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162 条记录 (耗时 0.021 秒)

    Channel norm-based ordering and whitened decoding for MIMO communication systems
    41.
    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
    42.
    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;。

    Orthogonal preamble encoder, method of encoding orthogonal preambles and multiple-input, multiple-output communication system employing the same
    44.
    发明授权
    Orthogonal preamble encoder, method of encoding orthogonal preambles and multiple-input, multiple-output communication system employing the same 有权
    正交前导编码器，正交前导码的编码方法和采用该正交前​​导码的多输入多输出通信系统

    公开(公告)号：US06917311B2

    公开(公告)日：2005-07-12

    申请号：US10639418

    申请日：2003-08-11

    申请人： Srinath Hosur ,  Anuj Batra ,  Srikanth Gummadi ,  David P. Magee

    发明人： Srinath Hosur ,  Anuj Batra ,  Srikanth Gummadi ,  David P. Magee

    IPC分类号： H03M7/00 ,  H04B7/04 ,  H04L1/00 ,  H04L1/06 ,  H04L25/02 ,  H04L27/26

    CPC分类号： H04L1/0078 ,  H04B7/04 ,  H04L1/06 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0226 ,  H04L27/2613

    摘要： For use with a multiple-input, multiple-output (MIMO) transmitter, an orthogonal preamble encoder, a method of encoding orthogonal preambles and a communication system incorporating the encoder or the method. In one embodiment, the encoder includes: (1) a preamble supplement generator configured to provide a first long sequence preamble supplement to a first transmit antenna of the MIMO transmitter and (2) a preamble supplement coordinator coupled to the preamble supplement generator and configured to provide a second long sequence preamble supplement to a second transmit antenna of the MIMO transmitter, at least a portion of the second long sequence preamble supplement being a negation of the first long sequence preamble supplement.

    摘要翻译： 用于多输入多输出（MIMO）发射机，正交前导码编码器，对正交前导码进行编码的方法和结合编码器的通信系统或方法。 在一个实施例中，所述编码器包括：（1）前导码补充生成器，被配置为向所述MIMO发射机的第一发射天线提供第一长序列前导码补充，以及（2）前缀补充协调器，其耦合到所述前导码补充生成器， 向所述MIMO发射机的第二发射天线提供第二长序列前导码补充，所述第二长序列前同步码补码的至少一部分是所述第一长序列前同步码补码的否定。

    Wireless signal detection using a transformed lattice boundary
    47.
    发明授权
    Wireless signal detection using a transformed lattice boundary 有权
    使用变换的格子边界的无线信号检测

    公开(公告)号：US08346175B2

    公开(公告)日：2013-01-01

    申请号：US12022652

    申请日：2008-01-30

    申请人： David L. Milliner ,  Anuj Batra ,  Srinath Hosur

    发明人： David L. Milliner ,  Anuj Batra ,  Srinath Hosur

    IPC分类号： H04B17/00

    CPC分类号： H04L25/03242 ,  H04L1/206

    摘要： In at least some embodiments, a wireless communication system includes a transmitter that transmits a signal over a communication channel. The system also includes a receiver that receives the signal as an output of the communication channel. The receiver establishes a boundary for a transformed lattice and eliminates candidates outside the established boundary.

    摘要翻译： 在至少一些实施例中，无线通信系统包括通过通信信道发送信号的发射机。 该系统还包括接收信号作为通信信道的输出的接收机。 接收机为变换的格子建立边界，并消除建立边界以外的候选者。

    Dynamic resource allocation to improve MIMO detection performance
    48.
    发明授权
    Dynamic resource allocation to improve MIMO detection performance 有权
    动态资源分配，以提高MIMO检测性能

    公开(公告)号：US08040959B2

    公开(公告)日：2011-10-18

    申请号：US11926966

    申请日：2007-10-29

    申请人： Deric W. Waters ,  Naftali Sommer ,  Anuj Batra ,  Srinath Hosur

    发明人： Deric W. Waters ,  Naftali Sommer ,  Anuj Batra ,  Srinath Hosur

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04L25/03006 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： A method and apparatus for detecting symbols in a Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (“MIMO-OFDM”) system. A MIMO-OFDM receiver includes a first detector that estimates a symbol of a first MIMO-OFDM sub-carrier and a second detector that estimates a symbol of a second MIMO-OFDM sub-carrier. The second detector differs in complexity from the first detector. A detector control block is coupled to the detectors. The detector control block assigns the first detector to process the first MIMO-OFDM sub-carrier and assigns the second detector to process the second MIMO-OFDM sub-carrier. The detector control block computes a list metric for a sub-carrier. Based on the list metric the detector control block assigns a candidate symbol list length to the detector processing the sub-carrier. Alternately, the detector control block assigns one of a variety of detector types to a sub-carrier based on the sub-carrier list metric.

    摘要翻译： 一种用于在多输入多输出正交频分复用（“MIMO-OFDM”）系统中检测符号的方法和装置。 MIMO-OFDM接收机包括估计第一MIMO-OFDM子载波的符号的第一检测器和估计第二MIMO-OFDM子载波的符号的第二检测器。 第二检测器的复杂性与第一检测器不同。 检测器控制块耦合到检测器。 检测器控制块分配第一检测器来处理第一MIMO-OFDM子载波，并且分配第二检测器来处理第二MIMO-OFDM子载波。 检测器控制块计算子载波的列表度量。 基于列表度量，检测器控制块将候选符号列表长度分配给处理子载波的检测器。 或者，检测器控制块基于子载波列表度量将各种检测器类型中的一种分配给子载波。

    Versatile system for dual carrier transformation in orthogonal frequency division multiplexing
    49.
    发明授权
    Versatile system for dual carrier transformation in orthogonal frequency division multiplexing 有权
    用于正交频分复用的双载波变换的多功能系统

    公开(公告)号：US07668075B2

    公开(公告)日：2010-02-23

    申请号：US11099317

    申请日：2005-04-05

    申请人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Anuj Batra

    发明人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Anuj Batra

    IPC分类号： H04J11/00

    CPC分类号： H04L27/2602 ,  H04B1/7176

    摘要： Embodiments of the invention provide a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system, particularly an ultra-wideband (UWB) system. The present invention provides a data input, which passes data to a randomizer. The data then passes to a convolutional code function (206), the output of which is punctured by puncturing function. An interleaver function receives the punctured code data, and cooperatively operates with a mapper element to prepare the coded data for pre-transmission conversion by an IFFT. The mapper element comprises a dual carrier modulation function, which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.

    摘要翻译： 本发明的实施例提供了一种通用系统，用于在正交频分复用（OFDM）系统，特别是超宽带（UWB）系统内的多个载波路径上选择性地扩展载波数据。 本发明提供一种将数据传递给随机发生器的数据输入。 数据然后传递到卷积码功能（206），其输出由穿孔功能打孔。 交织器功能接收穿孔码数据，并与映射器元件协作操作以通过IFFT准备用于预传输转换的编码数据。 映射器元件包括双载波调制功能，其将两个穿孔码数据元素相关联并变换为用于在两个分离的信号音调上传输的格式。