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    Amplifying magnitude metric of received signals during iterative decoding of LDPC (Low Density Parity Check) code and LDPC coded modulation
    1.
    发明授权
    Amplifying magnitude metric of received signals during iterative decoding of LDPC (Low Density Parity Check) code and LDPC coded modulation 有权
    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。

    Short length LDPC (Low Density Parity Check) code and modulation adapted for high speed Ethernet applications
    2.
    发明授权
    Short length LDPC (Low Density Parity Check) code and modulation adapted for high speed Ethernet applications 失效
    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。

    LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and associated labeling
    3.
    发明授权
    LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and associated labeling 失效
    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。

    Decoding error correcting codes transmitted through multiple wire twisted pair cables with uneven noise on the wires
    4.
    发明授权
    Decoding error correcting codes transmitted through multiple wire twisted pair cables with uneven noise on the wires 有权
    解码通过多线双绞线电缆传输的错误纠正码，导线上噪声不均匀

    公开(公告)号：US07587008B2

    公开(公告)日：2009-09-08

    申请号：US11172551

    申请日：2005-06-30

    申请人： Ba-Zhong Shen ,  Scott Richard Powell ,  Kelly Brian Cameron

    发明人： Ba-Zhong Shen ,  Scott Richard Powell ,  Kelly Brian Cameron

    IPC分类号： H04B1/10 ,  H04B1/38

    CPC分类号： H04L1/0045 ,  H03M13/45 ,  H04L1/02 ,  H04L25/14 ,  H04L2001/0096

    摘要： Decoding error correcting codes transmitted through multiple wire twisted pair cables with uneven noise on the wires. A novel approach is presented by which the metrics may be calculated for signals received over multi-wire (or alternatively referred to as multi-channel, and/or multi-path) communication channels to exploit an uneven distribution of noise among those wires for improved performance. In addition, this approach may also be performed in combination with employing an amplification factor to modify the metrics employed when performing ECC (Error Correcting Code) decoding. Moreover, when information is known concerning which 1 or more paths (e.g., wires) has an SNR that is different (e.g., lower in some cases) from the others, an even better adapted means of calculating the metrics associated with each of the paths (e.g., wires) may be employed to provide for improved performance with respect to iterative decoding processing of signals encoded using ECCs.

    摘要翻译： 解码通过多线双绞线电缆传输的错误纠正码，导线上噪声不均匀。 提出了一种新颖的方法，通过该方法可以针对通过多线（或者称为多通道和/或多路径）通信信道接收的信号计算度量，以利用这些线之间的不均匀分布的噪声来改善 性能。 此外，还可以结合使用放大因子来修改在执行ECC（纠错码）解码时采用的度量来执行该方法。 此外，当已知关于哪个1个或多个路径（例如，线路）具有不同于其他路径（例如，在某些情况下较低的）的SNR的信息时，更好地适用于计算与每个路径相关联的度量的装置 （例如，导线）可用于提供关于使用ECC编码的信号的迭代解码处理的改进的性能。

    Construction of LDPC (Low Density Parity Check) codes using GRS (Generalized Reed-Solomon) code
    5.
    发明授权
    Construction of LDPC (Low Density Parity Check) codes using GRS (Generalized Reed-Solomon) code 有权
    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。

    Rate control adaptable communications
    6.
    发明授权
    Rate control adaptable communications 有权
    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。

    LDPC (low density parity check) code size adjustment by shortening and puncturing
    7.
    发明授权
    LDPC (low density parity check) code size adjustment by shortening and puncturing 有权

    公开(公告)号：US08473817B2

    公开(公告)日：2013-06-25

    申请号：US12632552

    申请日：2009-12-07

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

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

    IPC分类号： H03M13/35

    CPC分类号： H03M13/116 ,  H03M13/1185 ,  H03M13/1188 ,  H03M13/618 ,  H03M13/6362

    摘要： LDPC (Low Density Parity Check) code size adjustment by shortening and puncturing. A variety of LDPC coded signals may be generated from an initial LDPC code using selected shortening and puncturing. Using LDPC code size adjustment approach, a single communication device whose hardware design is capable of processing the original LDPC code is also capable to process the various other LDPC codes constructed from the original LDPC code after undergoing appropriate shortening and puncturing. This provides significant design simplification and reduction in complexity because the same hardware can be implemented to accommodate the various LDPC codes generated from the original LDPC code. Therefore, a multi-LDPC code capable communication device can be implemented that is capable to process several of the generated LDPC codes. This approach allows for great flexibility in the LDPC code design, in that, the original code rate can be maintained after performing the shortening and puncturing.

    LDPC (low density parity check) codes with corresponding parity check matrices selectively constructed with CSI (cyclic shifted identity) and null sub-matrices
    8.
    发明授权
    LDPC (low density parity check) codes with corresponding parity check matrices selectively constructed with CSI (cyclic shifted identity) and null sub-matrices 有权
    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）。