公开(公告)号：US08601349B2

公开(公告)日：2013-12-03

申请号：US13220310

申请日：2011-08-29

申请人： June Chul Roh ,  Anuj Batra ,  Srinath Hosur

发明人： June Chul Roh ,  Anuj Batra ,  Srinath Hosur

IPC分类号： H03M13/00

CPC分类号： H04L69/22 ,  H03M13/152 ,  H03M13/155 ,  H04L1/0057 ,  H04L1/0079 ,  H04L1/1812 ,  H04L43/0823

摘要： Apparatus and method for processing a physical layer protocol convergence (PLCP) header. In one embodiment, a wireless device includes a PLCP header processor. The PLCP header processor is configured to: process a physical layer header, process a check value based on the physical layer header, and process an error correction code based on the physical layer header and the check value. A concatenation of the physical layer header, check value, and error correction code the PLCP header processor is configured to process consists of a number of information bits that is an integer multiple of a number of information bits per symbol used to encode the PLCP header.

公开(公告)号：US08553730B2

公开(公告)日：2013-10-08

申请号：US12868397

申请日：2010-08-25

申请人： Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

发明人： Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

IPC分类号： H04J3/06

CPC分类号： H04W56/001 ,  H04L27/2613 ,  H04L27/2634 ,  H04W4/80

摘要： A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN.

摘要翻译： 一种方法包括接收包括复数部分的第一多个符号。 该方法还包括将共轭对称性应用于第一多个符号，产生不包含复杂部分的第二多个符号。 该方法还包括使用快速傅里叶反变换来变换第二多个符号，产生第三个多个符号。 该方法还包括内插第三多个符号，产生包括第三多个符号的至少一个实部的短训练场，产生包括第三多个符号的至少一个实部的长训练场，并发送 短期培训领域和长期培训领域的WPAN。

公开(公告)号：US08391228B2

公开(公告)日：2013-03-05

申请号：US12760513

申请日：2010-04-14

申请人： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

发明人： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

IPC分类号： H04W4/00 ,  H04W72/04

CPC分类号： H04W4/80 ,  H04L27/18 ,  H04L27/20 ,  H04L27/2675 ,  H04L69/22 ,  H04W52/36 ,  H04W52/367 ,  H04W72/0453 ,  H04W74/0816

摘要： In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to construct a physical-layer service data unit (PSDU) based on a concatenate block, an insert shortened bits block, a Bose, Ray-Chaudhuri, Hocquenghem (BCH) encoder, a remove shortened bits block, an add pad bits block, a spreader, a bit interleaver, a scrambler, and a symbol mapper.

摘要翻译： 在至少一些实施例中，通信设备包括具有物理（PHY）层的收发器。 基于用于BAN分组传输的恒定符号速率并且基于M-ary PSK，差分M-ary PSK或旋转差分M-ary PSK调制，PHY层被配置用于在有限多径环境中的体区域网络（BAN）操作。 PHY层被配置为基于级联块，插入缩短的比特块，Bose，Ray-Chaudhuri，Hocquenghem（BCH）编码器，移除缩短的比特块，加法来构造物理层服务数据单元（PSDU） 填充比特块，扩展器，比特交织器，加扰器和符号映射器。

公开(公告)号：US08155217B2

公开(公告)日：2012-04-10

申请号：US12016967

申请日：2008-01-18

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

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

IPC分类号： H04K1/10

CPC分类号： H04L27/2601 ,  H04B7/0413 ,  H04L25/0202

摘要： Systems and methods for providing multiple-input multiple-output (MIMO) detection, comprising a leaf node predictor for receiving a processed communications stream, computing at least one channel metric corresponding to the communications stream for a given channel realization by optimizing a predetermined probability, and analytically generating at least one parameter to output, which at least one parameter corresponds to at least one predicted best leaf node candidate for the given channel realization. The leaf-node predictor may generate, in real-time and without using a look-up table, at least one parameter directly from a given channel metric. Some embodiments analytically generate at least one parameter value for use by a MIMO detector corresponding to a channel metric and store the generated at least one parameter value and corresponding channel metric in a look-up table.

摘要翻译： 用于提供多输入多输出（MIMO）检测的系统和方法，包括用于接收经处理的通信流的叶节点预测器，通过优化预定概率来计算与所述通信流相对应的至少一个信道度量用于给定信道实现， 并且分析地生成至少一个要输出的参数，所述至少一个参数对应于给定信道实现的至少一个预测的最佳叶节点候选。 叶节点预测器可以实时地和不使用查找表来生成直接来自给定信道度量的至少一个参数。 一些实施例分析地生成至少一个参数值，供由MIMO信号检测器对应于信道度量使用，并将生成的至少一个参数值和对应的信道度量存储在查找表中。

公开(公告)号：US20110200148A1

公开(公告)日：2011-08-18

申请号：US13095120

申请日：2011-04-27

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

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

IPC分类号： H04L27/06

CPC分类号： H04L27/2601 ,  H04B7/0413 ,  H04L25/0202

摘要： Systems and methods for providing multiple-input multiple-output (MIMO) detection, comprising a leaf node predictor for receiving a processed communications stream, computing at least one channel metric corresponding to the communications stream for a given channel realization by optimizing a predetermined probability, and analytically generating at least one parameter to output, which at least one parameter corresponds to at least one predicted best leaf node candidate for the given channel realization. The leaf-node predictor may generate, in real-time and without using a look-up table, at least one parameter directly from a given channel metric. Some embodiments analytically generate at least one parameter value for use by a MIMO detector corresponding to a channel metric and store the generated at least one parameter value and corresponding channel metric in a look-up table.

