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    MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS WITH MULTIPLE TRANSMISSION MODES
    31.
    发明申请
    MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS WITH MULTIPLE TRANSMISSION MODES 有权
    具有多种传输模式的多输入多输出（MIMO）系统

    公开(公告)号：US20100166100A1

    公开(公告)日：2010-07-01

    申请号：US12721697

    申请日：2010-03-11

    申请人： Irina Medvedev ,  Jay Rod Walton ,  Mark Wallace

    发明人： Irina Medvedev ,  Jay Rod Walton ,  Mark Wallace

    IPC分类号： H04B7/02 ,  H04L27/00 ,  H04L25/03

    CPC分类号： H04B7/0417 ,  H04B7/043 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/0689 ,  H04B7/0691 ,  H04B7/0854 ,  H04L1/0002 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0046 ,  H04L5/006 ,  H04W52/42

    摘要： Techniques to transmit data on a number of transmission channels in a multi-channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These schemes may include a partial-CSI transmission scheme that transmits a single data stream on each transmit antenna selected for use and a “beam-forming” transmission scheme that allocates all transmit power to a single transmission channel having the best performance. Each transmission scheme may provide good or near-optimum performance for a specific range of operating conditions (or operating SNRs). These multiple transmission schemes may then be combined in a piece-wise fashion to form a “multi-mode” transmission scheme that covers the full range of operating conditions supported by the MIMO system. The specific transmission scheme to be used for data transmission at any given moment would then be dependent on the specific operating condition experienced by the system at that moment.

    摘要翻译： 使用需要较少信道状态信息（CSI）的多个传输方案在多信道通信系统中在多个传输信道上传输数据的技术。 这些方案可以包括在被选择使用的每个发射天线上发送单个数据流的部分CSI传输方案以及将所有发射功率分配给具有最佳性能的单个传输信道的“波束形成”传输方案。 每个传输方案可以为特定范围的操作条件（或操作SNR）提供良好或接近最佳的性能。 然后，这些多个传输方案可以以分段方式组合以形成覆盖由MIMO系统支持的全部操作条件的“多模式”传输方案。 在任何给定时刻用于数据传输的具体传输方案将取决于系统在此刻经历的特定操作条件。

    SIGNAL PROCESSING WITH CHANNEL EIGENMODE DECOMPOSITION AND CHANNEL INVERSION FOR MIMO SYSTEMS
    32.
    发明申请
    SIGNAL PROCESSING WITH CHANNEL EIGENMODE DECOMPOSITION AND CHANNEL INVERSION FOR MIMO SYSTEMS 审中-公开
    信道处理与MIMO系统的信道分解和信道反演

    公开(公告)号：US20100046666A1

    公开(公告)日：2010-02-25

    申请号：US12609096

    申请日：2009-10-30

    申请人： John W. Ketchum ,  Jay R. Walton

    发明人： John W. Ketchum ,  Jay R. Walton

    IPC分类号： H04L27/00

    CPC分类号： H04B7/0417 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/0626 ,  H04L1/0618 ,  H04L25/0202 ,  H04L25/03343 ,  H04L25/03834

    摘要： Techniques for processing a data transmission at a transmitter and receiver, which use channel eigen-decomposition, channel inversion, and (optionally) “water-pouring”. At the transmitter, (1) channel eigen-decomposition is performed to determine eigenmodes of a MIMO channel and to derive a first set of steering vectors, (2) channel inversion is performed to derive weights (e.g., one set for each eigenmode) used to minimize ISI distortion, and (3) water-pouring may be 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 prior to transmission. At the 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.

    摘要翻译： 用于处理在发射机和接收机处的数据传输的技术，其使用信道特征分解，信道反转和（可选地）“浇注”。 在发射机处，（1）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，（2）执行信道反转以导出所使用的权重（例如，针对每个本征模式的一组） 以最小化ISI失真，以及（3）可以执行注水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，其用于在传输之前对调制符号进行预处理。 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符号的脉冲整形矩阵，使得正交符号流被恢复。

    Multiple-input, multiple-output (MIMO) systems with multiple transmission modes
    34.
    发明申请
    Multiple-input, multiple-output (MIMO) systems with multiple transmission modes 有权
    具有多种传输模式的多输入多输出（MIMO）系统

    公开(公告)号：US20050094598A1

    公开(公告)日：2005-05-05

    申请号：US10985400

    申请日：2004-11-10

    申请人： Irina Medvedev ,  Jay Walton ,  Mark Wallace

    发明人： Irina Medvedev ,  Jay Walton ,  Mark Wallace

    IPC分类号： H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04L27/26 ,  H04Q7/00

    CPC分类号： H04B7/0417 ,  H04B7/043 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/0689 ,  H04B7/0691 ,  H04B7/0854 ,  H04L1/0002 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0046 ,  H04L5/006 ,  H04W52/42

    摘要： Techniques to transmit data on a number of transmission channels in a multi-channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These schemes may include a partial-CSI transmission scheme that transmits a single data stream on each transmit antenna selected for use and a “beam-forming” transmission scheme that allocates all transmit power to a single transmission channel having the best performance. Each transmission scheme may provide good or near-optimum performance for a specific range of operating conditions (or operating SNRs). These multiple transmission schemes may then be combined in a piece-wise fashion to form a “multi-mode” transmission scheme that covers the full range of operating conditions supported by the MIMO system. The specific transmission scheme to be used for data transmission at any given moment would then be dependent on the specific operating condition experienced by the system at that moment.

