-
71.发明授权Bandwidth efficient coded modulation scheme based on MLC (multi-level code) signals having multiple maps 有权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公开(公告)号：US07370265B2
公开(公告)日：2008-05-06
申请号：US11701155
申请日：2007-02-01
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
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。
-
73.发明授权Stopping and/or reducing oscillations in low density parity check (LDPC) decoding 有权停止和/或减少低密度奇偶校验（LDPC）解码中的振荡公开(公告)号：US07296216B2
公开(公告)日：2007-11-13
申请号：US10370136
申请日：2003-02-19
申请人： Ba-Zhong Shen , Kelly Brian Cameron
发明人： Ba-Zhong Shen , Kelly Brian Cameron
IPC分类号： G06F11/00
CPC分类号： H03M13/658 , H03M13/1108 , H03M13/1111 , H03M13/3707 , H03M13/3723 , H03M13/3738 , H03M13/3746
摘要： Stopping or reducing oscillations in Low Density Parity Check (LDPC) codes. A novel solution is presented that completely eliminates and/or substantially reduces the oscillations that are oftentimes encountered with the various iterative decoding approaches that are employed to decode LDPC coded signals. This novel approach may be implemented in any one of the following three ways. One way involves combining the Sum-Product (SP) soft decision decoding approach with the Bit-Flip (BF) hard decision decoding approach in an intelligent manner that may adaptively select the number of iterations performed during the SP soft decoding process. The other two ways involve modification of the manner in which the SP soft decoding approach and the BF hard decision decoding approach are implemented. One modification involves changing the initialization of the SP soft decoding process, and another modification involves the updating procedure employed during the SP soft decoding approach process.
摘要翻译： 停止或减少低密度奇偶校验（LDPC）码中的振荡。 提出了一种新颖的解决方案，其完全消除和/或基本上减少了用于解码LDPC编码信号的各种迭代解码方法经常遇到的振荡。 这种新颖的方法可以以以下三种方式中的任何一种来实现。 一种方式是将Sum-Product（SP）软判决解码方法与智能方式的Bit-Flip（BF）硬判决解码方法相结合，可以自适应地选择在SP软解码过程中执行的迭代次数。 另外两种方式涉及SP软解码方法和BF硬判决解码方式的实现方式的修改。 一个修改涉及改变SP软解码过程的初始化，另一个修改涉及在SP软解码过程中采用的更新过程。
-
74.发明授权Bandwidth efficient coded modulation scheme based on MLC (multi-level code) signals having multiple maps 有权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公开(公告)号：US07197690B2
公开(公告)日：2007-03-27
申请号：US11017087
申请日：2004-12-20
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
-
75.发明授权Low density parity check (LDPC) code decoder using min*, min**, max* or max** and their respective inverses 有权使用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公开(公告)号：US07107511B2
公开(公告)日：2006-09-12
申请号：US10369168
申请日：2003-02-19
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。
-
76.发明授权Metric calculation design for variable code rate decoding of broadband trellis, TCM, or TTCM 失效宽带网格，TCM或TTCM的可变码率解码的度量计算设计公开(公告)号：US07065695B2
公开(公告)日：2006-06-20
申请号：US10264647
申请日：2002-10-04
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：US20120288024A1
公开(公告)日：2012-11-15
申请号：US13558985
申请日：2012-07-26
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： H04B7/06
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。
-
78.发明授权Algebraic construction of LDPC (low density parity check) codes with corresponding parity check matrix having CSI (cyclic shifted identity) sub-matrices 有权具有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）码的代数构造公开(公告)号：US08176380B2
公开(公告)日：2012-05-08
申请号：US12614124
申请日：2009-11-06
IPC分类号： H03M13/00
CPC分类号： H03M13/6362 , H03M13/1148 , H03M13/1151 , H03M13/116 , H03M13/1174 , H03M13/1177 , H03M13/1185 , H03M13/1188 , H03M13/1515 , H03M13/255
摘要： Algebraic method to construct LDPC (Low Density Parity Check) codes with parity check matrix having CSI (Cyclic Shifted Identity) sub-matrices. A novel approach is presented by which identity sub-matrices undergo cyclic shifting, thereby generating CSI sub-matrices that are arranged forming a parity check matrix of an LDPC code. The parity check matrix of the LDPC code may correspond to a regular LDPC code, or the parity check matrix of the LDPC code may undergo further modification to transform it to that of an irregular LDPC code. The parity check matrix of the LDPC code may be partitioned into 2 sub-matrices such that one of these 2 sub-matrices is transformed to be a block dual diagonal matrix; the other of these 2 sub-matrices may be modified using a variety of means, including the density evolution approach, to ensure the desired bit and check degrees of the irregular LDPC code.
