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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

    Diversity communication system for mimo ofdm communication system
    4.
    发明专利
    Diversity communication system for mimo ofdm communication system 有权
    用于MIMO OFDM通信系统的多样性通信系统

    公开(公告)号：JP2011050074A

    公开(公告)日：2011-03-10

    申请号：JP2010224047

    申请日：2010-10-01

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

    Inventor： WALTON JAY R ,  KETCHUM JOHN W

    IPC: H04J11/00 ,  H04J99/00 ,  H04B1/00 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04B7/12 ,  H04B7/26 ,  H04L1/00 ,  H04L1/06 ,  H04L27/26

    CPC classification number: H04L5/0028 ,  H04B7/04 ,  H04B7/0669 ,  H04B7/0678 ,  H04B7/0697 ,  H04L1/0001 ,  H04L1/0618 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0023

    Abstract: PROBLEM TO BE SOLVED: To provide a technique for transmitting data using a number of diversity transmission modes to improve reliability. SOLUTION: At a transmitter, for each of one or more data streams, a particular diversity transmission mode is selected for use from among a number of possible transmission modes. These transmission modes may include a frequency diversity transmission mode, a Walsh diversity transmission mode, a space time transmit diversity (STTD) transmission mode, and a Walsh-STTD transmission mode. Each diversity transmission mode redundantly transmits data over a time, a frequency, a space, or a combination thereof. Each data stream is coded and modulated to provide modulation symbols which are further processed based on the selected diversity transmission mode to provide transmit symbols. For OFDM, the transmit symbols for all data streams are further OFDM modulated to provide a stream of transmission symbols for each transmit antenna used for data transmission. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种使用多个分集传输模式发送数据以提高可靠性的技术。 解决方案：在发射机处，对于一个或多个数据流中的每一个，从多个可能的传输模式中选择使用特定分集传输模式。 这些发送模式可以包括频率分集发送模式，沃尔什分集发送模式，空时发送分集（STTD）发送模式和沃尔什STTD发送模式。 每个分集传输模式在一段时间，频率，空间或其组合中冗余地发送数据。 对每个数据流进行编码和调制，以提供调制符号，该调制符号将根据所选择的分集传输模式进一步处理以提供传输符号。 对于OFDM，所有数据流的发送符号进一步进行OFDM调制，以为用于数据传输的每个发射天线提供传输符号流。 版权所有（C）2011，JPO＆INPIT

    Transmission diversity and spatial spreading for ofdm-based multi-antenna communication system
    5.
    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

    Power control of partial channel status information (csi) multiple input multiple output (mimo) system
    6.
    发明专利
    Power control of partial channel status information (csi) multiple input multiple output (mimo) system 审中-公开
    部分信道状态信息（CSI）多输入多输出（MIMO）系统的功率控制

    公开(公告)号：JP2009239917A

    公开(公告)日：2009-10-15

    申请号：JP2009108682

    申请日：2009-04-28

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

    Inventor： MEDVEDEV IRINA ,  WALTON JAY R ,  KETCHUM JOHN W

    IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04W16/28 ,  H04W52/24

    CPC classification number: H04B7/0417 ,  H04B7/0619 ,  H04L1/0001 ,  H04L1/06 ,  H04W52/42

    Abstract: PROBLEM TO BE SOLVED: To provide a technique for controlling power to transmit a plurality of data flows in a radio multiple channel (e.g., MIMO) communication system. SOLUTION: A plurality of received symbol flows are processed according to a specific receiver processing technology (e.g., CCMI, CCMI-SC, MMSE or MMSE-SC) to first give a plurality of detected data flows. Post-detection SNRs of the detected data flows are evaluated and respective SNRs exceeding a set point is identified. This set point is correspondent to (1) an SNR required to obtain a maximum permissible spectral efficiency or (2) a target SNR required to obtain a specified spectral efficiency. A new (or adjusted) transmission power of each detected data flow related to the post-detection SNR exceeding the set point is determined and applied to the data flow. A different power control method is applied to a class of different receiver processing technique having a different characteristic. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种用于控制在无线多信道（例如，MIMO）通信系统中发送多个数据流的功率的技术。 解决方案：根据特定的接收机处理技术（例如，CCMI，CCMI-SC，MMSE或MMSE-SC）处理多个接收到的符号流，以首先给出多个检测到的数据流。 对检测到的数据流的检测后SNR进行评估，并且识别出超过设定点的各个SNR。 该设定点对应于（1）获得最大允许频谱效率所需的SNR或（2）获得特定频谱效率所需的目标SNR。 确定与超过设定点的检测后SNR相关的每个检测到的数据流的新（或调整的）发送功率并将其应用于数据流。 不同的功率控制方法被应用于具有不同特性的一类不同的接收机处理技术。 版权所有（C）2010，JPO＆INPIT

    Transmission in multi-channel communication system using selective channel power control
    8.
    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

    Method and system for providing beamforming feedback in wireless communication systems
    9.
    发明专利
    Method and system for providing beamforming feedback in wireless communication systems 有权
    在无线通信系统中提供波束形成反馈的方法和系统

    公开(公告)号：JP2012199943A

    公开(公告)日：2012-10-18

    申请号：JP2012107726

    申请日：2012-05-09

    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 ,  NANDA SANJIV ,  MEYLAN ARNAUD ,  SHRAVAN K SURINENI

    IPC: H04B7/04 ,  H04J99/00 ,  H04W16/28 ,  H04W84/12

    CPC classification number: H04B7/0643 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0634 ,  H04B7/0636 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

    Abstract: PROBLEM TO BE SOLVED: To provide techniques to support beamforming for stations in a wireless network.SOLUTION: A station supports beamforming with implicit or explicit feedback by responding to training request though sending a sounding frame, and by responding to request for explicit feedback. In one explicit beamforming embodiment, the station sends a first frame with an explicit feedback request and also sends a Null Data Packet (NDP) having at least one training field but no data field. The station receives a second frame with explicit feedback, which may be derived based on the NDP. The station derives steering information based on explicit feedback and then sends a steered frame with beamforming based on the steering information. The station performs implicit beamforming using NDP for sounding.

    Abstract translation: 要解决的问题：提供技术来支持无线网络中的站的波束成形。 解决方案：站通过响应训练请求而支持隐式或显式反馈，支持波束成形，通过发送探测帧，并响应显式反馈请求。 在一个明确的波束成形实施例中，站发送具有显式反馈请求的第一帧，并且还发送具有至少一个训练场但不包括数据字段的空数据分组（NDP）。 该站接收到具有显式反馈的第二帧，其可以基于NDP导出。 车站基于显式反馈导出转向信息，然后基于转向信息发送具有波束成形的转向帧。 该站使用NDP进行声音的隐式波束成形。 版权所有（C）2013，JPO＆INPIT

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