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1. 发明申请

US20060156169A1 LDPC (Low Density Parity Check) coding and interleaving implemented in MIMO communication systems 有权
标题翻译：在MIMO通信系统中实现的LDPC（低密度奇偶校验）编码和交织
公开(公告)号：US20060156169A1
公开(公告)日：2006-07-13
申请号：US11264998
申请日：2005-11-02
申请人： Ba-Zhong Shen , Christopher Hansen , Joseph Lauer , Kelly Cameron , Tak Lee , Hau Tran
发明人： Ba-Zhong Shen , Christopher Hansen , Joseph Lauer , Kelly Cameron , Tak Lee , Hau 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. Initially, a novel approach is presented by which a wide variety of irregular LDPC codes may be generated using GRS or RS codes. These irregular LDPC codes can provide better overall performance than regular LDPC codes in terms of providing for lower BER (Bit Error Rate) as a function of SNR (Signal to Noise Ratio). A variety of communication device types are also presented that may employ the error correcting coding using a GRS-based irregular LDPC code, along with appropriately selected interleaving, to provide for even better performance. 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。最初，提出了一种新颖的方法，通过该方法可以使用GRS或RS代码生成各种不规则的LDPC码。在提供作为SNR（信噪比）的函数的较低BER（误码率）方面，这些不规则LDPC码可以提供比常规LDPC码更好的总体性能。还提出了各种通信设备类型，其可以采用基于GRS的不规则LDPC码的纠错编码以及适当选择的交织，以提供更好的性能。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，）。

2. 发明申请

US20070157062A1 Implementation of LDPC (Low Density Parity Check) decoder by sweeping through sub-matrices 失效
标题翻译：通过扫描子矩阵实现LDPC（低密度奇偶校验）解码器
公开(公告)号：US20070157062A1
公开(公告)日：2007-07-05
申请号：US11360268
申请日：2006-02-23
申请人： Tak Lee , Hau Tran , Ba-Zhong Shen , Kelly Cameron
发明人： Tak Lee , Hau Tran , Ba-Zhong Shen , Kelly 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： Implementation of LDPC (Low Density Parity Check) decoder by sweeping through sub-matrices. A novel approach is presented by which an LDPC coded signal is decoded processing the columns and rows of the individual sub-matrices of the low density parity check matrix corresponding to the LDPC code. The low density parity check matrix can partitioned into rows and columns according to each of the sub-matrices of it, and each of those sub-matrices also includes corresponding rows and columns. For example, when performing bit node processing, the same columns of at 1 or more sub-matrices can be processed together (e.g., all 1st columns in 1 or more sub-matrices, all 2nd columns in 1 or more sub-matrices, etc.). Analogously, when performing check node processing, the same rows of 1 or more sub-matrices can be processed together (e.g., all 1st rows in 1 or more sub-matrices, all 2nd rows in 1 or more sub-matrices, etc.).
摘要翻译：通过扫描子矩阵实现LDPC（低密度奇偶校验）解码器。提出了一种解码处理与LDPC码对应的低密度奇偶校验矩阵的各个子矩阵的列和行的LDPC编码信号的新方法。低密度奇偶校验矩阵可以根据它的每个子矩阵划分成行和列，并且这些子矩阵中的每一个也包括相应的行和列。例如，当执行位节点处理时，可以一起处理1个或更多个子矩阵的相同列（例如，1个或更多个子矩阵中的所有1个SUP列，全部2个SUP 1个或更多个子矩阵中的 / nd>列等）。类似地，当执行校验节点处理时，可以一起处理1个或更多个子矩阵的相同行（例如，1个或更多个子矩阵中的所有1 ^{行，全部2个 1个或多个子矩阵中的行等）。}

3. 发明申请

US20070157061A1 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：US20070157061A1
公开(公告)日：2007-07-05
申请号：US11360267
申请日：2006-02-23
申请人： Tak Lee , Hau Tran , Ba-Zhong Shen , Kelly Cameron
发明人： Tak Lee , Hau Tran , Ba-Zhong Shen , Kelly 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）。

