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1. 发明授权

US07559010B2 Short length LDPC (Low Density Parity Check) code and modulation adapted for high speed Ethernet applications 失效
标题翻译：适用于高速以太网应用的短长度LDPC（低密度奇偶校验）码和调制
公开(公告)号：US07559010B2
公开(公告)日：2009-07-07
申请号：US11190657
申请日：2005-07-27
申请人： Ba-Zhong Shen , Kelly Brian Cameron , Hau Thien Tran , Scott Richard Powell
发明人： Ba-Zhong Shen , Kelly Brian Cameron , Hau Thien Tran , Scott Richard Powell
IPC分类号： H03M13/00
CPC分类号： H04L27/04 , H03M13/118 , H03M13/255 , H04L25/4917 , H04L27/3416
摘要： A short length LDPC (Low Density Parity Check) code and modulation adapted for high speed Ethernet applications. In some instances, the short length LDPC code and modulation may be employed within the recommended practices currently being developed by the IEEE 802.3an (10GBASE-T) Task Force. The IEEE 802.3an (10GBASE-T) Task Force has been commissioned to develop and standardize communications protocol adapted particularly for Ethernet operation over 4 wire twisted pair cables. A new LDPC code, some possible embodiments of constellations and the corresponding mappings, as well as possible embodiments of various parity check matrices, H, of the LDPC code are presented herein to provide for better overall performance than other proposed LDPC codes existent in the art of high speed Ethernet applications. Moreover, this proposed LDPC code may be decoded using a communication device having much less complexity than required to decode other proposed LDPC codes existent in this technology space.
摘要翻译：适用于高速以太网应用的短长度LDPC（低密度奇偶校验）码和调制。在一些情况下，可以在IEEE 802.3an（10GBASE-T）任务组正在开发的推荐实践中采用短长度LDPC码和调制。 IEEE 802.3an（10GBASE-T）工作组已委托开发和标准化通信协议，特别适用于通过4线双绞线电缆进行以太网操作。本文中呈现了新的LDPC码，星座的一些可能的实施例和对应的映射以及LDPC码的各种奇偶校验矩阵H的可能实施例，以提供比本领域中存在的其它提出的LDPC码更好的总体性能的高速以太网应用。此外，该提出的LDPC码可以使用比在该技术空间中存在的其它提出的LDPC码要求更低的复杂度的通信设备进行解码。

2. 发明授权

US07515642B2 LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and associated labeling 失效
标题翻译： LDPC（低密度奇偶校验）编码128 DSQ（双方QAM）星座调制和相关标签
公开(公告)号：US07515642B2
公开(公告)日：2009-04-07
申请号：US11211210
申请日：2005-08-25
申请人： Gottfried Ungerboeck , Ba-Zhong Shen , Scott Richard Powell , Kelly Brian Cameron , Hau Thien Tran
发明人： Gottfried Ungerboeck , Ba-Zhong Shen , Scott Richard Powell , Kelly Brian Cameron , Hau Thien Tran
IPC分类号： H04L5/12
CPC分类号： H03M13/255 , H03M13/11 , H04L25/4975 , H04L27/3405 , H04L27/3427
摘要： LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and its associated labeling. A novel means is introduced by which a constellation may be arranged and mapping in its symbols may be determined to provide for improved performance. One application area in which this may be employed is transmission over twisted pair (typically copper) cabling existent within data centers of various networks. The operation of the IEEE 802.3 Ethernet local area networks currently being used (as well as those currently under development) would benefit greatly by employing the various principles presented herein. When this novel approach of an LDPC coded 128 DSQ constellation modulation combined with TH (Tomlinson-Harashima) preceding is employed within a communication device at a transmitter end of a communication channel (i.e., in a transmitter and/or a transceiver), the overall operation of a communication system may improve significantly when compared to prior techniques.
摘要翻译： LDPC（低密度奇偶校验）编码128 DSQ（双方QAM）星座调制及其相关标签。引入了一种新颖的装置，通过该装置可以布置星座，并且可以确定其符号中的映射以提供改进的性能。可以采用这种方式的一个应用领域是在各种网络的数据中心内存在的双绞线（通常为铜缆）布线。目前正在使用的IEEE 802.3以太网局域网（以及目前正在开发中的那些）的运行将通过采用本文呈现的各种原理而受益匪浅。当在通信信道（即，在发射机和/或收发机）的发射机端的通信设备内采用与TH（Tomlinson-Harashima）组合的LDPC编码的128个DSQ星座调制的新颖方法时，与现有技术相比，通信系统的操作可以显着改善。

