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    Frequency-independent spatial processing for wideband miso and mimo systems
    1.
    发明专利
    Frequency-independent spatial processing for wideband miso and mimo systems 有权
    用于宽带MISO和MIMO系统的频率独立空间处理

    公开(公告)号：JP2012199933A

    公开(公告)日：2012-10-18

    申请号：JP2012104813

    申请日：2012-05-01

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： WALTON RODNEY J ,  KETCHUM JOHN W ,  WALLACE MARK S ,  HOWARD STEVEN J

    IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L1/00 ,  H04L25/02 ,  H04L27/26

    CPC classification number: H04L1/0002 ,  H04B7/0417 ,  H04B7/0617 ,  H04L25/0206 ,  H04L25/0212 ,  H04L25/0242 ,  H04L27/2647

    Abstract: PROBLEM TO BE SOLVED: To provide frequency-independent eigensteering in MISO and MIMO systems.SOLUTION: A correlation matrix is computed for a MIMO channel based on channel response matrices and decomposed to obtain NS frequency-independent steering vectors for NS spatial channels of the MIMO channel. For main path eigensteering, a data symbol stream is transmitted on the best spatial channel for the main propagation path of the MIMO channel. For receiver eigensteering, a data symbol stream is steered toward a receive antenna based on a steering vector obtained for that receive antenna. For all eigensteering schemes, a matched filter is derived for each receive antenna based on the steering vector(s) and channel response vectors for the receive antenna.

    Abstract translation: 要解决的问题：在MISO和MIMO系统中提供频率独立的本征导引。 解决方案：基于信道响应矩阵为MIMO信道计算相关矩阵，并分解以获得用于MIMO信道的NS空间信道的NS频率无关导向向量。 对于主路径特征导向，在MIMO信道的主传播路径的最佳空间信道上发送数据符号流。 对于接收机本征导向，基于为该接收天线获得的导向向量，将数据符号流转向接收天线。 对于所有特征导向方案，基于接收天线的导向矢量和信道响应向量，为每个接收天线导出匹配滤波器。 版权所有（C）2013，JPO＆INPIT

    Transmission diversity and spatial spreading for ofdm-based multi-antenna communication system
    4.
    发明专利
    Transmission diversity and spatial spreading for ofdm-based multi-antenna communication system 有权
    基于OFDM的多天线通信系统的传输多样性和空间扩展

    公开(公告)号：JP2010200342A

    公开(公告)日：2010-09-09

    申请号：JP2010087967

    申请日：2010-04-06

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： WALTON JAY RODNEY ,  KETCHUM JOHN W ,  WALLACE MARK S ,  HOWARD STEVEN J ,  NANDA SANJIV

    IPC: H04J11/00 ,  H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04L27/26

    CPC classification number: H04B7/0615 ,  H04B7/0413 ,  H04L27/2602

    Abstract: PROBLEM TO BE SOLVED: To achieve transmission diversity on a legacy single-antenna receiving device. SOLUTION: In order to obtain transmission diversity, a transmission entity uses different pseudo-random steering vectors across subbands, and uses the same steering vector across packets for each subband. A receiving entity does not need to know the pseudo-random steering vectors and further does not need to perform any space processing. For space spreading, the transmission entity uses different pseudo-random steering vectors across the subbands and uses different steering vectors across the packets for each subband. Only the transmission and the receiving entities know the steering vectors used for data transmission. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：实现传统单天线接收设备的传输分集。 解决方案：为了获得传输分集，传输实体在子带之间使用不同的伪随机导引向量，并且对于每个子带使用相同的导向向量跨包。 接收实体不需要知道伪随机导引向量，并且不需要执行任何空间处理。 对于空间扩展，传输实体在子带上使用不同的伪随机导引向量，并且对于每个子带使用不同的导向向量跨越分组。 只有传输和接收实体知道用于数据传输的导向向量。 版权所有（C）2010，JPO＆INPIT

    Transmission in multi-channel communication system using selective channel power control
    5.
    发明专利
    Transmission in multi-channel communication system using selective channel power control 有权
    使用选择通道功率控制的多通道通信系统中的传输

