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    Low-complexity, symbol-based, reduced substreams maximum likelihood decoder and method for a multiple-input, multiple-output communication system
    1.
    发明授权
    Low-complexity, symbol-based, reduced substreams maximum likelihood decoder and method for a multiple-input, multiple-output communication system 有权
    低复杂度，基于符号的减少子流最大似然解码器和多输入多输出通信系统的方法

    公开(公告)号：US07321644B2

    公开(公告)日：2008-01-22

    申请号：US10863455

    申请日：2004-06-08

    申请人： David J. Love ,  Srinath Hosur ,  Anuj Batra

    发明人： David J. Love ,  Srinath Hosur ,  Anuj Batra

    IPC分类号： H03D1/00

    CPC分类号： H04L1/005 ,  H04B7/04 ,  H04L25/0204 ,  H04L27/2601

    摘要： A greater likelihood decoder, a method of deriving a reduced substreams maximum likelihood (RSML) decoded symbol vector and a multiple-input, multiple-output (MIMO) receiver incorporating the decoder or the method. In one embodiment, the decoder includes: (1) a suboptimal decoder that analyzes a received symbol vector to generate substream indicators and a decoded symbol vector estimate, (2) weakest substreams decision logic, coupled to the suboptimal decoder, that receives the substream indicators and selects weakest ones thereof and (3) subspace search logic, coupled to the suboptimal decoder and the weakest substreams decision logic, that further selects a reduced substreams maximum likelihood (RSML) decoded symbol vector from a subspace of decoded symbol vector candidates derived from the decoded symbol vector estimate and the weakest ones.

    摘要翻译： 更大似然解码器，导出减少的子流最大似然（RSML）解码符号向量的方法和包含解码器或方法的多输入多输出（MIMO）接收机的方法。 在一个实施例中，解码器包括：（1）分析接收的符号向量以产生子流指示符和解码的符号向量估计的次优解码器，（2）耦合到次优解码器的最弱子流决策逻辑，其接收子流指示符 并选择最弱的子码流决策逻辑，以及（3）子空间搜索逻辑，该子空间搜索逻辑耦合到次优解码器和最弱子流判决逻辑，其进一步从从解码符号向量候选导出的解码符号向量候选的子空间中选择减少的子流最大似然（RSML）解码符号向量 解码符号向量估计和最弱的符号向量估计。

    Low-complexity hierarchical decoding for communications systems using multidimensional QAM signaling
    2.
    发明授权
    Low-complexity hierarchical decoding for communications systems using multidimensional QAM signaling 有权
    使用多维QAM信令的通信系统的低复杂度分层解码

    公开(公告)号：US07280622B2

    公开(公告)日：2007-10-09

    申请号：US10644545

    申请日：2003-08-20

    申请人： David J. Love ,  Srinath Hosur ,  Anuj Batra

    发明人： David J. Love ,  Srinath Hosur ,  Anuj Batra

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H04L1/0054 ,  H04L1/06

    摘要： A reduced search space minimum distance decoding method provides average probability of error performance close to optimal MAP decoding. The decoding algorithm provides dramatic complexity reductions compared with MAP decoding. A a sub-optimal decoder receives a collection of signal vectors y1 . . . yk, with k denoting a positive integer and generates an estimated transmitted multidimensional symbol {tilde over (S)}. The estimated transmitted multidimensional symbol {tilde over (S)} is decoded using hierarchical subset decoding a subset is determined therefrom. A reduced search space V is generated and minimum distance decoding is used to decode the received symbol vectors y1 . . . yk in the reduced search space V. one or more of the following: an estimated multidimensional symbol {tilde over (S)}, soft bit information, or hard bit information are cienerated therefrom.

    摘要翻译： 减少的搜索空间最小距离解码方法提供误差性能的接近于最佳MAP解码的平均概率。 与MAP解码相比，解码算法提供了显着的复杂性降低。 子优化解码器接收信号矢量y 1的集合。 。 。 其中k表示正整数，并且生成估计的传输多维符号S.使用分层子集解码对估计的传输多维符号S进行解码，从其确定子集。 生成减小的搜索空间V，并且使用最小距离解码来对接收的符号向量y 1＆lt; 1＆gt; 1进行解码。 。 。 在缩小搜索空间V中的一个或多个。以下中的一个或多个：由其估计的多维符号S，软比特信息或硬比特信息。

    Channel norm-based ordering and whitened decoding for MIMO communication systems
    3.
    发明授权
    Channel norm-based ordering and whitened decoding for MIMO communication systems 有权
    用于MIMO通信系统的基于频道规范的排序和白化解码

    公开(公告)号：US07257170B2

    公开(公告)日：2007-08-14

    申请号：US10644489

    申请日：2003-08-20

    申请人： David J. Love ,  Srinath Hosur ,  Anuj Batra ,  Tarik Muharemovic ,  Eko N. Onggosanusi

    发明人： David J. Love ,  Srinath Hosur ,  Anuj Batra ,  Tarik Muharemovic ,  Eko N. Onggosanusi

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H04L25/03012 ,  H04L2025/03414 ,  H04L2025/03605 ,  H04L2025/03611

    摘要： A channel norm-based ordering and whitened decoding technique (lower complexity iterative decoder) for MIMO communication systems performs approximately the same level of performance as an iterative minimum mean squared error decoder. Decoding a signal vector comprises receiving a signal vector yk, multiplying the received signal vector yk by a conjugate transpose of a channel matrix H*. A column vector zk is generated. The entries of the column vector zk are reordered and an estimated channel matrix {tilde over (H)} is generated. The estimated channel matrix {tilde over (H)} decomposed using a Cholesky decomposition and generating a triangular matrix L. Triangular matrix L is solved backwards and a signal vector {tilde over (s)}k estimated. An estimate of the transmitted symbol vector Ŝk is generated.

