公开(公告)号：US07370265B2

公开(公告)日：2008-05-06

申请号：US11701155

申请日：2007-02-01

申请人： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Brian Cameron

发明人： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Brian Cameron

IPC分类号： H03M13/03

CPC分类号： H04L1/005 ,  H03M5/20 ,  H03M13/1102 ,  H03M13/1105 ,  H03M13/1111 ,  H03M13/1148 ,  H03M13/1177 ,  H03M13/255 ,  H03M13/256 ,  H03M13/258 ,  H03M13/2957 ,  H03M13/4161 ,  H03M13/45 ,  H03M13/6561 ,  H04L1/0041 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/0071 ,  H04L27/18 ,  H04L27/183 ,  H04L27/186 ,  H04L27/2053

摘要： Bandwidth efficient coded modulation scheme based on MLC (Multi-Level Code) signals having multiple maps. The use of multiple maps is adapted to various types of coded signals including multi-level LDPC coded modulation signals and other MLC signals to provide for a significant performance gain in the continual effort trying to reach towards Shannon's limit. In the instance of LDPC coded signals, various level LDPC codewords (e.g., an MLC block) are generated from individual corresponding LDPC encoders. These various level LDPC codewords are arranged into a number of sub-blocks that corporately form an MLC block. Encoded bits from levels of the MLC block are arranged to form symbols that are mapped according to at least two modulations. Each modulation includes a constellation shape and a corresponding mapping. This use of multiple mappings provides for improved performance when compared to encoders that employ only a single mapping.

摘要翻译： 基于具有多个映射的MLC（多级代码）信号的带宽高效编码调制方案。 多个地图的使用适用于各种类型的编码信​​号，包括多级LDPC编码调制信号和其他MLC信号，以便在试图达到香农限制的持续努力中提供显着的性能增益。 在LDPC编码信号的情况下，从各自对应的LDPC编码器生成各种级别的LDPC码字（例如，MLC块）。 这些各种级别的LDPC码字被排列成合并形成MLC块的多个子块。 MLC块的编码比特被排列成根据至少两个调制映射的符号。 每个调制包括星座形状和相应的映射。 与仅使用单个映射的编码器相比，使用多个映射提供了改进的性能。

公开(公告)号：US07321633B1

公开(公告)日：2008-01-22

申请号：US10338432

申请日：2003-01-08

申请人： Kelly Brian Cameron ,  Ba-Zhong Shen ,  Hau Thien Tran

发明人： Kelly Brian Cameron ,  Ba-Zhong Shen ,  Hau Thien Tran

IPC分类号： H04L23/02

CPC分类号： H04L27/0008 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/006 ,  H04L1/0066 ,  H04L1/0068 ,  H04L2001/0098

摘要： Determination of variable code rates for a rate control sequence. A rate control sequence governs symbols that are to be encoded and/or decoded. A different rate control value may be used to control code rates of individual symbols in a signal. The determination of the variable code rates may be performed based on a number of parameters including a communication system's operating conditions and/or the signal to noise ratio (SNR) of a communication channel. The variable code rates may also adaptively change, in real time (if desired), in response to the communication system's operating conditions including a communication channel's SNR. The variable code rate functionality may also be adaptively tailored to match the SNR of a communication receiver's communication channel within a multi-receiver communication system; those receivers in a beam spot (higher SNR) may operate using a higher code rate than those receivers further away from the spot (lower SNR).

摘要翻译： 确定速率控制序列的可变代码率。 速率控制序列控制要被编码和/或解码的符号。 可以使用不同的速率控制值来控制信号中的各个符号的码率。 可以基于包括通信系统的操作条件和/或通信信道的信噪比（SNR）的参数的数量来执行可变码率的确定。 响应于包括通信信道的SNR的通信系统的操作条件，可变码率也可以实时（如果需要）自适应地改变。 也可以自适应地定制可变码率功能以匹配多接收机通信系统内的通信接收机的通信信道的SNR; 波束点（较高SNR）中的那些接收机可以使用比远离该点（较低SNR）的那些接收机更高的码率来操作。

