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    LOW-COMPLEXITY PRECODER DESIGN FOR LARGE-SCALE MIMO COMMUNICATION SYSTEMS
    1.
    发明申请
    LOW-COMPLEXITY PRECODER DESIGN FOR LARGE-SCALE MIMO COMMUNICATION SYSTEMS 有权
    用于大规模MIMO通信系统的低复杂度预编码器设计

    公开(公告)号：US20150063254A1

    公开(公告)日：2015-03-05

    申请号：US14465053

    申请日：2014-08-21

    申请人： NEC Laboratories America, Inc.

    发明人： Guosen Yue ,  Narayan Prasad ,  Sampath Rangarajan ,  Samet Oymak

    IPC分类号： H04B7/04 ,  H04L5/00 ,  H04W72/04

    CPC分类号： H04B7/0465 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/0452 ,  H04B7/0469 ,  H04B7/0617 ,  H04L5/0037 ,  H04W52/367 ,  H04W52/42

    摘要： A method and system are provided. The method includes providing transmit precoders for a multiple-input and multiple-output communication system having a plurality of transmit antennas. The plurality of transmit antennas are for forming, using precoding, a plurality of channels such that each of the plurality of channels are configurable to serve a respective one of a plurality of users. The providing step includes imposing a respective average transmit antenna power constraint on each of the plurality of transmit antennas. The providing step further includes determining a diagonal precoder responsive to applying column scaling to a downlink channel matrix having a plurality of rows and a plurality of columns. The providing step additionally includes generating, from the diagonal precoder, a weighted precoder in accordance with the respective average antenna power constraint by optimizing a weighted sum-rate obtained upon transmitting respective signals over the plurality of channels.

    摘要翻译： 提供了一种方法和系统。 该方法包括为具有多个发射天线的多输入和多输出通信系统提供发射预编码器。 多个发射天线用于使用预编码形成多个信道，使得多个信道中的每一个可配置为服务于多个用户中的相应一个。 提供步骤包括在多个发射天线中的每一个上施加相应的平均发射天线功率约束。 所述提供步骤还包括：响应于对具有多个行和多个列的下行链路信道矩阵应用列缩放来确定对角预编码器。 提供步骤还包括从对角线预编码器根据相应的平均天线功率约束，通过优化通过多个信道发送各个信号而获得的加权和频率来生成加权预编码器。

    Apparatus, system and method for providing a multiple input/multiple output (MIMO) channel interface
    4.
    发明授权
    Apparatus, system and method for providing a multiple input/multiple output (MIMO) channel interface 有权
    用于提供多输入/多输出（MIMO）信道接口的装置，系统和方法

    公开(公告)号：US08331425B2

    公开(公告)日：2012-12-11

    申请号：US11363766

    申请日：2006-02-28

    申请人： Julien Nicolas ,  Amit Kalhan

    发明人： Julien Nicolas ,  Amit Kalhan

    IPC分类号： H04B1/38

    CPC分类号： H04B7/022 ,  H04B7/026 ,  H04B7/0413 ,  H04B7/0439

    摘要： A system, method and apparatus, provide for the utilization of the MIMO technique with single-antenna communication devices that maximize high-speed broadband communication. The apparatus includes a wireless communication interface (WCI) device configured to exchange wireless signals with a base station through a multiple input multiple output (MIMO) air interface and to exchange a corresponding set of wireless signals with an access terminal through a wideband air interface having a greater bandwidth than the bandwidth of the MIMO air interface. The system includes a plurality of WCI devices communicating with the base station and exchanging corresponding signals with the access terminal.

    摘要翻译： 一种系统，方法和装置，用于将MIMO技术与单天线通信设备相结合，从而实现高速宽带通信的最大化。 该装置包括被配置为通过多输入多输出（MIMO）空中接口与基站交换无线信号的无线通信接口（WCI）装置，并且通过宽带空中接口与接入终端交换相应的一组无线信号，所述宽带空中接口具有 比MIMO空中接口的带宽更大的带宽。 该系统包括与基站通信并与接入终端交换相应信号的多个WCI设备。

    Antenna Selection For Mimo Decoding
    5.
    发明申请
    Antenna Selection For Mimo Decoding 有权
    天线选择用于Mimo解码

