04L5/00 ,  H04L25/02 ,  H04L1/00 ,  H04W72/08 ,  H04B7/0452

    摘要： Signaling strategies for an advanced receiver with interference cancellation (IC) and suppression is discussed. Upon enablement of an advanced interference cancellation procedure according to the disclosure, transmitters within the enabled area transmit according to transmission restriction configurations that provide transmission limits based on either frequency, time, or scheduling. The restrictions on the transmitters reduces the complexity of processing by neighboring advanced receivers for cancellation of interference from the restricted transmitters. At the advanced receiver, transmission information, such as scheduling, reference signal (RS), resource block (RB) allocation, and the like, may either be determined through blind detection or received directly through signaling. The advanced receiver may use this transmission information associated with each interfering signal to detect, decode, and subtract the interfering signals from the received transmissions.

    Devices and methods for facilitating multiple synchronization channels within a single carrier
    63.
    发明授权
    Devices and methods for facilitating multiple synchronization channels within a single carrier 有权

    公开(公告)号：US10750457B2

    公开(公告)日：2020-08-18

    申请号：US15490830

    申请日：2017-04-18

    申请人： QUALCOMM Incorporated

    发明人： Wei Zeng ,  Wanshi Chen ,  Tingfang Ji ,  Peter Gaal ,  Hung Ly

    IPC分类号： H04L12/50 ,  H04W56/00 ,  H04L5/00 ,  H04W72/04

    摘要： Wireless communication devices are adapted to facilitate multiple synchronization channels within a single carrier. In some examples, an apparatus for wireless communication may transmit a first synchronization channel at a first frequency in a carrier bandwidth, and at least one additional synchronization channel at a different respective frequency in the carrier bandwidth. In some examples, an apparatus for wireless communication may scan a carrier bandwidth for one of a plurality of synchronization channels conveyed at different respective frequencies in the carrier bandwidth, and discover a synchronization channel from among the plurality of synchronization channels. The apparatus may further receive information conveyed over the discovered synchronization channel and utilize the information to access the carrier. Other aspects, embodiments, and features are also included.

    Uplink transmit diversity and precoding
    66.
    发明授权
    Uplink transmit diversity and precoding 有权

    公开(公告)号：US10594532B2

    公开(公告)日：2020-03-17

    申请号：US16228168

    申请日：2018-12-20

    申请人： QUALCOMM Incorporated

    发明人： Renqiu Wang ,  Hao Xu ,  Jing Jiang ,  Yi Huang ,  Wei Zeng ,  Wanshi Chen ,  Tingfang Ji

    IPC分类号： H04L27/26 ,  H04B7/0404 ,  H04B7/06 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0456 ,  H04J13/12

    摘要： A configurable new radio (NR) uplink (UL) transmission may use transmit diversity. A user equipment (UE) may identify an uplink transmission of at least one stream as using one of cyclic prefix orthogonal frequency division multiplexing or discrete Fourier transform spread orthogonal frequency division multiplexing. The UE may apply a precoding matrix to the at least one identified stream. The precoding matrix changes over time. The precoding matrix may change based on closed loop feedback, a precoding cycling pattern, and/or a code division multiplexing group. The UE may transmit the at least one identified stream from multiple antennas according to the applied precoding matrix.

    Frequency and time domain multiplexing for low peak-to-average power ratio (PAPR) waveform design with multiple streams
    67.
    发明授权
    Frequency and time domain multiplexing for low peak-to-average power ratio (PAPR) waveform design with multiple streams 有权

    公开(公告)号：US10567205B2

    公开(公告)日：2020-02-18

    申请号：US15674428

    申请日：2017-08-10

    申请人： QUALCOMM Incorporated

    发明人： Seyong Park ,  Sony Akkarakaran ,  Wei Zeng ,  Peter Gaal ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Tao Luo ,  Tingfang Ji

    IPC分类号： H04L27/26 ,  H04L5/00 ,  H04J11/00

    摘要： Methods, systems, and devices for wireless communications are described that support frequency and time domain multiplexing for low peak-to-average waveforms with multiple streams. A user equipment (UE) may identify sets of symbols associated with different streams (e.g., multiple single-carrier discrete Fourier transform (DFT)-spread waveforms), where each stream may be associated with a low peak-to-average power ratio (PAPR). In some cases, different waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM). The UE may further reduce the PAPR of the multiplexed waveforms by performing time division multiplexing (TDM) across the single-carrier streams, and sets of symbols that are not used by one waveform may be used by another waveform. Frequency domain phase ramps may be applied to align the multiplexed waveforms. Signals included in an uplink transmission according to these techniques may maintain properties similar to single-carrier waveforms, including a low PAPR.

    Low peak-to-average power ratio waveform design for frequency multiplexing of multiple streams
    68.
    发明授权
    Low peak-to-average power ratio waveform design for frequency multiplexing of multiple streams 有权

    公开(公告)号：US10530625B2

    公开(公告)日：2020-01-07

    申请号：US15873668

    申请日：2018-01-17

    申请人： QUALCOMM Incorporated

    发明人： Seyong Park ,  Wei Zeng ,  Peter Gaal ,  Hao Xu ,  Yi Huang ,  Renqiu Wang ,  Sony Akkarakaran ,  Tao Luo ,  Tingfang Ji

    IPC分类号： H04K1/10 ,  H04L27/26

    摘要： Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be configured with a transmission stream processor used to maintain a lower peak-to-average power ratio (PAPR) for uplink transmissions. In some cases, a UE may map modulated symbols of different signals (or waveforms) to interleaved subsets of frequency resources, and this form of frequency division multiplexing (FDM) may increase the PAPR of an uplink transmission. To reduce the PAPR of uplink transmissions, a transmission stream processor at the UE may support techniques for phase ramping modulated symbols in the time domain prior to mapping the symbols to the frequency resources. These techniques may help to ensure that the signals to be included in an uplink transmission are aligned in such a way that the PAPR of the uplink transmission is reduced.

    Uplink MIMO design
    70.
    发明授权
    Uplink MIMO design 有权

    公开(公告)号：US10454542B2

    公开(公告)日：2019-10-22

    申请号：US15660325

    申请日：2017-07-26

    申请人： QUALCOMM Incorporated

    发明人： Renqiu Wang ,  Wei Zeng ,  Xiaoxia Zhang ,  Hao Xu

    IPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04B7/0452 ,  H04L27/26 ,  H04W88/02 ,  H04B7/06

    摘要： Aspects of the disclosure relate to multiple-input multiple-output (MIMO) signals, and the determination of a precoding matrix for configuring the MIMO signals. An uplink traffic channel may be configured utilizing orthogonal frequency division multiplexing (OFDM) waveform. Determination of the precoding matrix may be based at least in part on an estimate of the uplink carrier, where the uplink carrier estimate is based at least in part on a downlink reference signal, exploiting channel reciprocity in a time division duplex (TDD) carrier. Determination of the precoding matrix may further be based at least in part on a cross-correlation matrix Rnn or a whitening matrix determined by a scheduling entity. Other aspects, embodiments, and features are also claimed and described.