公开(公告)号：US07197690B2

公开(公告)日：2007-03-27

申请号：US11017087

申请日：2004-12-20

申请人： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Brian Cameron

发明人： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Brian Cameron

IPC分类号： H03M13/03

CPC分类号： H04L1/005 ,  H03M5/20 ,  H03M13/1102 ,  H03M13/1105 ,  H03M13/1111 ,  H03M13/1148 ,  H03M13/1177 ,  H03M13/255 ,  H03M13/256 ,  H03M13/258 ,  H03M13/2957 ,  H03M13/4161 ,  H03M13/45 ,  H03M13/6561 ,  H04L1/0041 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/0071 ,  H04L27/18 ,  H04L27/183 ,  H04L27/186 ,  H04L27/2053

摘要： Bandwidth efficient coded modulation scheme based on MLC (Multi-Level Code) signals having multiple maps. The use of multiple maps is adapted to various types of coded signals including multi-level LDPC coded modulation signals and other MLC signals to provide for a significant performance gain in the continual effort trying to reach towards Shannon's limit. In the instance of LDPC coded signals, various level LDPC codewords are generated from individual corresponding LDPC encoders. These various level LDPC codewords are arranged into a number of sub-blocks. Encoded bits from multiple level LDPC codewords within each of the sub-blocks are arranged to form symbols that are mapped according to at least two modulations. Each modulation includes a constellation shape and a corresponding mapping. This use of multiple mappings provides for improved performance when compared to encoders that employ only a single mapping.

摘要翻译： 基于具有多个映射的MLC（多级代码）信号的带宽高效编码调制方案。 多个地图的使用适用于各种类型的编码信​​号，包括多级LDPC编码调制信号和其他MLC信号，以便在试图达到香农限制的持续努力中提供显着的性能增益。 在LDPC编码信号的情况下，从各自对应的LDPC编码器生成各种级别的LDPC码字。 这些各种级别的LDPC码字被排列成多个子块。 每个子块内的多级LDPC码字的编码比特被排列成根据至少两个调制映射的符号。 每个调制包括星座形状和相应的映射。 这种使用多个映射

公开(公告)号：US07107511B2

公开(公告)日：2006-09-12

申请号：US10369168

申请日：2003-02-19

申请人： Ba-Zhong Shen ,  Kelly Brian Cameron ,  Hau Thien Tran

发明人： Ba-Zhong Shen ,  Kelly Brian Cameron ,  Hau Thien Tran

IPC分类号： H03M13/00

CPC分类号： H04L1/005 ,  H04L1/0057

摘要： Low Density Parity Check (LDPC) code decoder using min*, min**, max* or max** and their respective inverses. For the first time, min* processing is demonstrated for use in decoding LDPC-coded signals. In addition, max*, min**, or max** (and their respective inverses) may also be employed when performing calculations that are required to perform decoding of signals coded using LDPC code. These new parameters may be employed to provide for much improved decoding processing for LDPC codes when that decoding involves the determination of a minimal and/or maximal value, or a minimal and/or maximal log corrected value, from among a number of possible values. The total number of processing steps employed within the decoding of an LDPC-coded signal is significantly reduced be employing the min*, max*, min**, or max** (and their respective inverses) decoding processing described herein.

摘要翻译： 使用min *，min **，max *或max **的低密度奇偶校验（LDPC）码解码器及其各自的反转。 首次演示了用于解码LDPC编码信号的min *处理。 另外，当执行执行使用LDPC码编码的信号的解码所需的计算时，也可以采用max *，min **或max **（及其各自的反转）。 当解码涉及从多个可能值中确定最小和/或最大值或最小和/或最大对数校正值时，可以采用这些新参数来为LDPC码提供大大改进的解码处理。 采用本文所述的最小*，最大*，最小**或最大**（及其相应的反转）解码处理，在LDPC编码信号的解码中采用的处理步骤的总数显着减少。

公开(公告)号：US07065695B2

公开(公告)日：2006-06-20

申请号：US10264647

申请日：2002-10-04

申请人： Kelly Brian Cameron ,  Ba-Zhong Shen ,  Hau Thien Tran ,  Linda K. Lau

发明人： Kelly Brian Cameron ,  Ba-Zhong Shen ,  Hau Thien Tran ,  Linda K. Lau

IPC分类号： H03M13/00

CPC分类号： H04L1/005 ,  H03M13/256 ,  H03M13/258 ,  H03M13/27 ,  H03M13/2767 ,  H03M13/2771 ,  H03M13/2785 ,  H03M13/2957 ,  H03M13/4123 ,  H03M13/4161 ,  H04L1/006 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071