    公开(公告)号：JP2009081873A

    公开(公告)日：2009-04-16

    申请号：JP2008291137

    申请日：2008-11-13

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： KETCHUM JOHN W ,  HOWARD STEVEN J ,  WALTON JAY ROD ,  WALLACE MARK S ,  LING FUYUN

    IPC: H04J11/00 ,  H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/26 ,  H04L1/00 ,  H04L1/06 ,  H04L5/06 ,  H04L25/03 ,  H04L27/26

    CPC classification number: H04W52/346 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/06 ,  H04L25/03343 ,  H04L2001/0096 ,  H04W52/24 ,  H04W52/42

    Abstract: PROBLEM TO BE SOLVED: To provide an effective coding and modulation scheme capable of processing data before transmission on a channel. SOLUTION: Data are coded on the basis of a common coding and modulation scheme to provide modulation symbols and the modulation symbols for each selected channel are pre-weighted on the basis of channel's characteristics. The pre-weighting may be achieved by "inverting" the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs at or above a particular threshold are selected, "bad" channels are not used, and the total available transmit power is distributed across only "good" channels. Improved performance is achieved due to the combined benefits of using only the Ns best channels and matching the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme. COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题：提供能够在通道上传输之前处理数据的有效的编码和调制方案。 解决方案：基于通用编码和调制方案对数据进行编码以提供调制符号，并且基于信道的特性对每个选定信道的调制符号进行预加权。 预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。 通过选择性信道反转，仅选择具有等于或高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。 由于仅使用Ns最佳信道并且将每个所选信道的接收SNR与所选择的编码和调制方案所需的SNR相匹配的综合益处，实现了改进的性能。 版权所有（C）2009，JPO＆INPIT

    Single-burst acquisition for wireless communication
    6.
    发明专利
    Single-burst acquisition for wireless communication 有权
    无线通信的单次收购

    公开(公告)号：JP2012199940A

    公开(公告)日：2012-10-18

    申请号：JP2012106857

    申请日：2012-05-08

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： WALLACE MARK S ,  KETCHUM JOHN W ,  WALTON JAY RODNEY ,  HOWARD STEVEN J

    IPC: H04J11/00 ,  H04B7/04 ,  H04W56/00

    CPC classification number: H04W52/42 ,  H04L27/2613 ,  H04L27/2659 ,  H04L27/266 ,  H04W52/286

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for performing acquisition of packets.SOLUTION: First detection values are determined based on a first plurality of samples, e.g., by performing delay-multiply-integrate on the samples. Power values are determined based on the first plurality of samples, e.g., by performing multiply-integrate on the samples. The first detection values are averaged to obtain average detection values. The power values are also averaged to obtain average power values. Whether a packet is present is determined based on the average detection values and the average power values. Second detection values are determined based on a second plurality of samples. The start of the packet is determined based on the first and second detection values. A third detection value is determined based on a third plurality of samples. A frequency error of the packet is estimated based on the first and third detection values.

    Abstract translation: 要解决的问题：提供执行数据包采集的技术。 解决方案：基于第一多个采样来确定第一检测值，例如通过对样本执行延迟乘法积分。 功率值基于第一多个采样来确定，例如通过对采样进行乘法整合。 将第一检测值平均以获得平均检测值。 功率值也被平均以获得平均功率值。 基于平均检测值和平均功率值确定分组是否存在。 基于第二多个样本确定第二检测值。 基于第一和第二检测值确定分组的开始。 基于第三多个采样来确定第三检测值。 基于第一和第三检测值来估计分组的频率误差。 版权所有（C）2013，JPO＆INPIT

    Phase correction for ofdm and mimo transmissions
    7.
    发明专利
    Phase correction for ofdm and mimo transmissions 有权
    OFDM和MIMO传输的相位校正

    公开(公告)号：JP2012182801A

    公开(公告)日：2012-09-20

    申请号：JP2012090199

    申请日：2012-04-11

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： J RODNEY WALTON ,  WALLACE MARK S ,  MEDVEDEV IRINA ,  HOWARD STEVEN J