    公开(公告)号：US20120294383A1

    公开(公告)日：2012-11-22

    申请号：US13564305

    申请日：2012-08-01

    申请人： Eddy Hum ,  Ming Jia

    发明人： Eddy Hum ,  Ming Jia

    IPC分类号： H04B7/08

    CPC分类号： H04B7/0456 ,  H04B7/0439

    摘要： A MIMO decoder is configured to obtain a channel matrix and generate a Hermitian transpose of the channel matrix. A product of the Hermitian transpose of the channel matrix and the channel matrix is generated to provide a first product having multiple diagonal elements. A partial matrix inversion of the diagonal elements of the first product is generated to provide a diagonal vector. From the diagonal vector, an antenna layer is selected from the multiple antenna layers and represents the antenna layer selected for a given processing iteration. The selected antenna layer will preferably correspond to that having the lowest inverse channel gain. A partial matrix inversion of the first product along the row corresponding to the selected antenna layer is generated to provide a row vector. A product of the row vector and the Hermitian transpose of the channel matrix is generated to provide an inverse channel gain vector.

    摘要翻译： MIMO解码器被配置为获得信道矩阵并且生成信道矩阵的厄米转置。 产生Hermitian转置通道矩阵和通道矩阵的乘积，以提供具有多个对角元素的第一乘积。 产生第一乘积的对角元素的部分矩阵反演以提供对角矢量。 从对角向量中，从多个天线层中选择天线层，并表示为给定的处理迭代而选择的天线层。 所选择的天线层将优选地对应于具有最低反向信道增益的天线层。 产生沿着对应于所选天线层的行的第一乘积的部分矩阵求逆以提供行向量。 产生行向量和信道矩阵的Hermitian转置的乘积以提供反向信道增益向量。

    Antenna selection for MIMO decoding
    6.
    发明授权
    Antenna selection for MIMO decoding 有权
    MIMO解码天线选择

    公开(公告)号：US08265212B2

    公开(公告)日：2012-09-11

    申请号：US11948644

    申请日：2007-11-30

    申请人： Eddy Hum ,  Ming Jia

    发明人： Eddy Hum ,  Ming Jia

    IPC分类号： H04B7/10 ,  H04L1/02

    CPC分类号： H04B7/0456 ,  H04B7/0439

    摘要： A MIMO decoder is configured to obtain a channel matrix and generate a Hermitian transpose of the channel matrix. A product of the Hermitian transpose of the channel matrix and the channel matrix is generated to provide a first product having multiple diagonal elements. A partial matrix inversion of the diagonal elements of the first product is generated to provide a diagonal vector. From the diagonal vector, an antenna layer is selected from the multiple antenna layers and represents the antenna layer selected for a given processing iteration. The selected antenna layer will preferably correspond to that having the lowest inverse channel gain. A partial matrix inversion of the first product along the row corresponding to the selected antenna layer is generated to provide a row vector. A product of the row vector and the Hermitian transpose of the channel matrix is generated to provide an inverse channel gain vector.

    摘要翻译： MIMO解码器被配置为获得信道矩阵并且生成信道矩阵的厄米转置。 产生Hermitian转置通道矩阵和通道矩阵的乘积，以提供具有多个对角元素的第一乘积。 产生第一乘积的对角元素的部分矩阵反演以提供对角矢量。 从对角向量中，从多个天线层中选择天线层，并表示为给定的处理迭代而选择的天线层。 所选择的天线层将优选地对应于具有最低反向信道增益的天线层。 产生沿着对应于所选天线层的行的第一乘积的部分矩阵求逆以提供行向量。 产生行向量和信道矩阵的Hermitian转置的乘积以提供反向信道增益向量。

    Precoder and precoding method in a multi-antenna system
    7.
    发明授权
    Precoder and precoding method in a multi-antenna system 有权
    多天线系统中的预编码和预编码方法

    公开(公告)号：US08204142B2

    公开(公告)日：2012-06-19

    申请号：US12021488

    申请日：2008-01-29

    申请人： In-Soo Hwang ,  Jong-Hyung Kwun ,  Sei-Joon Shim ,  Chan-Byoung Chae ,  Robert Heath, Jr.

    发明人： In-Soo Hwang ,  Jong-Hyung Kwun ,  Sei-Joon Shim ,  Chan-Byoung Chae ,  Robert Heath, Jr.

    IPC分类号： H04B7/02

    CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0439 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0639

    摘要： A precoder and a precoding method in a multiuser multi-antenna system are provided. The precoder includes a channel checker for determining a DownLink (DL) channel condition of terminals in a service coverage area, a pre-compensator for pre-compensating, for channel distortion, signals to be sent to the terminals when a nonlinear algorithm is selected based on the channel condition of the terminals, and an interference remover for canceling interference in a channel by multiplying the pre-compensated signals by inverse channels of the terminals, and for canceling interference between the terminals. Accordingly, the pre-equalization can be carried out without global channel state information, and an increase of the transmit power can be prevented in the permutation.