4. 发明申请

US20050186958A1 Multiple input multiple output wireless local area network communications 失效
标题翻译：多输入多输出无线局域网通信
公开(公告)号：US20050186958A1
公开(公告)日：2005-08-25
申请号：US10933586
申请日：2004-09-03
申请人： Christopher Hansen , Jason Trachewsky , Nambirajan Seshadri , Kelly Cameron , Hau Tran , Ba-Zhong Shen
发明人： Christopher Hansen , Jason Trachewsky , Nambirajan Seshadri , Kelly Cameron , Hau Tran , Ba-Zhong Shen
IPC分类号： H04L1/06 , H04Q7/20
CPC分类号： H04L1/0625 , H04L1/0059 , H04L1/0071
摘要： A wireless local area network (WLAN) transmitter includes a MAC module, a PLCP module, and a PMD module. The Medium Access Control (MAC) module is operably coupled to convert a MAC Service Data Unit (MSDU) into a MAC Protocol Data Unit (MPDU) in accordance with a WLAN protocol. The Physical Layer Convergence Procedure (PLCP) Module is operably coupled to convert the MPDU into a PLCP Protocol Data Unit (PPDU) in accordance with the WLAN protocol. The Physical Medium Dependent (PMD) module is operably coupled to convert the PPDU into a plurality of radio frequency (RF) signals in accordance with one of a plurality of operating modes of the WLAN protocol, wherein the plurality of operating modes includes multiple input and multiple output combinations.
摘要翻译：无线局域网（WLAN）发送机包括MAC模块，PLCP模块和PMD模块。媒体访问控制（MAC）模块可操作地耦合以根据WLAN协议将MAC服务数据单元（MSDU）转换成MAC协议数据单元（MPDU）。物理层会聚过程（PLCP）模块可操作地耦合，以根据WLAN协议将MPDU转换成PLCP协议数据单元（PPDU）。物理媒体相关（PMD）模块可操作地耦合以根据WLAN协议的多种操作模式之一将PPDU转换成多个射频（RF）信号，其中多个操作模式包括多个输入和多个输出组合。

5. 发明申请

US20070127387A1 Partial-parallel implementation of LDPC (low density parity check) decoders 失效
标题翻译： LDPC（低密度奇偶校验）解码器的部分并行实现
公开(公告)号：US20070127387A1
公开(公告)日：2007-06-07
申请号：US11323901
申请日：2005-12-30
申请人： Tak Lee , Hau Tran , Ba-Zhong Shen , Kelly Cameron
发明人： Tak Lee , Hau Tran , Ba-Zhong Shen , Kelly Cameron
IPC分类号： H04J1/16
CPC分类号： H04L1/0052 , H03M13/1111 , H03M13/1137 , H03M13/114 , H03M13/255 , H03M13/27 , H04L1/0057
摘要： Partial-parallel implementation of LDPC (Low Density Parity Check) decoder. A novel approach is presented by which a selected number of cycles is performed during each of bit node processing and check node processing when performing error correction decoding of an LDPC coded signal. The number of cycles of each of bit node processing and check node processing need not be the same. At least one functional block, component, portion of hardware, or calculation can be used during both of the bit node processing and check node processing thereby conserving space with an efficient use of processing resources. At a minimum, a semi-parallel approach can be performed where 2 cycles are performed during each of bit node processing and check node processing. Alternatively, more than 2 cycles can be performed for each of bit node processing and check node processing.
摘要翻译： LDPC（低密度奇偶校验）解码器的部分并行实现。提出了一种新颖的方法，通过该方法在对LDPC编码信号执行纠错解码时，在每个位节点处理和校验节点处理期间执行所选择的周期数。每个位节点处理和校验节点处理的周期数不必相同。可以在比特节点处理和校验节点处理两者期间使用至少一个功能块，组件，硬件部分或计算，从而通过有效利用处理资源来节省空间。至少可以执行在每个位节点处理和校验节点处理期间执行2个周期的半并行方法。或者，可以对比特节点处理和校验节点处理中的每一个执行多于2个周期。