摘要： Metric calculation design for variable code rate decoding of broadband trellis, TCM (trellis coded modulated), or TTCM (turbo trellis coded modulation). A single design can accommodate a large number of code rates by multiplexing the appropriate paths within the design. By controlling where to scale for any noise of a received symbol within a received signal, this adaptable design may be implemented in a manner that is very efficient in terms of performance, processing requirements (such as multipliers and gates), as well as real estate consumption. In supporting multiple code rates, appropriately selection of the coefficients of the various constellations employed, using the inherent redundancy and symmetry along the I and Q axes, can result in great savings of gates borrowing upon the inherent redundancy contained therein; in addition, no subtraction (but only summing) need be performed when capitalizing on this symmetry.

摘要翻译： 宽带网格，TCM（网格编码调制）或TTCM（turbo网格编码调制）的可变码率解码的度量计算设计。 单一设计可以通过在设计中复用适当的路径来适应大量的代码率。 通过控制在接收信号中对接收到的符号的任何噪声进行缩放的位置，可以以在性能，处理要求（例如乘法器和门）等方面非常有效的方式来实现这种适应性设计，以及房地产 消费。 在支持多个码率的情况下，使用沿I和Q轴的固有冗余和对称性适当地选择所使用的各种星座的系数，可以大大节省借助于其中包含的固有冗余的门; 此外，当利用这种对称性时，不需要执行减法（但只有求和）。

公开(公告)号：US20050114748A9

公开(公告)日：2005-05-26

申请号：US10669066

申请日：2003-09-23

申请人： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Cameron

发明人： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Cameron

IPC分类号： G11B20/18 ,  H03M13/11 ,  H03M13/25 ,  H03M13/29 ,  H03M13/41 ,  H03M13/45 ,  H04L1/00 ,  H04L1/16 ,  H04L27/18 ,  H04L27/26 ,  H03M13/00 ,  G06F11/00

CPC分类号： H03M13/6561 ,  G11B20/18 ,  G11B20/1833 ,  H03M13/11 ,  H03M13/1102 ,  H03M13/1105 ,  H03M13/25 ,  H03M13/255 ,  H03M13/256 ,  H03M13/258 ,  H03M13/27 ,  H03M13/2767 ,  H03M13/2771 ,  H03M13/2785 ,  H03M13/2957 ,  H03M13/4123 ,  H03M13/4161 ,  H03M13/45 ,  H03M13/6362 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/1671 ,  H04L27/18 ,  H04L27/2602

摘要： Variable modulation within combined LDPC (Low Density Parity Check) coding and modulation coding systems. A novel approach is presented for variable modulation encoding of LDPC coded symbols. In addition, LDPC encoding, that generates an LDPC variable code rate signal, may also be performed as well. The encoding can generate an LDPC variable code rate and/or modulation signal whose code rate and/or modulation may vary as frequently as on a symbol by symbol basis. Some embodiments employ a common constellation shape for all of the symbols of the signal sequence, yet individual symbols may be mapped according different mappings of the commonly shaped constellation; such an embodiment may be viewed as generating a LDPC variable mapped signal. In general, any one or more of the code rate, constellation shape, or mapping of the individual symbols of a signal sequence may vary as frequently as on a symbol by symbol basis.

摘要翻译： 组合LDPC（低密度奇偶校验）编码和调制编码系统中的可变调制。 提出了一种用于LDPC编码符号的可变调制编码的新颖方法。 此外，也可以执行生成LDPC可变码率信号的LDPC编码。 该编码可以生成其码率和/或调制可以像逐个符号一样频繁地变化的LDPC可变码率和/或调制信号。 一些实施例对信号序列的所有符号采用公共星座形状，但是可以根据共同形状的星座图的不同映射来映射各个符号; 这样的实施例可以被视为生成LDPC可变映射信号。 通常，信号序列的各个符号的码率，星座形状或映射中的任何一个或多个可以像逐个符号一样频繁地变化。