摘要翻译： 用于提供多输入多输出（MIMO）检测的系统和方法，包括用于接收经处理的通信流的叶节点预测器，通过优化预定概率来计算与所述通信流相对应的至少一个信道度量用于给定信道实现， 并且分析地生成至少一个要输出的参数，所述至少一个参数对应于给定信道实现的至少一个预测的最佳叶节点候选。 叶节点预测器可以实时地和不使用查找表来生成直接来自给定信道度量的至少一个参数。 一些实施例分析地生成至少一个参数值，供由MIMO信号检测器对应于信道度量使用，并将生成的至少一个参数值和对应的信道度量存储在查找表中。

公开(公告)号：US20110176642A1

公开(公告)日：2011-07-21

申请号：US13079944

申请日：2011-04-05

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

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

IPC分类号： H04L27/06

CPC分类号： H04L27/2601 ,  H04L25/0202

摘要： A method for building a look-up table for a receiver in a multiple-input multiple-output (MIMO) detection system simulates a MIMO detector over many channel realizations, tracks channel metric and parameter values used for each channel realization resulting from such simulating, and stores, in a look-up table, best values of the tracked values used for a particular channel metric.

摘要翻译： 用于构建多输入多输出（MIMO）检测系统中的接收机的查找表的方法通过许多信道实现来模拟MIMO检测器，跟踪由这样的模拟产生的每个信道实现所使用的信道度量和参数值， 并且在查找表中存储用于特定信道度量的被跟踪值的最佳值。

公开(公告)号：US07974334B2

公开(公告)日：2011-07-05

申请号：US12022307

申请日：2008-01-30

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

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

IPC分类号： H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC分类号： H04L25/03006 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03605

摘要： Embodiments provide systems and methods for a novel multiple-input multiple-output (MIMO) equalization technique that produces a channel matrix that contains partly real coefficients and partly complex coefficients, referred to herein as a hybrid-MIMO equalization. MIMO detectors can exploit the hybrid-MIMO equalization to reduce complexity. Some embodiments provide systems and methods for equalizing a communication channel comprising receiving as an input a channel output vector, dividing the input into two vectors, a first vector that remains a complex number and a second vector that contains only real numbers, separating the second vector into its real and imaginary components, and regrouping the first and second vectors into a hybrid channel output vector that contains both real and complex coefficients.

摘要翻译： 实施例提供了一种新颖的多输入多输出（MIMO）均衡技术的系统和方法，其产生包含部分实系数和部分复系数的信道矩阵，这里称为混合MIMO均衡。 MIMO检测器可以利用混合MIMO均衡来降低复杂度。 一些实施例提供用于均衡通信信道的系统和方法，包括：接收作为输入的信道输出向量，将输入划分为两个向量，保留复数的第一向量和仅包含实数的第二向量，将第二向量 转换成其实部和虚部，并将第一和第二矢量重新分组成包含实数和复系数的混合信道输出向量。

公开(公告)号：US07957484B2

公开(公告)日：2011-06-07

申请号：US11930259

申请日：2007-10-31

申请人： Deric W. Waters ,  Naftali Sommer ,  Anuj Batra ,  Srinath Hosur ,  Doron Burshtein ,  Rafi Dalla Torre ,  Oren Peles ,  Daniel Wajcer

发明人： Deric W. Waters ,  Naftali Sommer ,  Anuj Batra ,  Srinath Hosur ,  Doron Burshtein ,  Rafi Dalla Torre ,  Oren Peles ,  Daniel Wajcer

IPC分类号： H04L27/00

CPC分类号： H04L25/03006 ,  H04L2025/03426

摘要： A method and system for performing Multiple-Input Multiple-Output (“MIMO”) detection that reduces complexity by decomposing MIMO detection problem into two less complex problems, Candidate List generation and Interference Cancellation (“CLIC”). Embodiments of the CLIC framework parse an N element channel output into a first set containing S elements and a second set containing N−S elements. A first list of candidate vectors is generated from the first set of elements. A set of interference cancelled elements is generated by using the first list of candidate vectors to cancel interference from the second set of elements. A second list of candidate vectors is generated from the set of interference cancelled elements. A minimum cost is computed for each bit of the candidate vectors and from the costs a log-likelihood ratio is computed.

摘要翻译： 一种用于执行多输入多输出（“MIMO”）检测的方法和系统，其通过将MIMO检测问题分解成两个较不复杂的问题，候选列表生成和干扰消除（“CLIC”）来降低复杂度。 CLIC框架的实施例将N元素信道输出解析为包含S个元素的第一集合和包含N-S个元素的第二集合。 从第一组元素生成候选向量的第一列表。 通过使用候选向量的第一列表来消除来自第二组元素的干扰来生成一组干扰消除元素。 从干扰消除元素的集合生成候选向量的第二列表。 针对候选向量的每一位计算最小成本，并从成本计算对数似然比。

公开(公告)号：US20100111138A1

公开(公告)日：2010-05-06

申请号：US12685404

申请日：2010-01-11

申请人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Anuj Batra

发明人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Anuj Batra

IPC分类号： H04B1/69

CPC分类号： H04L27/2602 ,  H04B1/7176

摘要： The present invention provides 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, 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： 本发明提供了一种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的通用系统。 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，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。

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。