公开(公告)号：US07529289B2

公开(公告)日：2009-05-05

申请号：US10427593

申请日：2003-05-01

申请人： Bruce J. Currivan ,  Thomas J. Kolze ,  Daniel H. Howard ,  Gottfried Ungerboeck

发明人： Bruce J. Currivan ,  Thomas J. Kolze ,  Daniel H. Howard ,  Gottfried Ungerboeck

IPC分类号： H04B1/707 ,  H04B1/38 ,  H04L27/28

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。

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。

公开(公告)号：US07457352B2

公开(公告)日：2008-11-25

申请号：US11522842

申请日：2006-09-18

申请人： Bruce J. Currivan ,  Thomas J. Kolze ,  Gottfried Ungerboeck ,  Nabil R. Yousef

发明人： Bruce J. Currivan ,  Thomas J. Kolze ,  Gottfried Ungerboeck ,  Nabil R. Yousef

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。

公开(公告)号：US20070009012A1

公开(公告)日：2007-01-11

申请号：US11522842

申请日：2006-09-18

申请人： Bruce Carrivan ,  Thomas Kolze ,  Gottfried Ungerboeck ,  Nabil Yousef

发明人： Bruce Carrivan ,  Thomas Kolze ,  Gottfried Ungerboeck ,  Nabil Yousef

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.

公开(公告)号：US07106794B2

公开(公告)日：2006-09-12

申请号：US09898850

申请日：2001-07-03

申请人： Gottfried Ungerboeck ,  Arthur J. Carlson

发明人： Gottfried Ungerboeck ,  Arthur J. Carlson

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.

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

IPC分类号： H04L25/03 ,  H04L25/49 ,  H04L27/34 ,  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.

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.

公开(公告)号：US5455843A

公开(公告)日：1995-10-03

申请号：US122259

申请日：1993-09-15

申请人： Giovanni Cherubini ,  Sedat Oelcer ,  Gottfried Ungerboeck

发明人： Giovanni Cherubini ,  Sedat Oelcer ,  Gottfried Ungerboeck

IPC分类号： H04B3/14 ,  H03H7/30 ,  H03H7/40

CPC分类号： H04B3/145

摘要： Adaptive analog equalizer permitting 16 Mbit/s token ring (TR) transmission over unshielded twisted-pair (UTP) cables. The equalizer (29) is located at the wiring concentrator (25), and consists of a variable and a fixed filter section. The existing TR receiver (49) and transmitter (53) remain unchanged. To compensate for distortion introduced by the cable section (19b) preceding the equalizer, the level of the signal (B) at the equalizer output (35) is used as a control criterion. The additional distortion contributed by the cable section (21a) following the equalizer is accounted for by measuring the level of the signal (D) received from the transmitter (53) of the next TR station. By these two measurements, the equalizer is adjusted such that the cable-length dependent distortion is eliminated at the next receiver (49). Transmitted Manchester-coded signals are received essentially distortion-free for cable attenuation ranging between 0 and 25 dB at 16 MHz, corresponding to zero and maximum cable lengths between TR stations. The amplification provided by equalization at the concentrator significantly mitigates also the effect of near-end crosstalk from the transmitter into the receiver input of TR stations.

摘要翻译： 自适应模拟均衡器允许通过非屏蔽双绞线（UTP）电缆进行16 Mbit / s令牌环（TR）传输。 均衡器（29）位于配线集中器（25）处，并由变量和固定过滤器部分组成。 现有的TR接收机（49）和发射机（53）保持不变。 为了补偿由均衡器之前的电缆部分（19b）引入的失真，将均衡器输出（35）处的信号（B）的电平用作控制标准。 通过测量从下一个TR站的发射机（53）接收到的信号（D）的电平来解释由均衡器之后的电缆部分（21a）贡献的附加失真。 通过这两个测量，调整均衡器，使得在下一个接收器（49）消除电缆长度相关失真。 传输的曼彻斯特编码信号基本上是无失真的，电缆衰减范围在16MHz的0和25dB之间，对应于TR站之间的零和最大电缆长度。 在集中器处通过均衡提供的放大也显着地减轻了从发射机到TR站的接收机输入端的近端串扰的影响。

公开(公告)号：US4674103A

公开(公告)日：1987-06-16

申请号：US888295

申请日：1986-07-22

申请人： Pierre R. Chevillat ,  Dietrich G. Maiwald ,  Gottfried Ungerboeck

发明人： Pierre R. Chevillat ,  Dietrich G. Maiwald ,  Gottfried Ungerboeck

IPC分类号： H04B1/76 ,  H04B3/10 ,  H04L27/01 ,  H04L27/06 ,  H03H7/30 ,  H03K5/159

CPC分类号： H04L27/01 ,  H04L27/066

摘要： For rapidly detecting a periodic training signal in a modem receiver, delay line storage (21) is provided for a signal section which is equal to one training signal period (q.multidot.M samples) plus an additional adjacent window (q.multidot.W samples). Thus, the stored signal section includes two windows (17', 19) which are offset by one training signal period and which are similar if a training signal is present. In evaluation means (41) connected to the two windows (17', 19), two auxiliary signals (z.sub.1, z.sub.2) are generated (61, 65) which represent the signal energy and the correlation, respectively, of the samples in the two windows. From the auxiliary signals, a dissimilarity metric (z.sub.3) is derived (69) and is compared (73) to a given threshold for generating an indicator signal (CYC) which becomes active when a training signal is present, i.e. when the two window contents are similar and the metric (z.sub.3) falls below the threshold. A carrier frequency offset estimate (.DELTA..sub.f) is also derived from the second auxiliary signal (z.sub.2).

摘要翻译： 为了快速检测调制解调器接收机中的周期性训练信号，为等于一个训练信号周期（q×M个样本）加上附加的相邻窗口（q×W个样本）的信号部分提供延迟线存储器（21）。 因此，存储的信号部分包括被一个训练信号周期偏移的两个窗口（17'，19），并且如果存在训练信号则这两个相似。 在连接到两个窗口（17'，19）的评估装置（41）中，生成两个辅助信号（z1，z2），分别表示两个样本中的信号能量和相关性 视窗。 从辅助信号中，导出不同度量（z3）（69）并与（73）比较（73）给定阈值，以产生当存在训练信号时变为有效的指示信号（CYC），即当两个窗口内容 是相似的，度量（z3）低于阈值。 还从第二辅助信号（z2）导出载波频率偏移估计（DELTA f）。

公开(公告)号：US08472541B2

公开(公告)日：2013-06-25

申请号：US13118430

申请日：2011-05-29

申请人： Bruce J. Currivan ,  Thomas J. Kolze ,  Daniel H. Howard ,  Gottfried Ungerboeck

发明人： Bruce J. Currivan ,  Thomas J. Kolze ,  Daniel H. Howard ,  Gottfried Ungerboeck

IPC分类号： H04L27/28

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.