    摘要翻译： 用于MIMO通信系统的基于信道规范的排序和白化解码技术（较低复杂度迭代解码器）执行与迭代最小均方误差解码器大致相同的性能水平。 对信号矢量进行解码包括：将接收信号矢量y N k乘以通道矩阵H *的共轭转置的信号矢量y k k。 生成列向量z 。 列向量z 的条目被重新排序，并且生成估计的信道矩阵H. 估计的信道矩阵H使用Cholesky分解分解并产生三角矩阵L.三角矩阵L向后求解并且估计信号矢量s N k。 生成发送的符号矢量S N k的估计。

    Low complexity high performance decoder and method of decoding for communications systems using multidimensional signaling
    4.
    发明授权
    Low complexity high performance decoder and method of decoding for communications systems using multidimensional signaling 有权
    低复杂度的高性能解码器和使用多维信令的通信系统的解码方法

    公开(公告)号：US07248651B2

    公开(公告)日：2007-07-24

    申请号：US10644546

    申请日：2003-08-20

    申请人： David J. Love ,  Srinath Hosur ,  Anuj Batra

    发明人： David J. Love ,  Srinath Hosur ,  Anuj Batra

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H04L1/06 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/03624

    摘要： A reduced search space minimum distance decoding algorithm provides average probability of error performance close to that of optimal MAP decoding. The decoding algorithm provides dramatic complexity reductions compared with MAP decoding. A sub-optimal decoder receives signal vectors y1 . . . yk. Soft output bits are generated as is a reduced search space V via a reduced search space table creation unit in response to the soft output bits and an estimated channel H. A signal vector b is generated via a maximum likelihood decoding unit in response to the reduced search space V and the signal vectors y1 . . . yk.

    摘要翻译： 减少的搜索空间最小距离解码算法提供误差性能的平均概率接近于最佳MAP解码的概率。 与MAP解码相比，解码算法提供了显着的复杂性降低。 次优解码器接收信号矢量y 1。 。 。 y＆lt; k＆gt;。 响应于软输出比特和估计的信道H，经由减少的搜索空间表创建单元，生成软输出比特。通过减少的搜索空间表生成单元，通过最大似然解码单元响应于减少的搜索空间 搜索空间V和信号矢量y 1 <1。 。 。 y＆lt; k＆gt;。

    Method for demodulating signal and terminal and base station for executing the method
    8.
    发明授权
    Method for demodulating signal and terminal and base station for executing the method 有权
    用于解调信号的方法，终端和基站执行方法

    公开(公告)号：US08588318B2

    公开(公告)日：2013-11-19

    申请号：US12202385

    申请日：2008-09-01

    申请人： Jung Hoon Suh ,  Sung Jin Kim ,  David J. Love

    发明人： Jung Hoon Suh ,  Sung Jin Kim ,  David J. Love

    IPC分类号： H04L1/02 ,  H04B7/02

    CPC分类号： H04L27/0012

    摘要： A method of modulating and/or demodulating a signal in a communication system and a terminal for demodulating a signal received from a base station are provided. A terminal includes a singular value extractor to extract at least one singular value of a channel matrix associated with a channel that is formed between a base station and the terminal, a modulation order determination unit to determine a modulation order based on the at least one singular value, and a received signal demodulator to demodulate a received signal according to the determined modulation order.

    摘要翻译： 提供了调制和/或解调通信系统中的信号的方法和用于解调从基站接收的信号的终端的方法。 终端包括奇异值提取器，用于提取与在基站和终端之间形成的信道相关联的信道矩阵的至少一个奇异值;调制阶确定单元，用于基于至少一个奇异值确定调制阶数 值和接收信号解调器，以根据所确定的调制阶数解调接收信号。

    Apparatus and method of generating codebook for multiple input multiple output communication system
    9.
    发明授权
    Apparatus and method of generating codebook for multiple input multiple output communication system 失效
    为多输入多输出通信系统生成码本的装置和方法

    公开(公告)号：US08498356B2

    公开(公告)日：2013-07-30

    申请号：US12056340

    申请日：2008-03-27

    申请人： Bruno Clerckx ,  Yongxing Zhou ,  Sung Jin Kim ,  David J. Love ,  Il Han Kim

    发明人： Bruno Clerckx ,  Yongxing Zhou ,  Sung Jin Kim ,  David J. Love ,  Il Han Kim

    IPC分类号： H04B7/02

    CPC分类号： H04B7/0639 ,  H04B7/0417

    摘要： An apparatus and method of generating a codebook. The codebook generation apparatus includes a matrix extender to generate a candidate matrix set by multiplying a base matrix and at least one diagonal matrix, wherein the at least one diagonal matrix includes elements of a constrained set as diagonal elements; and a codebook generator to generate the codebook where a minimum distance between the elements is maximized, based on the candidate matrix set. According to aspects of the present invention, it is possible to provide a precoding codebook that can reduce an amount of feedback from a terminal.

    摘要翻译： 一种生成码本的装置和方法。 码本生成装置包括：矩阵扩展器，用于通过将基本矩阵和至少一个对角矩阵相乘来生成候选矩阵集，其中所述至少一个对角矩阵包括约束集合的元素作为对角元素; 以及码本生成器，用于基于所述候选矩阵集来生成所述元素之间的最小距离最大化的码本。 根据本发明的各方面，可以提供一种可以减少来自终端的反馈量的预编码码本。