6. 发明申请

US20070033497A1 Efficient construction of LDPC (Low Density Parity Check) codes with corresponding parity check matrix having CSI (Cyclic Shifted Identity) sub-matrices 失效
公开(公告)号：US20070033497A1
公开(公告)日：2007-02-08
申请号：US11472256
申请日：2006-06-21
申请人： Ba-Zhong Shen , Tak Lee , Kelly Cameron , Hau Tran
发明人： Ba-Zhong Shen , Tak Lee , Kelly Cameron , Hau Tran
IPC分类号： H03M13/00
CPC分类号： H03M13/116 , H03M13/1151 , H03M13/1177 , H03M13/1515
摘要： Efficient construction of LDPC (Low Density Parity Check) codes with corresponding parity check matrix having CSI (Cyclic Shifted Identity) sub-matrices. These constructed LDPC codes can be implemented in multiple-input-multiple-output (MIMO) communication systems. One LDPC code construction approach uses CSI sub-matrix shift values whose shift values are checked instead of non-zero element positions within the parity check matrix (or its corresponding sub-matrices). When designing an LDPC code, this approach is efficient to find and avoid cycles (or loops) in the LDPC code's corresponding bipartite graph. Another approach involves GRS (Generalized Reed-Solomon) code based LDPC code construction. These LDPC codes can be implemented in a wide variety of communication devices, including those implemented in wireless communication systems 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)).

7. 发明申请

US20070033480A1 Efficient construction of LDPC (Low Density Parity Check) codes with corresponding parity check matrix having CSI (Cyclic Shifted Identity) sub-matrices 失效
标题翻译：具有具有CSI（循环移位标识）子矩阵的相应奇偶校验矩阵的LDPC（低密度奇偶校验）码的有效构造
公开(公告)号：US20070033480A1
公开(公告)日：2007-02-08
申请号：US11472226
申请日：2006-06-21
申请人： Tak Lee , Ba-Zhong Shen , Kelly Cameron , Hau Tran
发明人： Tak Lee , Ba-Zhong Shen , Kelly Cameron , Hau Tran
IPC分类号： H03M13/00
CPC分类号： H03M13/11
摘要： Efficient construction of LDPC (Low Density Parity Check) codes with corresponding parity check matrix having CSI (Cyclic Shifted Identity) sub-matrices. These constructed LDPC codes can be implemented in multiple-input-multiple-output (MIMO) communication systems. One LDPC code construction approach uses CSI sub-matrix shift values whose shift values are checked instead of non-zero element positions within the parity check matrix (or its corresponding sub-matrices). When designing an LDPC code, this approach is efficient to find and avoid cycles (or loops) in the LDPC code's corresponding bipartite graph. Another approach involves GRS (Generalized Reed-Solomon) code based LDPC code construction. These LDPC codes can be implemented in a wide variety of communication devices, including those implemented in wireless communication systems 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：具有具有CSI（循环移位身份）子矩阵的相应奇偶校验矩阵的LDPC（低密度奇偶校验）码的高效构造。这些构造的LDPC码可以在多输入多输出（MIMO）通信系统中实现。一种LDPC码构造方法使用CSI子矩阵移位值，其移位值被检查，而不是奇偶校验矩阵（或其对应的子矩阵）内的非零元素位置。当设计LDPC码时，该方法在LDPC码的相应二分图中找到并避免周期（或循环）是有效的。另一种方法涉及基于GRS（Generalized Reed-Solomon）代码的LDPC码构造。这些LDPC码可以在各种各样的通信设备中实现，包括在符合由IEEE 802.11n任务组（即正在努力开发的任务组）的建议实践和标准的无线通信系统中实现的通信设备 802.11 TGn（高吞吐量）标准）。

