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    • 55. 发明授权
    • Dynamic resource allocation to improve MIMO detection performance
    • 动态资源分配,以提高MIMO检测性能
    • US08040959B2
    • 2011-10-18
    • US11926966
    • 2007-10-29
    • Deric W. WatersNaftali SommerAnuj BatraSrinath Hosur
    • Deric W. WatersNaftali SommerAnuj BatraSrinath Hosur
    • H04K1/10H04L27/28
    • H04L25/03006H04L2025/03414H04L2025/03426
    • 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.
    • 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。
    • 56. 发明授权
    • Versatile system for dual carrier transformation in orthogonal frequency division multiplexing
    • 用于正交频分复用的双载波变换的多功能系统
    • US07668075B2
    • 2010-02-23
    • US11099317
    • 2005-04-05
    • Srinath HosurJaiganesh BalakrishnanAnuj Batra
    • Srinath HosurJaiganesh BalakrishnanAnuj Batra
    • H04J11/00
    • H04L27/2602H04B1/7176
    • 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.
    • 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。
    • 58. 发明授权
    • Low-complexity, symbol-based, reduced substreams maximum likelihood decoder and method for a multiple-input, multiple-output communication system
    • 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
    • US07321644B2
    • 2008-01-22
    • US10863455
    • 2004-06-08
    • David J. LoveSrinath HosurAnuj Batra
    • David J. LoveSrinath HosurAnuj Batra
    • H03D1/00
    • H04L1/005H04B7/04H04L25/0204H04L27/2601
    • 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.
    • 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。
    • 59. 发明申请
    • Versatile system for dual carrier transformation in orthogonal frequency division multiplexing
    • 用于正交频分复用的双载波变换的多功能系统
    • US20050232137A1
    • 2005-10-20
    • US11099317
    • 2005-04-05
    • Srinath HosurJaiganesh BalakrishnanAnuj Batra
    • Srinath HosurJaiganesh BalakrishnanAnuj Batra
    • H04B1/69H04B7/216H04J11/00H04L27/26
    • H04L27/2602H04B1/7176
    • The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system (200), particularly an ultra-wideband (UWB) system. The present invention provides a data input (202), which passes data to a randomizer (204). The data then passes to a convolutional code function (206), the output of which is punctured by puncturing function (208). An interleaver function (210) receives the punctured code data, and cooperatively operates with a mapper element (218) to prepare the coded data for pre-transmission conversion by an IFFT (220). The mapper element (218) comprises a dual carrier modulation function (216), which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.
    • 本发明提供了一种通用系统,用于在正交频分复用(OFDM)系统(200),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(204)的数据输入(202)。 数据然后传递到卷积码功能(206),其输出被穿孔功能(208)打孔。 交织器功能(210)接收穿孔码数据,并与映射器元件(218)协作操作,以通过IFFT(220)准备用于预传输转换的编码数据。 映射器元件(218)包括双载波调制功能(216),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。