    摘要翻译： 使用需要较少信道状态信息（CSI）的多个传输方案在多信道通信系统中在多个传输信道上传输数据的技术。 这些方案可以包括在被选择使用的每个发射天线上发送单个数据流的部分CSI传输方案以及将所有发射功率分配给具有最佳性能的单个传输信道的“波束形成”传输方案。 每个传输方案可以为特定范围的操作条件（或操作SNR）提供良好或接近最佳的性能。 然后，这些多个传输方案可以以分段方式组合以形成覆盖由MIMO系统支持的全部操作条件的“多模式”传输方案。 在任何给定时刻用于数据传输的具体传输方案将取决于系统在此刻经历的特定操作条件。

    METHODS AND ARRANGEMENTS FOR MITIGATING INTER-CLUSTER INTERFERENCE
    36.
    发明申请
    METHODS AND ARRANGEMENTS FOR MITIGATING INTER-CLUSTER INTERFERENCE 审中-公开

    公开(公告)号：US20180115381A1

    公开(公告)日：2018-04-26

    申请号：US15561969

    申请日：2015-03-27

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Bo LINCOLN ,  George JONGREN

    IPC分类号： H04J11/00 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04W24/02

    CPC分类号： H04J11/0053 ,  H04B7/024 ,  H04B7/0439 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0617 ,  H04L5/0035 ,  H04L5/0051 ,  H04L25/021 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/03343 ,  H04L25/03898 ,  H04W24/02 ,  H04W52/08 ,  H04W52/143 ,  H04W52/243 ,  H04W52/244

    摘要： The present disclosure relates to methods and devices for mitigating inter-cluster interference in clusters where one or more network nodes are transmitting in coordination using several transceiver antennas. In particular the disclosure relates to improved precoder algorithms to be used for coordinated multipoint transmission applications. The disclosure also relates to corresponding computer programs. The disclosure proposes a method, performed in a coordination unit in a communication system, of mitigating inter-cluster interference, wherein the coordination unit is configured to coordinate transmissions in a cluster comprising one or more wireless devices and one or more network nodes, wherein the one or more network nodes are transmitting in coordination to the wireless devices in the cluster using several transceiver antennas. The method comprises receiving, for each transceiver antenna in each of the one or more network nodes, a signal comprising pre-defined sounding sequences transmitted by the one or more wireless devices of the cluster and sounding channel interference from one or more wireless devices outside the cluster. The method further comprises estimating, from the received signal, the sounding channel interference from the wireless devices outside the cluster. The method also comprises determining downlink precoder weights, for use when transmitting from the transceiver antennas of the cluster, using the estimated sounding channel interference from the one or more wireless devices outside the cluster.

    METHODS AND SYSTEMS FOR TRANSMITTING INFORMATION ACROSS A MIMO CHANNEL FROM A TRANSMITTER TO A RECEIVER
    37.
    发明申请
    METHODS AND SYSTEMS FOR TRANSMITTING INFORMATION ACROSS A MIMO CHANNEL FROM A TRANSMITTER TO A RECEIVER 审中-公开

    公开(公告)号：US20170373742A1

    公开(公告)日：2017-12-28

    申请号：US15504607

    申请日：2015-02-04

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Magnus Stig Torsten SANDELL

    IPC分类号： H04B7/06 ,  H04W52/36 ,  H04B7/04

    CPC分类号： H04B7/0626 ,  H04B7/0434 ,  H04B7/0439 ,  H04W52/367

    摘要： A method of transmitting a plurality of data streams across a MIMO channel from a transmitter to a receiver, the transmitter comprising an array of antennas, the method comprising acquiring channel state information for a plurality of subcarrier frequencies, determining a mapping that defines, for each frequency, how each data stream is to be mapped to each antenna in the array, and for each antenna in the array, adjusting the power allocated to each data stream that is to be transmitted from the antenna, so as to maximise a measure of throughput; wherein for each data stream, the power allocated to transmitting that data stream at each frequency is greater than or equal to zero, and for each frequency, the power transmitted by any one antenna does not exceed a threshold, and for each data stream, the same power is allocated to each subcarrier used for transmitting that data stream.

    Method for transmission interference cancellation for MU-MIMO
    40.
    发明授权
    Method for transmission interference cancellation for MU-MIMO 有权
    MU-MIMO传输干扰消除方法

    公开(公告)号：US08611441B2

    公开(公告)日：2013-12-17

    申请号：US12735071

    申请日：2008-08-22

    申请人： Choong Il Yeh ,  Seung Joon Lee ,  Dong Seung Kwon

    发明人： Choong Il Yeh ,  Seung Joon Lee ,  Dong Seung Kwon

    IPC分类号： H04B15/00 ,  H04L25/03 ,  H04L27/00

    CPC分类号： H04B7/0452 ,  H04B7/0434 ,  H04B7/0439 ,  Y02D70/142 ,  Y02D70/444

    摘要： The present invention relates to a transmission interference cancellation method for a multiuser MIMO system. The method includes decomposing a channel matrix to represent formulae of permutation matrixes including a first matrix and a second matrix; determining an optimal permutation matrix among a plurality of available permutation matrixes using a norm of multiplication of the second matrix and a transmitting data vector; and determining the second matrix using the determined optimal permutation matrix and calculating a transmitting precoding vector using the determined second matrix and the transmitting data vector.

    摘要翻译： 本发明涉及一种用于多用户MIMO系统的传输干扰消除方法。 该方法包括分解信道矩阵以表示包括第一矩阵和第二矩阵的置换矩阵的公式; 使用所述第二矩阵和发送数据向量的乘法范数来确定多个可用置换矩阵中的最优置换矩阵; 以及使用所确定的最优置换矩阵确定所述第二矩阵，并使用所确定的第二矩阵和所述发送数据向量来计算发送预编码向量。