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    Iterative detection and decoding for mimo-ofdm system
    31.
    发明专利
    Iterative detection and decoding for mimo-ofdm system 审中-公开
    MIMO-OFDM系统的迭代检测和解码

    公开(公告)号：JP2010136404A

    公开(公告)日：2010-06-17

    申请号：JP2010000271

    申请日：2010-01-04

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

    Inventor： BJERKE BJORN A ,  KETCHUM JOHN W ,  WALTON JAY R

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

    CPC classification number: H04L1/005 ,  H04B7/0413 ,  H04B7/0854 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0059 ,  H04L1/0066 ,  H04L1/0071 ,  H04L1/06 ,  H04L5/0023 ,  H04L25/03171 ,  H04L25/03305 ,  H04L25/03891 ,  H04L25/067 ,  H04L27/2647

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for iterative detection and decoding for a MIMO (Multi Input Multi Output)-OFDM (Orthogonal Frequency Division Multiplexing) system. SOLUTION: The iterative detection and decoding is performed by iteratively passing soft (multi-bit) "a priori" information between a detector and a decoder. The detector performs a detection function that is complementary to the symbol mapping and provides soft-decision symbols. "Extrinsic information" in the soft-decision symbols is then decoded to provide its extrinsic information, which comprises the a priori information used by the detector in the detection process. The detection and decoding may be iterated a number of times. The soft-decision symbols and the a priori information may be represented using log-likelihood ratios (LLRs). Techniques are provided to reduce the computational complexity associated with deriving the LLRs, including interference nulling to isolate each transmitted signal and "dual-maxima" approximation. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供MIMO（多输入多输出）-OFDM（正交频分复用）系统的迭代检测和解码技术。 解决方案：通过在检测器和解码器之间迭代地传递软（多位）“先验”信息来执行迭代检测和解码。 检测器执行与符号映射互补的检测功能，并提供软判决符号。 然后对软判决符号中的“外在信息”进行解码以提供其外在信息，其包括检测器在检测过程中使用的先验信息。 可以重复检测和解码多次。 可以使用对数似然比（LLR）来表示软判决符号和先验信息。 提供技术以减少与导出LLR相关联的计算复杂度，包括干扰归零以隔离每个发送的信号和“双最大值”近似。 版权所有（C）2010，JPO＆INPIT

    Signal processing using channel eigenmode decomposition and channel inversion for mimo system
    32.
    发明专利
    Signal processing using channel eigenmode decomposition and channel inversion for mimo system 审中-公开
    信道处理使用信道分解和信道反演进行MIMO系统

    公开(公告)号：JP2010136396A

    公开(公告)日：2010-06-17

    申请号：JP2009292682

    申请日：2009-12-24

    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 ,  WALTON JAY R

    IPC: H04J99/00 ,  H04B7/04 ,  H04L1/00 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03

    CPC classification number: H04B7/0417 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/0626 ,  H04L1/0618 ,  H04L25/0202 ,  H04L25/03343 ,  H04L25/03834

    Abstract: PROBLEM TO BE SOLVED: To provide a method of signal processing using channel eigenmode decomposition and channel inversion for MIMO systems. SOLUTION: At a transmitter, channel eigen-decomposition is performed to determine eigenmodes of a MIMO channel and to derive a first set of steering vectors, channel inversion is performed to derive weights used to minimize ISI (inter-symbol interference) distortion, and water-pouring is performed to derive scaling values indicative of the transmit powers allocated to the eigenmodes. The first set of steering vectors, weights and scaling values are used to derive a pulse-shaping matrix, which is used to precondition modulation symbols. At a receiver, channel eigen-decomposition is performed to derive a second set of steering vectors, which are used to derive a pulse-shaping matrix used to condition received symbols such that orthogonal symbol streams are recovered. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供使用MIMO系统的信道本征模式分解和信道反转的信号处理方法。 解决方案：在发射机处，执行信道特征分解以确定MIMO信道的本征模式并导出第一组导引向量，执行信道反转以导出用于最小化ISI（符号间干扰）失真的权重 ，并且执行浇注以导出指示分配给本征模式的发射功率的缩放值。 第一组导引向量，权重和缩放值用于导出脉冲整形矩阵，其用于预处理调制符号。 在接收机处，执行信道特征分解以导出第二组导引向量，其用于导出用于调整接收到的符号的脉冲整形矩阵，使得正交符号流被恢复。 版权所有（C）2010，JPO＆INPIT

    Time-domain transmit and receive processing with channel eigen-mode decomposition for mimo systems
    33.
    发明专利
    Time-domain transmit and receive processing with channel eigen-mode decomposition for mimo systems 有权
    用于MIMO系统的信道模式分解的时域发射和接收处理

    公开(公告)号：JP2010119134A

    公开(公告)日：2010-05-27

    申请号：JP2010019320

    申请日：2010-01-29

    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 ,  WALLACE MARK ,  HOWARD STEVEN J ,  WALTON JAY ROD

    IPC: H04J99/00 ,  H04B7/04 ,  H04L1/00 ,  H04L25/03 ,  H04L27/26

    CPC classification number: H04B7/0417 ,  H04B7/0443 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0029 ,  H04L25/03343 ,  H04L25/03834 ,  H04L27/2601 ,  H04L27/2647 ,  H04L2025/0349 ,  H04L2025/03605

