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    Method and apparatus for precomputation based MIMO decoder
    2.
    发明授权
    Method and apparatus for precomputation based MIMO decoder 有权
    用于基于预计算的MIMO解码器的方法和装置

    公开(公告)号：US09362990B1

    公开(公告)日：2016-06-07

    申请号：US14740645

    申请日：2015-06-16

    申请人： MBIT WIRELESS, INC.

    发明人： Raghavendra H Bhat ,  Bhaskar Patel

    IPC分类号： H04B7/02 ,  H04B7/04 ,  H04W88/08

    CPC分类号： H04B7/0413 ,  H04B7/0669 ,  H04B7/0697 ,  H04L1/0045 ,  H04L25/03961 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/444

    摘要： Spatial Multiplexing (SM) with Multiple Input Multiple Output (MIMO) is used in many communication systems for providing high data rates. While SM-MIMO is a powerful technique for increasing the data rate and bandwidth efficiency, the decoders for SM-MIMO are highly complex. The complexity grows exponentially for optimum decoders as the number of multiplexed layers in SM-MIMO increases. Many reduced complexity suboptimal methods are used in practice that have close to optimum performance but they remain highly complex causing high power consumption which is not desirable for battery operated client terminals. Due to the parallel architecture of many of the SM-MIMO decoders, they involve computations that may eventually turn out to be redundant. A method and apparatus may include identifying and eliminating potentially redundant computations in SM-MIMO decoders based on the technique referred herein as precomputation. The removal of redundant computations enables reduced power consumption for SM-MIMO decoders.

    摘要翻译： 在多个通信系统中使用具有多输入多输出（MIMO）的空间复用（SM）来提供高数据速率。 虽然SM-MIMO是提高数据速率和带宽效率的强大技术，但SM-MIMO的解码器非常复杂。 随着SM-MIMO中多路复用层数的增加，最优解码器的复杂度呈指数增长。 许多降低的复杂度在实践中使用的次优方法在接近最佳性能的情况下被使用，但它们仍然是非常复杂的，导致高功耗，这对于电池供电的客户终端是不希望的。 由于许多SM-MIMO解码器的并行架构，它们涉及可能最终变成冗余的计算。 一种方法和装置可以包括基于本文中称为预计算的技术来识别和消除SM-MIMO解码器中潜在的冗余计算。 去除冗余计算可以降低SM-MIMO解码器的功耗。

    Low complexity technique for log-likelihood ratio computation
    4.
    发明授权
    Low complexity technique for log-likelihood ratio computation 有权
    对数似然比计算的低复杂度技术

    公开(公告)号：US09031145B1

    公开(公告)日：2015-05-12

    申请号：US14291473

    申请日：2014-05-30

    申请人： Marvell International Ltd.

    发明人： Arul Durai Murugan Palanivelu ,  Leilei Song ,  Rohit U. Nabar ,  Jungwon Lee ,  Sayandev Mukherjee ,  Hui-Ling Lou

    IPC分类号： H04L23/02 ,  H04L5/12 ,  H04B7/04

    CPC分类号： H04B7/0413 ,  H04L25/03242 ,  H04L25/03961 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/0342

    摘要： Systems and methods for detecting data in a multiple input/multiple output signal. The method includes receiving a first signal associated with a first data value and a second signal associated with a second data value. A distance value between the received second signal and each possible second data value is calculated. Coordinates for a hypothetical first signal in light of a first possible second data value are calculated, and the first coordinate value is quantized to a nearest constellation point. A distance value between the received second signal and each possible second data value is calculated using the calculated constellation points. A determination is made of a log-likelihood ratio based on the determined distance values.

    摘要翻译： 用于检测多输入/多输出信号中的数据的系统和方法。 该方法包括接收与第一数据值相关联的第一信号和与第二数据值相关联的第二信号。 计算接收到的第二信号与每个可能的第二数据值之间的距离值。 计算出根据第一可能的第二数据值的假设第一信号的坐标，并且将第一坐标值量化到最接近的星座点。 使用所计算的星座点来计算所接收的第二信号与每个可能的第二数据值之间的距离值。 基于确定的距离值来确定对数似然比。

    METHOD AND DEVICE FOR PRECODING IN WIRELESS COMMUNICATION SYSTEM
    5.
    发明申请
    METHOD AND DEVICE FOR PRECODING IN WIRELESS COMMUNICATION SYSTEM 有权
    用于在无线通信系统中预测的方法和设备

    公开(公告)号：US20130208825A1

    公开(公告)日：2013-08-15

    申请号：US13880540

    申请日：2011-09-07

    申请人： Ki Jun Kim ,  Sung Yoon Cho ,  Dong Ku Kim ,  Jin Young Jang ,  Byoung Hoon Kim ,  Hyuk Jin Chae

    发明人： Ki Jun Kim ,  Sung Yoon Cho ,  Dong Ku Kim ,  Jin Young Jang ,  Byoung Hoon Kim ,  Hyuk Jin Chae

    IPC分类号： H04B7/04

    CPC分类号： H04B7/0456 ,  H04B7/0426 ,  H04B7/0465 ,  H04L5/0023 ,  H04L25/0244 ,  H04L25/0391 ,  H04L25/03961 ,  H04L2025/03414 ,  H04L2025/03624

