专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US07516390B2 LDPC (Low Density Parity Check) coding and interleaving implemented in MIMO communication systems 有权
公开(公告)号：US07516390B2
公开(公告)日：2009-04-07
申请号：US11264998
申请日：2005-11-02
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)).

22. 发明授权

US07436902B2 Multi-dimensional space Gray code maps for multi-dimensional phase modulation as applied to LDPC (Low Density Parity Check) coded modulation 失效
标题翻译：多维空间适用于LDPC（低密度奇偶校验）编码调制的多维相位调制的格雷码映射
公开(公告)号：US07436902B2
公开(公告)日：2008-10-14
申请号：US10866542
申请日：2004-06-12
申请人： Ba-Zhong Shen , Tak K. Lee , Kelly Brian Cameron , Hau Thien Tran
发明人： Ba-Zhong Shen , Tak K. Lee , Kelly Brian Cameron , Hau Thien Tran
IPC分类号： H04L27/20 , H04L27/18 , H04L5/12
CPC分类号： H04L1/006 , H03M13/1117 , H03M13/112 , H03M13/255 , H03M13/45 , H04L1/0041 , H04L1/0058 , H04L1/0071 , H04L25/03184 , H04L25/03318 , H04L25/067 , H04L27/183 , H04L27/186 , H04L27/2053 , H04L27/2604
摘要： Multi-dimensional space Gray code maps for multi-dimensional phase modulation as applied to LDPC (Low Density Parity Check) coded modulation. A novel approach is provided within LDPC coded modulation communication systems that employ multi-dimensional phase modulation, using m-D (multi-dimensional) Gray code maps, to provide for improved performance when compared to communication systems employing 1-D (single-dimensional) Gray code maps. This approach can generate all possible m-D Gray code maps for a 2m-D M PSK modulation system. For example, all of the 2-D Gray code maps may be generated for a communication system using 4-D 8 PSK modulation system (where m=2, and M=8). A variety decoding processing approaches may be employed to perform LDPC coded modulation decoding of multi-dimensional space Gray code mapped signals. The slightly increased decoding complexity (when compared to decoding 1-D Gray code mapped signals) is the computation of symbol metrics and their decomposition to bit metrics.
摘要翻译：多维空间适用于LDPC（低密度奇偶校验）编码调制的多维相位调制的格雷码映射。在使用多维相位调制的LDPC编码调制通信系统中，使用mD（多维）格雷码映射提供改进的性能，与采用1维（单维）灰度的通信系统相比，提供了一种新颖的方法。代码地图。这种方法可以为2m-D M PSK调制系统生成所有可能的m-D格雷码映射。例如，可以为使用4-D 8 PSK调制系统（其中m = 2和M = 8）的通信系统生成所有2-D格雷码图。可以采用各种解码处理方法来执行多维空格格雷码映射信号的LDPC编码调制解码。解码复杂度略有提高（与解码1-D格雷码映射信号相比）是符号量度的计算及其对比特度量的分解。

23. 发明授权

US08230298B2 Overlapping sub-matrix based LDPC (low density parity check) decoder 有权
公开(公告)号：US08230298B2
公开(公告)日：2012-07-24
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： H03M13/00
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.

24. 发明授权

US08145987B2 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：US08145987B2
公开(公告)日：2012-03-27
申请号：US13006029
申请日：2011-01-13
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： G06F11/00
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”）。

25. 发明授权

US07530002B2 Sub-matrix-based implementation of LDPC (Low Density Parity Check) decoder 失效
标题翻译： LDPC（低密度奇偶校验）解码器的基于子矩阵的实现
公开(公告)号：US07530002B2
公开(公告)日：2009-05-05
申请号：US11360267
申请日：2006-02-23
申请人： Tak K. Lee , Hau Thien Tran , Ba-Zhong Shen , Kelly Brian Cameron
发明人： Tak K. Lee , Hau Thien Tran , Ba-Zhong Shen , Kelly Brian Cameron
IPC分类号： H03M13/00
CPC分类号： H03M13/116 , H03M13/1137 , H03M13/255 , H03M13/27 , H03M13/6362 , H03M13/6566
摘要： Sub-matrix-based implementation of LDPC (Low Density Parity Check) decoder. A novel approach is presented by which an LDPC coded signal is decoded by processing 1 sub-matrix at a time. A low density parity check matrix corresponding to the LDPC code includes rows and columns of sub-matrices. For example, when performing bit node processing, 1 or more sub-matrices in a column are processed; when performing check node processing, 1 or more sub-matrices in a row are processed. If desired, when performing bit node processing, the sub-matrices in each column are successively processed together (e.g., all column 1 sub-matrices, all column 2 sub-matrices, etc.). Analogously, when performing check node processing, the sub-matrices in each row can be successively processed together (e.g., all row 1 sub-matrices, all row 2 sub-matrices in row 2, etc.).
摘要翻译： LDPC（低密度奇偶校验）解码器的基于子矩阵的实现。提出了一种新颖的方法，通过该方法通过一次处理1个子矩阵对LDPC编码信号进行解码。对应于LDPC码的低密度奇偶校验矩阵包括子矩阵的行和列。例如，当执行位节点处理时，处理列中的一个或多个子矩阵; 当执行校验节点处理时，处理一行中的一个或多个子矩阵。如果需要，当执行位节点处理时，每列中的子矩阵被连续处理（例如，所有列1个子矩阵，全部2个子矩阵等）。类似地，当执行校验节点处理时，可以一起连续地处理每行中的子矩阵（例如，所有行1子矩阵，行2中的所有行2子矩阵等）。

26. 发明申请

US20080082868A1 Overlapping sub-matrix based LDPC (low density parity check) decoder 失效
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：US20080082868A1
公开(公告)日：2008-04-03
申请号：US11709078
申请日：2007-02-21
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： G06K5/04
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： 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：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。

27. 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。

28. 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。

29. 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。

30. 发明授权

US07472335B1 Symbol by symbol variable code rate capable communication device 有权
标题翻译：符号可变码率符号符号通讯装置
公开(公告)号：US07472335B1
公开(公告)日：2008-12-30
申请号：US10338185
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： H03M13/03
CPC分类号： H04L1/006 , H03M13/258 , H04L1/0009 , H04L1/0066 , H04L1/0068
摘要： Symbol by symbol variable code rate capable communication device. A communication device is operable to perform processing of a variable code rate signal whose code rate varies on a symbol by symbol basis. This may involve performing encoding of input to generate the variable code rate signal; alternatively, this may involve performing decoding of a variable code rate signal. In doing so, this approach may involve using a single encoder and/or decoder (depending on the application). In some instances, a single device is operable to encode a first variable code rate signal (for transmission to another device) and to decode a second variable code rate signal (that has been received from another device). In addition, a method of coding (including one or both of encoding and decoding) may also operate of a variable code rate signal whose code rate varies on a symbol by symbol basis.
摘要翻译：符号可变码率符号符号通讯装置。通信装置可操作以执行码率根据符号依次变化的可变码率信号的处理。这可以涉及执行输入的编码以生成可变码率信号; 或者，这可能涉及执行可变码率信号的解码。在这样做时，该方法可能涉及使用单个编码器和/或解码器（取决于应用）。在一些情况下，单个设备可操作地对第一可变码率信号（用于传输到另一设备）进行编码并对第二可变码率信号（已从另一设备接收到的信号）进行解码。此外，编码（包括编码和解码中的一个或两个）的方法也可以对码率根据符号依次变化的可变码率信号进行操作。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式