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11.发明授权Method and apparatus for decoding the output signal of a partial-response class-IV communication or recording-device channel 失效用于解码部分响应类IV通信或记录设备信道的输出信号的方法和装置
公开(公告)号：US4571734A
公开(公告)日：1986-02-18
申请号：US520666
申请日：1983-08-05
IPC分类号： H04L25/497 , H04L25/03 , H04L25/08
CPC分类号： H04L25/03184 , H04L2025/03369 , H04L25/03203
摘要： A maximum-likelihood sequence decoder is used with a partial-response signaling system for processing sequences of sampled values from a communication channel or recording device. The partial-response signals can be duobinary, dicode, or partial-response class-IV. The maximum-likelihood decoding for each sequence can be based upon a two-state trellis. Instead of two survivor metrics for two states, only a difference metric is necessary.
摘要翻译： 最大似然序列解码器与部分响应信号系统一起使用，用于处理来自通信信道或记录装置的采样值的序列。 部分响应信号可以是二进制，双向或部分响应类IV。 每个序列的最大似然解码可以基于两状态网格。 代替两个状态的两个幸存者指标，仅需要一个差异度量。
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12.发明授权Cancellation of burst noise in a communication system with application to S-CDMA 有权在应用于S-CDMA的通信系统中消除突发噪声公开(公告)号：US08411769B2
公开(公告)日：2013-04-02
申请号：US12651945
申请日：2010-01-04
CPC分类号： H04B7/216 , H04B1/71 , H04B1/7107 , H04J13/0003 , H04J13/16 , H04L25/03038 , H04L25/03343 , H04L25/49 , H04L27/3405 , H04L2025/03375 , H04L2025/03477
摘要： A communication system performs burst noise cancellation. A transmitter produces and transmits a spread signal that comprises at least one known-value symbol spread by a plurality of non data-carrying orthogonal codes and data symbols spread by at least one data-carrying orthogonal code. The transmitter transmits the spread signal across a communication link that introduces burst noise. A burst noise detector determines burst noise affected chips of the orthogonal codes. A weight computation functional block calculates a plurality of complex-valued combining weights based upon the burst noise affected chips. A vector de-spreader and a linear combiner operate in combination to use the plurality of non data-carrying orthogonal codes, the at least one data-carrying orthogonal code, and the plurality of complex-valued combining weights to de-spread the received spread signal to produce the data symbols with the burst noise substantially removed.
摘要翻译： 通信系统执行突发噪声消除。 发射机产生并发射扩展信号，该扩展信号包括由多个非数据携带正交码扩展的至少一个已知值符号和由至少一个携带数据的正交码扩展的数据符号。 发射机通过引入突发噪声的通信链路发送扩展信号。 突发噪声检测器确定正交码的突发噪声影响码片。 权重计算功能块基于突发噪声影响的码片计算多个复值组合权重。 向量解扩器和线性组合器组合操作以使用多个非数据携带正交码，所述至少一个数据携带正交码和多个复值组合权重来对接收到的扩展进行解扩展 信号以产生具有基本去除的突发噪声的数据符号。
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公开(公告)号：US08170125B2
公开(公告)日：2012-05-01
申请号：US12751490
申请日：2010-03-31
申请人： Gottfried Ungerboeck
发明人： Gottfried Ungerboeck
IPC分类号： H04L27/00
CPC分类号： H04L25/03343 , H04L25/03038 , H04L25/49 , H04L27/3405 , H04L2025/03375 , H04L2025/03477
摘要： A method for modulating a sequence of data symbols such that the transmit signal exhibits spectral redundancy. Null symbols are inserted in the sequence of data symbols such that a specified pattern of K data symbols and N−K null symbols is formed in every period of N symbols in the modulated sequence, N and K being positive integers and K being smaller than N.
摘要翻译： 一种用于调制数据符号序列使得发送信号表现出频谱冗余的方法。 在数据符号序列中插入空符号，使得在调制序列中的N个符号的每个周期中形成K个数据符号和N-K个空符号的指定模式，N和K是正整数，K小于N 。
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公开(公告)号：US07529289B2
公开(公告)日：2009-05-05
申请号：US10427593
申请日：2003-05-01
CPC分类号： H04L27/3411 , H04B1/71 , H04B1/7107 , H04B7/216 , H04L25/03038 , H04L25/03343 , H04L25/49 , H04L27/3405 , H04L2025/03375 , H04L2025/03477 , H04N7/17309 , H04N21/42676
摘要： Signal processing under attenuated transmission conditions. Within an orthogonal signal space, the number of orthogonal signals that are used to transmit information from a transmitter to a receiver is reduced and the transmitted power of each of the now remaining orthogonal signals is modified; this may involve increasing the power of all of the remaining orthogonal signals equally or alternatively modifying them individually. The same modulation used before the reduction may also be used afterwards; within communication systems having multiple transmitter-receiver paths, this will ensure that the communication system's throughput and efficiency will remain unchanged even when one (or more) transmitter-receiver paths are highly attenuated. In addition, robust mode operation is provided for ranging and registering of transmitter devices when entering the communication system. In addition, the unused orthogonal signals may be employed to support interference cancellation of those orthogonal signals that are used to transmit information.