    摘要： Provided is a method and a device for precoding in a wireless communication system. The method for precoding comprises the following steps: generating a first precoding matrix, W1, for deciding the transmission power of one transmission antenna from a plurality of transmission antennas as the maximum power per antenna; generating a zero forcing (ZF) precoding matrix, Ti, which does not influence the transmission antenna having the power which is decided as the maximum power per antenna, based on the (i−1)th precoding matrix Wi−1 (i=2,3, . . . ); determining a constant which has the transmission power of one transmission antenna from the rest of the transmission antennas, which do not have the transmission power as the maximum power per antenna, based on the Ti; and generating the

    摘要翻译： 提供了一种用于无线通信系统中的预编码的方法和装置。 用于预编码的方法包括以下步骤：生成用于从多个发送天线中确定一个发送天线的发送功率作为每个天线的最大功率的第一预编码矩阵W1; 基于第（i-1）预编码矩阵Wi-1（i = 2）生成不影响具有被确定为每天线的最大功率的功率的发送天线的零强制（ZF）预编码矩阵Ti ，3，...）; 基于Ti，确定具有不具有作为每个天线的最大功率的发送功率的其余发送天线的一个发送天线的发送功率的常数; 并产生

    METHOD AND APPARATUS FOR CONSTRUCTING CODEBOOK, AND METHOD, APPARATUS AND SYSTEM FOR PRECODING
    6.
    发明申请
    METHOD AND APPARATUS FOR CONSTRUCTING CODEBOOK, AND METHOD, APPARATUS AND SYSTEM FOR PRECODING 有权
    用于构建代码的方法和装置，以及用于预编码的方法，装置和系统

    公开(公告)号：US20120147992A1

    公开(公告)日：2012-06-14

    申请号：US13390796

    申请日：2009-08-18

    申请人： Hongwei Yang ,  Dong Li ,  Keying Wu

    发明人： Hongwei Yang ,  Dong Li ,  Keying Wu

    IPC分类号： H04B15/00 ,  H04B1/02

    CPC分类号： H04B7/0473 ,  H04B7/0413 ,  H04L25/03898 ,  H04L25/03961

    摘要： The present invention discloses a method and apparatus for constructing a codebook. The method comprises: receiving grouping information on a plurality of transmit antennas of a base station: obtaining a channel model for a channel between a mobile terminal and the base station; and determining an optimal precoding matrix corresponding to each antenna group according to the grouping information and the channel model, so as to construct a codebook used for precoding. The present invention further discloses a method and apparatus for selecting a precoding matrix, as well as a method, apparatus and system for precoding.

    摘要翻译： 本发明公开了一种构造码本的方法和装置。 该方法包括：在基站的多个发射天线上接收分组信息：获取移动终端与基站之间的信道的信道模型; 以及根据分组信息和信道模型确定与每个天线组对应的最佳预编码矩阵，以便构​​造用于预编码的码本。 本发明还公开了一种用于选择预编码矩阵的方法和装置，以及用于预编码的方法，装置和系统。

    METHODS AND DEVICES FOR SUB-BLOCK DECODING DATA SIGNALS
    8.
    发明申请
    METHODS AND DEVICES FOR SUB-BLOCK DECODING DATA SIGNALS 审中-公开

    公开(公告)号：US20180175971A1

    公开(公告)日：2018-06-21

    申请号：US15836162

    申请日：2017-12-08

    申请人： INSTITUT MINES-TELECOM

    发明人： Asma MEJRI ,  Ghaya REKAYA BEN-OTHMAN ,  Mohammed-Achraf KHSIBA

    IPC分类号： H04L1/06 ,  H04B7/0413 ,  H04W4/00

    CPC分类号： H04L1/0643 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0891 ,  H04L1/0668 ,  H04L25/03191 ,  H04L25/03961 ,  H04W4/70 ,  H04W84/045

    摘要： Embodiments of the invention provide a decoder for decoding a signal received through a transmission channel in a communication system, said signal comprising a vector of information symbols, wherein the decoder comprises: a processing unit (307) configured to determine at least one candidate set of division parameters and to perform a division of said vector of information symbols into a set of sub-vectors in association with each candidate set of division parameters, each pair of sub-vectors being associated with a division metric; a selection unit (309) configured to select one of said candidate sets of division parameters according to a selection criterion depending on said division metric; and a decoding unit (311) configured to determine at least one estimate of each sub-vector associated with said selected set of division parameters by applying a symbol estimation algorithm, wherein the decoder is configured to determine at least one estimate of the vector of information symbols from said at least one estimate of each sub-vector of information symbols.

    Equalization with noisy channel state information
    10.
    发明授权
    Equalization with noisy channel state information 有权

    公开(公告)号：US09692622B2

    公开(公告)日：2017-06-27

    申请号：US14300658

    申请日：2014-06-10

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： Ali S. Khayrallah

    IPC分类号： H03H7/40 ,  H04L25/03 ,  H04L25/02

    CPC分类号： H04L25/03961 ,  H04L25/0242 ,  H04L25/03197

    摘要： Systems and methods related to improved coherent demodulation and, in particular, improved channel equalization that accounts for variation in an effective channel estimation error with transmitted symbols are disclosed. In one embodiment, a wireless node includes a receiver front-end, a channel estimator, and an equalizer. The receiver front-end is adapted to output samples of a received signal. The channel estimator is adapted to estimate a channel between a transmitter of the received signal and the wireless node based on the samples of the received signal. The equalizer is adapted to process the samples of the received signal according to a modified equalization scheme that compensates for variation in an effective channel estimation error with transmitted symbols to thereby provide corresponding bit or symbol decisions. In this manner, channel equalization is improved, particularly for a wireless system that utilizes a modulation scheme with varying amplitude.