3. 发明授权

US07401283B2 Amplifying magnitude metric of received signals during iterative decoding of LDPC (Low Density Parity Check) code and LDPC coded modulation 有权
标题翻译：在LDPC（低密度奇偶校验）码和LDPC编码调制的迭代解码期间，放大接收信号的幅度度量
公开(公告)号：US07401283B2
公开(公告)日：2008-07-15
申请号：US11190334
申请日：2005-07-27
申请人： Ba-Zhong Shen , Kelly Brian Cameron , Scott Richard Powell , Hau Thien Tran
发明人： Ba-Zhong Shen , Kelly Brian Cameron , Scott Richard Powell , Hau Thien Tran
IPC分类号： H03M13/00
CPC分类号： H03M13/658 , H03M13/1111
摘要： Amplifying magnitude metric of received signals during iterative decoding of LDPC code and LDPC coded modulation. By appropriately selecting a metric coefficient value that is used to calculate the initial conditions when decoding LDPC coded signals, a significant reduction in BER may be achieved at certain SNRs. The appropriate selection of the metric coefficient value may be performed depending on the particular SNR at which a communication system is operating. By adjusting this metric coefficient value according to the given LDPC code, modulation, and noise variance, the overall performance of the decoding may be significantly improved. The convergence speed is slowed down so that the decoder will not go to the wrong codeword, and the moving range of the outputs of the decoder is restricted so that the output will not oscillate too much and will eventually move to the correct codeword.
摘要翻译：在LDPC码和LDPC编码调制的迭代解码期间放大接收信号的幅度度量。通过在解码LDPC编码信号时适当地选择用于计算初始条件的度量系数值，可以在某些SNR下实现BER的显着降低。可以根据通信系统正在操作的特定SNR来执行度量系数值的适当选择。通过根据给定的LDPC码，调制和噪声方差调整该度量系数值，可以显着提高解码的整体性能。收敛速度变慢，因此解码器不会进入错误的码字，解码器的输出的移动范围受到限制，使得输出不会振荡太多，最终会移动到正确的码字。

4. 发明授权

US07536629B2 Construction of LDPC (Low Density Parity Check) codes using GRS (Generalized Reed-Solomon) code 有权
标题翻译：使用GRS（广义里德 - 所罗门）代码构建LDPC（低密度奇偶校验）码
公开(公告)号：US07536629B2
公开(公告)日：2009-05-19
申请号：US11190333
申请日：2005-07-27
申请人： Ba-Zhong Shen , Scott Richard Powell , Kelly Brian Cameron , Hau Thien Tran
发明人： Ba-Zhong Shen , Scott Richard Powell , Kelly Brian Cameron , Hau Thien Tran
IPC分类号： H03M12/00
CPC分类号： H03M13/255 , H03M7/30 , H03M13/03 , H03M13/033 , H03M13/1102 , H03M13/15 , H03M13/1515
摘要： Construction of LDPC (Low Density Parity Check) codes using GRS (Generalized Reed-Solomon) code. A novel approach is presented by which a GRS code may be employed to generate a wide variety of types of LDPC codes. Such GRS based LDPC codes may be employed within various types of transceiver devices implemented within communication systems. This approach may be employed to generate GRS based LDPC codes particular designed for various application arenas. As one example, such a GRS based LDPC code may be specifically designed for use in communication systems that operate in accordance with any standards and/or recommended practices of the IEEE P802.3an (10GBASE-T) Task Force.
摘要翻译：使用GRS（广义里德 - 所罗门）代码构建LDPC（低密度奇偶校验）码。提出了一种新颖的方法，通过该方法可以采用GRS代码来生成各种各样的LDPC码。这种基于GRS的LDPC码可以在通信系统内实现的各种类型的收发信机中使用。可以采用该方法来生成针对各种应用领域特别设计的基于GRS的LDPC码。作为一个示例，这样的基于GRS的LDPC码可以专门设计用于根据IEEE P802.3an（10GBASE-T）任务组的任何标准和/或推荐做法进行操作的通信系统。

5. 发明授权

US08898547B2 Rate control adaptable communications 有权
标题翻译：速率控制适应通信
公开(公告)号：US08898547B2
公开(公告)日：2014-11-25
申请号：US12463386
申请日：2009-05-09
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： H03M13/00 , H03M13/39 , H03M13/29 , H03M13/25
CPC分类号： H03M13/3905 , H03M13/256 , H03M13/258 , H03M13/2957 , H03M13/3988 , H03M13/6362 , H03M13/6516
摘要： Rate control adaptable communications. A common trellis is employed at both ends of a communication system (in an encoder and decoder) to code and decode data at different rates. The encoding employs a single encoder whose output bits may be selectively punctured to support multiple modulations (constellations and mappings) according to a rate control sequence. A single decoder is operable to decode each of the various rates at which the data is encoded by the encoder. The rate control sequence may include a number of rate controls arranged in a period that is repeated during encoding and decoding. Either one or both of the encoder and decoder may adaptively select a new rate control sequence based on a variety of operational parameters including operating conditions of the communication system, a change in signal to noise ratio (SNR), etc.
摘要翻译：速率控制适应通信。在通信系统（编码器和解码器）的两端采用通用网格，以不同速率对数据进行编码和解码。编码采用单个编码器，其输出位可以被选择性地打孔以支持根据速率控制序列的多个调制（星座和映射）。单个解码器可操作以解码编码器对数据进行编码的各种速率中的每一个。速率控制序列可以包括在编码和解码期间重复的周期中布置的速率控制的数量。编码器和解码器中的一个或两者可以基于包括通信系统的操作条件，信噪比（SNR）等的变化的各种操作参数自适应地选择新的速率控制序列。