摘要翻译： 衰减传输条件下的信号处理。 在正交信号空间内，减少了用于从发射机向接收机发送信息的正交信号的数量，并且修改了现在剩余的正交信号中的每一个的发射功率; 这可能涉及增加所有剩余的正交信号的功率，或者可以分别修改它们。 在还原之前使用的相同调制也可以随后使用; 在具有多个发射机 - 接收机路径的通信系统内，即使当一个（或多个）发射机 - 接收机路径被高度衰减时，这将确保通信系统的吞吐量和效率将保持不变。 另外，提供鲁棒模式操作，用于在进入通信系统时测距和注册发射机设备。 此外，可以采用未使用的正交信号来支持用于发送信息的那些正交信号的干扰消除。
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15.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。
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16.发明授权Cancellation of interference in a communication system with application to S-CDMA 有权消除应用于S-CDMA的通信系统中的干扰公开(公告)号：US07457352B2
公开(公告)日：2008-11-25
申请号：US11522842
申请日：2006-09-18
IPC分类号： H04B1/707
CPC分类号： H04B7/216 , H04B1/71 , H04B1/7102 , H04B1/7105 , H04B1/7107 , H04J13/0003 , H04J13/16
摘要： Cancellation of interference in a communication system with application to S-CDMA. A relatively straight-forward implemented and computationally efficient approach of selecting a predetermined number of unused codes is used to perform weighted linear combination selectively with each of the input spread signals in a multiple access communication system. If desired, the predetermined number of unused codes is always the same in each implementation. Alternatively, the predetermined number of unused codes is selected from within a reordered code matrix using knowledge that is shared between the two ends of a communication system, such as between the CMs and a CMTS. While the context of an S-CDMA communication system having CMs and a CMTS is used, the solution is generally applicable to any communication system that seeks to cancel narrowband interference. Several embodiments are also described that show the generic applicability of the solution across a wide variety of systems.
摘要翻译： 消除应用于S-CDMA的通信系统中的干扰。 使用选择预定数量的未使用代码的相对直接的实现和计算上有效的方法来在多址通信系统中与每个输入扩展信号选择性地执行加权线性组合。 如果需要，在每个实现中，预定数量的未使用代码总是相同的。 或者，使用在诸如CM和CMTS之间的通信系统的两端之间共享的知识，从重排序代码矩阵中选择预定数量的未使用代码。 虽然使用具有CM和CMTS的S-CDMA通信系统的上下文，但该解决方案通常适用于试图取消窄带干扰的任何通信系统。 还描述了几个实施例，其显示了解决方案在各种系统上的通用适用性。
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公开(公告)号：US20070009012A1
公开(公告)日：2007-01-11
申请号：US11522842
申请日：2006-09-18
IPC分类号： H04B1/00
CPC分类号： H04B7/216 , H04B1/71 , H04B1/7102 , H04B1/7105 , H04B1/7107 , H04J13/0003 , H04J13/16
摘要： Cancellation of interference in a communication system with application to S-CDMA. A relatively straight-forward implemented and computationally efficient approach of selecting a predetermined number of unused codes is used to perform weighted linear combination selectively with each of the input spread signals in a multiple access communication system. If desired, the predetermined number of unused codes is always the same in each implementation. Alternatively, the predetermined number of unused codes is selected from within a reordered code matrix using knowledge that is shared between the two ends of a communication system, such as between the CMs and a CMTS. While the context of an S-CDMA communication system having CMs and a CMTS is used, the solution is generally applicable to any communication system that seeks to cancel narrowband interference. Several embodiments are also described that show the generic applicability of the solution across a wide variety of systems.
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公开(公告)号：US07106794B2
公开(公告)日：2006-09-12
申请号：US09898850
申请日：2001-07-03
IPC分类号： H04B1/66
CPC分类号： H04L27/3405 , H03M7/40
摘要： In a communication system, Huffman coding techniques are used to obtain shaping gains for an improvement in data transmission rates. More particularly, a novel method of Huffman shaping is described that achieves a shaping gain of greater than 1 dB. The shaping gain results in a higher data rate transmission in a communication system where transmitted power is constrained.
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公开(公告)号：US20050002462A1
公开(公告)日：2005-01-06
申请号：US10909661
申请日：2004-08-02
申请人： Gottfried Ungerboeck
发明人： Gottfried Ungerboeck
CPC分类号： H04L25/03343 , H04L25/03038 , H04L25/49 , H04L27/3405 , H04L2025/03375 , H04L2025/03477
摘要： A method for modulating a sequence of data symbols such that the transmit signal exhibits spectral redundancy. Null symbols are inserted in the sequence of data symbols such that a specified pattern of K data symbols and N−K null symbols is formed in every period of N symbols in the modulated sequence, N and K being positive integers and K being smaller than N.
摘要翻译： 一种用于调制数据符号序列使得发送信号表现出频谱冗余的方法。 在数据符号序列中插入空符号，使得在调制序列中的N个符号的每个周期中形成K个数据符号和N-K个空符号的指定模式，N和K是正整数，K小于N.
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公开(公告)号：US06778611B1
公开(公告)日：2004-08-17
申请号：US09652721
申请日：2000-08-31
申请人： Gottfried Ungerboeck
发明人： Gottfried Ungerboeck
IPC分类号： H04B1500
CPC分类号： H04L25/03343 , H04L25/03038 , H04L25/49 , H04L27/3405 , H04L2025/03375 , H04L2025/03477
摘要： A method for modulating a sequence of data symbols such that the transmit signal exhibits spectral redundancy. Null symbols are inserted in the sequence of data symbols such that a specified pattern of K data symbols and N-K null symbols is formed in every period of N symbols in the modulated sequence, N and K being positive integers and K being smaller than N.
摘要翻译： 一种用于调制数据符号序列使得发送信号表现出频谱冗余的方法。 在数据符号序列中插入空符号，使得在调制序列中的N个符号的每个周期中形成K个数据符号和N-K个空符号的指定模式，N和K是正整数，K小于N.
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