摘要翻译： 使用具有CSI（循环移位身份）子矩阵的奇偶校验矩阵构造LDPC（低密度奇偶校验）码的代数方法。 提出了一种新颖的方法，其中身份子矩阵经历循环移位，从而产生排列形成LDPC码的奇偶校验矩阵的CSI子矩阵。 LDPC码的奇偶校验矩阵可以对应于常规LDPC码，或者LDPC码的奇偶校验矩阵可以经历进一步修改，以将其转换为不规则LDPC码的奇偶校验矩阵。 LDPC码的奇偶校验矩阵可以被划分为2个子矩阵，使得这2个子矩阵中的一个被变换为块双对角矩阵; 这两个子矩阵中的另一个可以使用包括密度演化方法的各种手段进行修改，以确保不规则LDPC码的期望比特和校正度。
-
79.发明授权LDPC (low density parity check) coded signal decoding using parallel and simultaneous bit node and check node processing 有权LDPC（低密度奇偶校验）编码信号解码使用并行和同时的比特节点和校验节点处理公开(公告)号：US07958428B2
公开(公告)日：2011-06-07
申请号：US11846761
申请日：2007-08-29
IPC分类号： H03M13/00
CPC分类号： H03M13/1137 , H04L1/005 , H04L1/0057
摘要： LDPC (Low Density Parity Check) coded signal decoding using parallel and simultaneous bit node and check node processing. This novel approach to decoding of LDPC coded signals may be described as being LDPC bit-check parallel decoding. In some alternative embodiment, the approach to decoding LDPC coded signals may be modified to LDPC symbol-check parallel decoding or LDPC hybrid-check parallel decoding. A novel approach is presented by which the edge messages with respect to the bit nodes and the edge messages with respect to the check nodes may be updated simultaneously and in parallel to one another. Appropriately constructed executing orders direct the sequence of simultaneous operation of updating the edge messages at both nodes types (e.g., edge and check). For various types of LDPC coded signals, including parallel-block LDPC coded signals, this approach can perform decoding processing in almost half of the time as provided by previous decoding approaches.
摘要翻译： LDPC（低密度奇偶校验）编码信号解码使用并行和同时的比特节点和校验节点处理。 这种LDPC编码信号的解码方法可以被描述为LDPC比特检验并行解码。 在一些替代实施例中，解码LDPC编码信号的方法可以被修改为LDPC符号校验并行解码或LDPC混合校验并行解码。 提出了一种新颖的方法，通过该方法可以相对于校验节点相对于比特节点和边缘消息的边缘消息可以同时并且彼此并行地更新。 适当构造的执行命令指示在两种节点类型（例如，边缘和检查）上更新边缘消息的同时操作的顺序。 对于包括并行块LDPC编码信号的各种类型的LDPC编码信号，该方法可以在几乎一半的时间内执行由先前的解码方法提供的解码处理。
-
公开(公告)号：US07746886B2
公开(公告)日：2010-06-29
申请号：US10979368
申请日：2004-11-01
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： H04W76/00
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。
-
-
-
-
-
-
-
-
-
搜索结果
117 条记录 (耗时 0.042 秒)