6. 发明授权

US08370731B2 LDPC (low density parity check) codes with corresponding parity check matrices selectively constructed with CSI (cyclic shifted identity) and null sub-matrices 有权
标题翻译：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
公开(公告)号：US08370731B2
公开(公告)日：2013-02-05
申请号：US13423381
申请日：2012-03-19
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： G06F11/10
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，其中的所有元素是0的值）。

7. 发明授权

US08250432B2 Variable modulation with LDPC (low density parity check) coding 有权
标题翻译：具有LDPC（低密度奇偶校验）编码的可变调制
公开(公告)号：US08250432B2
公开(公告)日：2012-08-21
申请号：US13116403
申请日：2011-05-26
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： H03M13/00
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. Variable modulation encoding of LDPC coded symbols is presented. 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LDPC编码符号的可变调制编码。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。

8. 发明授权

US07975202B2 Variable modulation with LDPC (low density parity check) coding 失效
标题翻译：具有LDPC（低密度奇偶校验）编码的可变调制
公开(公告)号：US07975202B2
公开(公告)日：2011-07-05
申请号：US11542484
申请日：2006-10-03
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： H03M13/00
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 with LDPC (Low Density Parity Check) coding provides for generation of LDPC coded symbols having different respective code rates and/or modulations. In addition, appropriate 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, and/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：使用LDPC（低密度奇偶校验）编码的可变调制提供具有不同的相应代码率和/或调制的LDPC编码符号的生成。此外，也可以执行生成LDPC可变码率信号的适当的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，星座形状和/或映射中的任何一个或多个可以像按符号依据一样频繁地变化。

9. 发明申请

US20100138721A1 Overlapping sub-matrix based LDPC (Low Density Parity Check) decoder 有权
标题翻译：重叠的基于子矩阵的LDPC（低密度奇偶校验）解码器
公开(公告)号：US20100138721A1
公开(公告)日：2010-06-03
申请号：US12651453
申请日：2010-01-01
申请人： Hau Thien Tran , Kelly Brian Cameron , Ba-Zhong Shen , Tak K. Lee
发明人： Hau Thien Tran , Kelly Brian Cameron , Ba-Zhong Shen , Tak K. Lee
IPC分类号： H03M13/29 , G06F11/10 , H03M13/05
CPC分类号： H03M13/1162 , H03M13/1117 , H03M13/112 , H03M13/1122 , H03M13/1125 , H03M13/1137 , H03M13/114 , H03M13/1165 , H03M13/1185 , H03M13/616 , H03M13/6505 , H03M13/658 , H03M13/6583
摘要： Overlapping sub-matrix based LDPC (Low Density Parity Check) decoder. Novel decoding approach is presented, by which, updated bit edge messages corresponding to a sub-matrix of an LDPC matrix are immediately employed for updating of the check edge messages corresponding to that sub-matrix without requiring storing the bit edge messages; also updated check edge messages corresponding to a sub-matrix of the LDPC matrix are immediately employed for updating of the bit edge messages corresponding to that sub-matrix without requiring storing the check edge messages. Using this approach, twice as many decoding iterations can be performed in a given time period when compared to a system that performs updating of all check edge messages for the entire LDPC matrix, then updating of all bit edge messages for the entire LDPC matrix, and so on. When performing this overlapping approach in conjunction with min-sum processing, significant memory savings can also be achieved.
摘要翻译：重叠的基于子矩阵的LDPC（低密度奇偶校验）解码器。提出了新的解码方法，通过该方法，立即采用对应于LDPC矩阵的子矩阵的更新的位边消息来更新与该子矩阵相对应的校验边消息，而不需要存储位边消息; 立即采用对应于LDPC矩阵的子矩阵的更新的校验边消息来更新与该子矩阵相对应的位边消息，而不需要存储校验边消息。与执行整个LDPC矩阵的所有校验边消息的更新的系统相比，使用这种方法，在给定时间段内可以执行两倍的解码迭代，然后更新整个LDPC矩阵的所有位边消息，以及所以。当结合最小和处理执行这种重叠方法时，也可以节省大量的内存。

10. 发明申请

US20090327847A1 LDPC (Low Density Parity Check) codes with corresponding parity check matrices selectively constructed with CSI (Cyclic Shifted Identity) and null sub-matrices 失效
标题翻译：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
公开(公告)号：US20090327847A1
公开(公告)日：2009-12-31
申请号：US12533306
申请日：2009-07-31
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： G06F11/10
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”）。

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