公开(公告)号：US08631312B2

公开(公告)日：2014-01-14

申请号：US13753579

申请日：2013-01-30

申请人： Ba-Zhong Shen ,  Hau Thien Tran ,  Tak K. Lee ,  Kelly Brian Cameron

发明人： Ba-Zhong Shen ,  Hau Thien Tran ,  Tak K. Lee ,  Kelly Brian Cameron

IPC分类号： H03M13/00

CPC分类号： H03M13/1174 ,  H03M13/1151 ,  H03M13/1185 ,  H03M13/1188 ,  H03M13/1515 ,  H04L1/0068

摘要： LDPC (Low Density Parity Check) codes with corresponding parity check matrices selectively constructed with CSI (Cyclic Shifted Identity) and null sub-matrices. An LDPC matrix corresponding to an LDPC code is employed within a communication device to encode and/or decode coded signals for use in any of a number of communication systems. The LDPC matrix is composed of a number of sub-matrices and may be partitioned into a left hand side matrix and a right hand side matrix. The right hand side matrix may include two sub-matrix diagonals therein that are composed entirely of CSI (Cyclic Shifted Identity) sub-matrices; one of these two sub-matrix diagonals is located on the center sub-matrix diagonal and the other is located just to the left thereof. All other sub-matrices of the right hand side matrix may be null sub-matrices (i.e., all elements therein are values of zero “0”).

摘要翻译： 具有用CSI（循环移位身份）和空子矩阵选择性构造的相应奇偶校验矩阵的LDPC（低密度奇偶校验）码。 在通信设备内采用对应于LDPC码的LDPC矩阵来编码和/或解码用于多个通信系统中的任何一个的编码信号。 LDPC矩阵由多个子矩阵组成，并且可以被划分为左手侧矩阵和右手侧矩阵。 右手侧矩阵可以包括其中完全由CSI（循环移位身份）子矩阵组成的两个子矩阵对角线; 这两个子矩阵对角线之一位于中心子矩阵对角线上，另一个位于其左侧。 右侧方矩阵的所有其他子矩阵可以是空子矩阵（即，其中的所有元素为零“0”）。

公开(公告)号：US08407556B2

公开(公告)日：2013-03-26

申请号：US12413552

申请日：2009-03-28

申请人： Ba-Zhong Shen ,  Christopher J. Hansen ,  Joseph Paul Lauer ,  Kelly Brian Cameron ,  Tak K. Lee ,  Hau Thien Tran

发明人： Ba-Zhong Shen ,  Christopher J. Hansen ,  Joseph Paul Lauer ,  Kelly Brian Cameron ,  Tak K. Lee ,  Hau Thien Tran

IPC分类号： H03M13/00

CPC分类号： H04L27/2626 ,  H03M13/1148 ,  H03M13/116 ,  H03M13/255 ,  H03M13/6362 ,  H04B7/0617 ,  H04L1/0057 ,  H04L1/0071 ,  H04L5/0023 ,  H04L27/2647 ,  H04L27/34

摘要： LDPC (Low Density Parity Check) coding and interleaving implemented in multiple-input-multiple-output (MIMO) communication systems. As described herein, a wide variety of irregular LDPC codes may be generated using GRS or RS codes. A variety of communication device types are also presented that may employ the error correcting coding (ECC) using a GRS-based irregular LDPC code, along with appropriately selected interleaving, to provide for communications using ECC. These communication devices may be implemented to in wireless communication systems including those that comply with the recommendation practices and standards being developed by the IEEE 802.11n Task Group (i.e., the Task Group that is working to develop a standard for 802.11 TGn (High Throughput)).

摘要翻译： 在多输入多输出（MIMO）通信系统中实现的LDPC（低密度奇偶校验）编码和交织。 如本文所述，可以使用GRS或RS代码来生成各种不规则的LDPC码。 还提出了各种通信设备类型，其可以使用基于GRS的不规则LDPC码的纠错编码（ECC）以及适当选择的交织，以提供使用ECC的通信。 这些通信设备可以被实现在无线通信系统中，包括符合由IEEE 802.11n任务组（即，正在努力制定802.11Gn（高吞吐量）的标准的任务组）开发的推荐做法和标准的通信系统， ）。