    IPC: H04J11/00 ,  H04B7/04 ,  H04J99/00

    CPC classification number: H04L27/0014 ,  H04L1/0045 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/061 ,  H04L27/261 ,  H04L27/2657 ,  H04L27/2662 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04L2027/0087

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for performing phase correction for wireless communication.SOLUTION: Received pilot symbols and received data symbols are obtained from an orthogonal frequency division multiplexing (OFDM) and/or multiple-input multiple-output (MIMO) transmission. First phase information is obtained based upon the received pilot symbols. Second phase information is obtained based upon the received data symbols. The phase of the received data symbols is corrected based upon the first and second phase information (directly and/or indirectly). For example, the phase of the received data symbols may be corrected based upon the first phase information, detection may be performed on the phase corrected data symbols to obtain estimated data symbols, the second phase information may be obtained based upon the estimated data symbols, and the phase of the estimated data symbols may be corrected based upon the second phase information. The phase correction may also be performed in various manners.

    Abstract translation: 要解决的问题：提供用于进行无线通信的相位校正的技术。 解决方案：从正交频分复用（OFDM）和/或多输入多输出（MIMO）传输获得接收到的导频符号和接收的数据符号。 基于接收到的导频符号获得第一相位信息。 基于接收到的数据符号获得第二相位信息。 基于第一和第二相位信息（直接和/或间接地）校正接收到的数据符号的相位。 例如，可以基于第一相位信息来校正接收到的数据符号的相位，可以对相位校正数据符号执行检测以获得估计的数据符号，可以基于估计的数据符号获得第二相位信息， 并且可以基于第二相位信息来校正估计数据符号的相位。 相位校正也可以以各种方式进行。 版权所有（C）2012，JPO＆INPIT

    Efficient filter weight computation for mimo system
    9.
    发明专利
    Efficient filter weight computation for mimo system 有权
    MIMO系统的有效滤波器重量计算

    公开(公告)号：JP2011151812A

    公开(公告)日：2011-08-04

    申请号：JP2011025957

    申请日：2011-02-09

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： HOWARD STEVEN J ,  KETCHUM JOHN W ,  WALLACE MARK S ,  MONSEN PETER ,  WALTON JAY RODNEY

    IPC: H04J99/00 ,  H04B7/04

    CPC classification number: H04B7/0854 ,  H04B7/0413 ,  H04L25/0246 ,  H04L25/0248 ,  H04L2025/03426 ,  H04L2025/03605 ,  H04L2025/03611

    Abstract: PROBLEM TO BE SOLVED: To provide a technique for efficiently deriving a spatial filter matrix. SOLUTION: In a first scheme, a Hermitian matrix is iteratively derived, based on a channel response matrix, and a matrix inversion is calculated indirectly by iteratively deriving the Hermitian matrix. The spatial filter matrix is derived, based on the Hermitian matrix and the channel response matrix. In a second scheme, multiple rotations are performed to iteratively obtain first and second matrices for a pseudo-inverse matrix of the channel response matrix. The spatial filter matrix is derived based on the first and second matrices. In a third scheme, a matrix is formed based on the channel response matrix and decomposed to obtain a unitary matrix and a diagonal matrix. The spatial filter matrix is derived, based on the unitary matrix, the diagonal matrix and the channel response matrix. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种用于有效地导出空间滤波器矩阵的技术。 解决方案：在第一种方案中，基于信道响应矩阵迭代地导出Hermitian矩阵，并且通过迭代地导出Hermitian矩阵来间接计算矩阵求逆。 基于Hermitian矩阵和信道响应矩阵导出空间滤波矩阵。 在第二方案中，执行多次旋转以迭代地获得用于信道响应矩阵的伪逆矩阵的第一和第二矩阵。 基于第一和第二矩阵导出空间滤波器矩阵。 在第三方案中，基于信道响应矩阵形成矩阵并分解以获得酉矩阵和对角矩阵。 基于单一矩阵，对角矩阵和信道响应矩阵导出空间滤波器矩阵。 版权所有（C）2011，JPO＆INPIT

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