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    Reduced complexity beam-steered MIMO OFDM system
    12.
    发明授权
    Reduced complexity beam-steered MIMO OFDM system 有权
    降低复杂度的波束控制MIMO OFDM系统

    公开(公告)号：US08824583B2

    公开(公告)日：2014-09-02

    申请号：US13793520

    申请日：2013-03-11

    Applicant: QUALCOMM Incorporated

    Inventor： Steven J. Howard ,  John W. Ketchum ,  Mark S. Wallace ,  Jay Rodney Walton

    IPC: H04L27/28 ,  H04B7/06 ,  H04L25/02 ,  H04B7/04 ,  H04L25/03 ,  H04L5/00

    CPC classification number: H04B7/0421 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/066 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

    Abstract: Techniques for transmitting data using channel information for a subset of all subcarriers used for data transmission are described. A transmitter station receives channel information for at least one subcarrier that is a subset of multiple subcarriers used for data transmission. The channel information may include at least one transmit steering matrix, at least one set of eigenvectors, at least one channel response matrix, at least one channel covariance matrix, an unsteered pilot, or a steered pilot for the at least one subcarrier. The transmitter station obtains at least one transmit steering matrix for the at least one subcarrier from the channel information and determines a transmit steering matrix for each of the multiple subcarriers. The transmitter station performs transmit steering or beam-steering for each of the multiple subcarriers with the transmit steering matrix for that subcarrier.

    Abstract translation: 描述了使用用于数据传输的所有子载波的子集的信道信息来发送数据的技术。 发射机站接收作为用于数据传输的多个子载波的子集的至少一个子载波的信道信息。 信道信息可以包括至少一个发射导向矩阵，至少一组特征向量，至少一个信道响应矩阵，至少一个信道协方差矩阵，非导向导频或用于所述至少一个子载波的导频导频。 发射机站从信道信息中获取至少一个子载波的至少一个发射导向矩阵，并确定多个子载波中的每一个的发射导向矩阵。 发射台使用该子载波的发射导向矩阵对多个子载波中的每一个进行发射导向或波束导向。

    Spatial spreading in a multi-antenna communication system
    13.
    发明授权
    Spatial spreading in a multi-antenna communication system 有权

    公开(公告)号：US11171693B2

    公开(公告)日：2021-11-09

    申请号：US16666149

    申请日：2019-10-28

    Applicant: QUALCOMM Incorporated

    Inventor： Jay Rodney Walton ,  Lizhong Zheng ,  John W. Ketchum ,  Mark S. Wallace ,  Steven J. Howard

    IPC: H04L1/02 ,  H04B7/08 ,  H04B7/0417 ,  H04B7/06 ,  H04L1/06 ,  H04B17/336 ,  H04B7/0456

    Abstract: Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans, where ND≥1 and NM>1. The ND blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.

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