    摘要翻译： 提供了一种多用户多天线系统中的预编码器和预编码方法。 预编码器包括用于确定服务覆盖区域中的终端的下行链路（DL）信道状态的信道检查器，用于预补偿的预补偿器，用于信道失真，当基于非线性算法被选择时要发送到终端的信号 在终端的信道条件下，以及干扰去除器，用于通过将预补偿信号乘以终端的反向信道来消除信道中的干扰，并用于消除终端之间的干扰。 因此，可以在没有全局信道状态信息的情况下执行预均衡，并且可以在排列中防止发送功率的增加。

    RESOURCE ALLOCATION METHOD FOR MIMO-OFDM OF MULTI-USER ACCESS SYSTEMS
    8.
    发明申请
    RESOURCE ALLOCATION METHOD FOR MIMO-OFDM OF MULTI-USER ACCESS SYSTEMS 有权
    多用户访问系统的MIMO-OFDM资源分配方法

    公开(公告)号：US20080165883A1

    公开(公告)日：2008-07-10

    申请号：US12050623

    申请日：2008-03-18

    申请人： Peigang JIANG ,  Mattias WENNSTROM

    发明人： Peigang JIANG ,  Mattias WENNSTROM

    IPC分类号： H04L1/02

    CPC分类号： H04B7/0413 ,  H04B7/0439 ,  H04L5/023 ,  H04L27/2608

    摘要： A resource allocation method for MIMO (multi-input multi-output-OFDM (orthogonal frequency-division multiplex) of multi-user access systems includes A) for each sub-carrier or group of sub-carriers of OFDM, grouping signature vectors of users at a time period according to correlations of the signature vectors; B) from the grouping results, selecting the signature vectors according to a scheduling rule; assigning the sub-carrier frequency and time resource to users of which simultaneously the selected signature vectors have low correlations; and assigning spatial resource to the users corresponding to the selected signature vectors. By minimizing the spatial co-channel interference to an acceptable low level, the complexity significantly in the joint multi-user optimization is reduced.

    摘要翻译： 用于多用户接入系统的MIMO（多输入多输出OFDM（正交频分复用））的资源分配方法包括：A）针对OFDM的每个子载波或子载波组，分组用户的签名矢量 在根据签名向量的相关性的时间段; B）从分组结果中，根据调度规则选择签名向量; 将副载波频率和时间资源分配给同时选择的签名矢量具有低相关性的用户; 以及向对应于所选择的签名矢量的用户分配空间资源。 通过将空间同信道干扰最小化到可接受的低电平，联合多用户优化中的复杂度显着降低。

    SOFT DEMAPPING FOR MIMO DECODING
    9.
    发明申请
    SOFT DEMAPPING FOR MIMO DECODING 有权
    用于MIMO解码的软解码

    公开(公告)号：US20080130775A1

    公开(公告)日：2008-06-05

    申请号：US11948675

    申请日：2007-11-30

    申请人： Eddy Hum ,  Ming Jia

    发明人： Eddy Hum ,  Ming Jia

    IPC分类号： H04L5/12

    CPC分类号： H04B7/0456 ,  H04B7/0439

    摘要： A look-up table having distance information corresponding to a distance between a potential candidate symbol and a most proximate competing symbol for each bit of a plurality of potential candidate symbols is provided for a given modulation type. A MIMO decoder will obtain multiple candidate symbols that are provided in a maximum likelihood solution and that correspond to each of the antenna layers of a MIMO wireless communication system. A first candidate symbol is selected from the plurality of candidate symbols, wherein the first candidate symbol corresponds to a first potential candidate symbol of the candidate symbols provided in the look-up table. Distance information is obtained from the look-up table for each bit of the first potential candidate symbol. Likelihood indicium is determined for each bit of the first candidate symbol as a function of the distance information that was obtained for each bit.

    摘要翻译： 对于给定的调制类型，提供了具有与多个潜在候选符号的每个位的潜在候选符号和最接近的竞争符号之间的距离相对应的距离信息的查找表。 MIMO解码器将获得在最大似然解中提供并且对应于MIMO无线通信系统的每个天线层的多个候选符号。 从多个候选符号中选择第一候选符号，其中第一候选符号对应于在查找表中提供的候选符号的第一潜在候选符号。 从第一潜在候选符号的每个比特的查找表中获得距离信息。 根据为每个位获得的距离信息的函数确定第一候选符号的每个位的似然度戳。