公开(公告)号：US08301991B2

公开(公告)日：2012-10-30

申请号：US12957238

申请日：2010-11-30

申请人： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Brian Cameron

发明人： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Brian Cameron

IPC分类号： G06F11/00

CPC分类号： H04L27/2602 ,  G11B20/1833 ,  H03M13/1111 ,  H03M13/1117 ,  H03M13/112 ,  H03M13/25 ,  H03M13/255 ,  H03M13/256 ,  H03M13/258 ,  H03M13/2957 ,  H03M13/4161 ,  H03M13/45 ,  H03M13/6516 ,  H03M13/6583 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/1671 ,  H04L27/18

摘要： LDPC (Low Density Parity Check) coded modulation symbol decoding. Symbol decoding is supported by appropriately modifying an LDPC tripartite graph to eliminate the bit nodes thereby generating an LDPC bipartite graph (such that symbol nodes are appropriately mapped directly to check nodes thereby obviating the bit nodes). The edges that communicatively couple the symbol nodes to the check nodes are labeled appropriately to support symbol decoding of the LDPC coded modulation signal. The iterative decoding processing may involve updating the check nodes as well as estimating the symbol sequence and updating the symbol nodes. In some embodiments, an alternative hybrid decoding approach may be performed such that a combination of bit level and symbol level decoding is performed. This LDPC symbol decoding out-performs bit decoding only. In addition, it provides comparable or better performance of bit decoding involving iterative updating of the associated metrics.

摘要翻译： LDPC（低密度奇偶校验）编码调制符号解码。 通过适当地修改LDPC三部分图来消除比特节点从而生成LDPC二分图（使得符号节点被适当地映射到校验节点从而消除比特节点）来支持符号解码。 将符号节点通信地耦合到校验节点的边缘被适当地标记以支持LDPC编码调制信号的符号解码。 迭代解码处理可以包括更新校验节点以及估计符号序列和更新符号节点。 在一些实施例中，可以执行替代的混合解码方法，使得执行位电平和符号电平解码的组合。 该LDPC码解码仅执行比特解码。 此外，它提供可比较或更好的比特解码性能，涉及相关度量的迭代更新。

公开(公告)号：US08059740B2

公开(公告)日：2011-11-15

申请号：US10856023

申请日：2004-05-28

申请人： Christopher J. Hansen ,  Jason A. Trachewsky ,  Nambirajan Seshadri ,  Kelly Brian Cameron ,  Hau Thien Tran ,  Ba-Zhong Shen

发明人： Christopher J. Hansen ,  Jason A. Trachewsky ,  Nambirajan Seshadri ,  Kelly Brian Cameron ,  Hau Thien Tran ,  Ba-Zhong Shen

IPC分类号： H04L5/12

CPC分类号： H04W4/18 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0618 ,  H04L25/03866 ,  H04L27/2601 ,  H04W84/12 ,  H04W88/10

摘要： A wireless local area network (WLAN) transmitter includes a baseband processing module and a plurality of radio frequency (RF) transmitters. The baseband processing module is operably coupled to process data by scrambling the data in accordance with a pseudo random sequence to produce scrambled data. The processing of the data continues by selecting one of a plurality of encoding modes based on a mode selection signal. The processing of the data continues by encoding the scrambled data in accordance with the one of the plurality of encoding modes to produce encoded data. The processing of the data continues by determining a number of transmit streams based on the mode selection signal. The processing of the data further continues by converting the encoded data into streams of symbols in accordance with the number of transmit streams and the mode selection signal. A number of the plurality of RF transmitters are enabled based on the mode selection signal to convert a corresponding one of the streams of symbols into a corresponding RF signal such that a corresponding number of RF signals is produced.

摘要翻译： 无线局域网（WLAN）发射机包括基带处理模块和多个射频（RF）发射机。 基带处理模块可操作地耦合以通过根据伪随机序列对数据进行加扰来处理数据以产生加扰数据。 基于模式选择信号，选择多种编码模式之一来继续数据的处理。 通过根据多个编码模式之一对加扰数据进行编码，继续处理数据以产生编码数据。 通过基于模式选择信号确定多个发送流来继续处理数据。 根据发送流的数量和模式选择信号，将编码数据转换成符号流，继续处理数据。 基于模式选择信号启用多个RF发射机的数量，以将符号流中的相应一个码流转换为对应的RF信号，从而产生相应数量的RF信号。