8. 发明申请

US20060156168A1 Construction of irregular LDPC (low density parity check) codes using RS (Reed-Solomon) codes or GRS (generalized Reed-Solomon) code 有权
标题翻译：使用RS（里德 - 所罗门）码或GRS（广义里德 - 所罗门）码构造不规则LDPC（低密度奇偶校验）码
公开(公告)号：US20060156168A1
公开(公告)日：2006-07-13
申请号：US11264997
申请日：2005-11-02
申请人： Ba-Zhong Shen , Kelly Cameron , Tak Lee , Hau Tran
发明人： Ba-Zhong Shen , Kelly Cameron , Tak Lee , Hau Tran
IPC分类号： H03M13/00
CPC分类号： H03M13/116 , H03M13/1148 , H03M13/255 , H03M13/6362
摘要： Construction of Irregular LDPC (Low Density Parity Check) codes using RS (Reed-Solomon) codes or GRS (Generalized Reed-Solomon) codes. A novel approach is presented by which a wide variety of irregular LDPC codes may be generated using GRS or RS codes. These irregular LDPC codes can provide better overall performance than regular LDPC codes in terms of providing for lower BER (Bit Error Rate) as a function of SNR (Signal to Noise Ratio). Such an irregular LDPC code may be appropriately designed using these principles thereby generating a code that is suitable for use in wireless communication systems including those that comply with the recommendation practices and standards being developed by the IEEE (Institute of Electrical & Electronics Engineers) 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：使用RS（里德 - 所罗门）代码或GRS（广义里德 - 所罗门）代码构建不规则LDPC（低密度奇偶校验）码。提出了一种新颖的方法，通过该方法可以使用GRS或RS代码生成各种不规则LDPC码。在提供作为SNR（信噪比）的函数的较低BER（误码率）方面，这些不规则LDPC码可以提供比常规LDPC码更好的总体性能。可以使用这些原理来适当地设计这样的不规则LDPC码，从而生成适合于无线通信系统中使用的代码，包括符合IEEE（Institute of Electrical＆Electronics Engineers）802.11n的建议实践和标准的代码任务组（即正在努力制定802.11 TGn（高吞吐量）标准的任务组）。

9. 发明申请

US20050185575A1 Asymmetrical mimo wireless communications 有权
标题翻译：不对称mimo无线通信
公开(公告)号：US20050185575A1
公开(公告)日：2005-08-25
申请号：US10979368
申请日：2004-11-01
申请人： Christopher Hansen , Jason Trachewsky , Nambirajan Seshadri , Kelly Cameron , Hau Tran , Ba-Zhong Shen
发明人： Christopher Hansen , Jason Trachewsky , Nambirajan Seshadri , Kelly Cameron , Hau Tran , Ba-Zhong Shen
IPC分类号： H04B7/04 , H04B7/06 , H04B7/08 , H04B7/216 , H04J11/00 , H04M1/00
CPC分类号： H04B7/0613 , H04B7/0413
摘要： A method for asymmetrical MIMO wireless communication begins by determining a number of transmission antennas for the asymmetrical MIMO wireless communication. The method continues by determining a number of reception antennas for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas exceeds the number of reception antennas, using spatial time block coding for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas does not exceed the number of reception antennas, using spatial multiplexing for the asymmetrical MIMO wireless communication.
摘要翻译：一种用于非对称MIMO无线通信的方法是通过确定用于非对称MIMO无线通信的多个发送天线来开始的。该方法通过确定用于非对称MIMO无线通信的接收天线的数量来继续。当发送天线的数量超过接收天线的数量时，该方法继续使用用于非对称MIMO无线通信的空间时间块编码。当发送天线的数量不超过接收天线的数量时，该方法继续使用用于非对称MIMO无线通信的空间复用。

10. 发明申请

US20050186986A1 WLAN transmitter having high data throughput 有权
标题翻译： WLAN发射机具有高数据吞吐量
公开(公告)号：US20050186986A1
公开(公告)日：2005-08-25
申请号：US10856023
申请日：2004-05-28
申请人： Christopher Hansen , Jason Trachewsky , Nambirajan Seshadri , Kelly Cameron , Hau Tran , Ba-Zhong Shen
发明人： Christopher Hansen , Jason Trachewsky , Nambirajan Seshadri , Kelly Cameron , Hau Tran , Ba-Zhong Shen
IPC分类号： H03C7/02 , H04B1/02 , H04B1/66 , H04B7/02 , H04L1/00 , H04L1/06 , H04L25/03
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。

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