    Abstract: PROBLEM TO BE SOLVED: To provide time-domain transmit and receive processing using channel eigen-mode decomposition for MIMO systems.
    SOLUTION: In an aspect, a time-domain implementation is provided which uses frequency-domain singular value decomposition and "water-pouring" results to derive time-domain pulse-shaping and beam-steering solutions at the transmitter and receiver. The singular value decomposition is performed at the transmitter to determine THE eigen-modes (i.e., spatial subchannels) of the MIMO channel and to derive a first set of steering vectors used to "precondition" modulation symbols. The singular value decomposition is also performed at the receiver to derive a second set of steering vectors used to precondition the received signals, such that orthogonal symbol streams are recovered at the receiver, which can simplify the receiver processing.
    COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：使用MIMO系统的信道本征模式分解来提供时域发射和接收处理。 解决方案：在一方面，提供了时域实现，其使用频域奇异值分解和“浇注”结果以在发射机和接收机处导出时域脉冲整形和波束导引解决方案。 在发射机处执行奇异值分解以确定MIMO信道的本征模式（即，空间子信道），并导出用于“调制前”调制符号的第一组导引向量。 奇异值分解也在接收机处执行以导出用于预处理接收信号的第二组导引向量，使得在接收机处恢复正交符号流，这可以简化接收机处理。 版权所有（C）2010，JPO＆INPIT

    Single-burst acquisition for wireless communication
    36.
    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：JP2012199941A

    公开(公告)日：2012-10-18

    申请号：JP2012106858

    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 ,  H04J99/00

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

    Abstract: PROBLEM TO BE SOLVED: To rapidly and accurately detect packets transmitted with different timing, frequency and transmit power, and acquire timing and frequency.SOLUTION: Based on signals from a receive antenna, using signals of electric power calculation 520 and a moving average 522 etc., a packet detector 526 determines the presence of a packet. Based on signals from delay-multiply-integrates 510 and 530, using phase calculation 534, a start-of-packet detector 536 detects the start of the packet. In addition, based on signals from delay-multiply-integrate 540, using phase calculation 544, a frequency error estimator 546 estimates a packet frequency error to be regarded as a frequency correction value. Similarly, an end-of-packet detector 556 detects the end of the packet.

    Abstract translation: 要解决的问题：快速准确地检测不同定时，频率和发射功率发送的分组，并获取定时和频率。 解决方案：基于来自接收天线的信号，使用电力计算520的信号和移动平均值522等，分组检测器526确定分组的存在。 基于来自延迟乘积分510和530的信号，使用相位计算534，分组检测器536检测分组的开始。 此外，基于来自延迟多重积分540的信号，使用相位计算544，频率误差估计器546将分组频率误差估计为频率校正值。 类似地，分组结束检测器556检测分组的结束。 版权所有（C）2013，JPO＆INPIT

    Receiver spatial processing for eigenmode transmission in mimo system
    40.
    发明专利
    Receiver spatial processing for eigenmode transmission in mimo system 有权
    MIMO系统中的接收机传输的接收空间处理

    公开(公告)号：JP2011010332A

    公开(公告)日：2011-01-13

    申请号：JP2010172439

    申请日：2010-07-30

    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 ,  WALLACE MARK S ,  WALTON J RODNEY ,  HOWARD STEVEN J

    IPC: H04J99/00 ,  H04B7/04 ,  H04B7/08 ,  H04L1/06 ,  H04L25/02 ,  H04L27/26

    CPC classification number: H04B7/0417 ,  H04B7/0854 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/06 ,  H04L25/0206 ,  H04L27/2601

    Abstract: PROBLEM TO BE SOLVED: To provide a spatial processing method for a receiver in a MIMO system.SOLUTION: In the spatial processing method, multiple received symbol streams are obtained for multiple data symbol streams transmitted through the multiple spatial channels of a MIMO channel. Spatial processing is performed in a transmitter with steering vectors, that is, estimates of transmitter steering vectors required to orthogonalize the multiple spatial channels, and spatial processing is performed on the multiple received symbol streams with a spatial filter to obtain symbol streams for multiple filters, that is, estimates of the multiple data symbol streams. Further, in the spatial processing method, response is obtained for the spatial filter based on an MMSE criterion for minimizing a mean square error between the symbol streams for the filters and the data symbol streams.

    Abstract translation: 要解决的问题：提供MIMO系统中的接收机的空间处理方法。解决方案：在空间处理方法中，通过MIMO信道的多个空间信道发送的多个数据符号流获得多个接收符号流。 在具有导向向量的发射机中执行空间处理，即，使多个空间信道正交化所需的发射机导向矢量的估计，并且对具有空间滤波器的多个接收符号流执行空间处理，以获得用于多个滤波器的符号流， 即多个数据符号流的估计。 此外，在空间处理方法中，基于用于最小化用于滤波器的符号流和数据符号流之间的均方误差的MMSE准则，获得针对空间滤波器的响应。

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