公开(公告)号：US5309476A

公开(公告)日：1994-05-03

申请号：US766881

申请日：1991-09-26

申请人： Jack T. Murray ,  Gottfried Ungerboeck ,  Malcolm S. Ware

发明人： Jack T. Murray ,  Gottfried Ungerboeck ,  Malcolm S. Ware

IPC分类号： H04L27/00 ,  H04L27/22 ,  H04L5/16

CPC分类号： H04L27/0012

摘要： Method and apparatus for determining occurrence of an S1 modem identification sequence is disclosed. An S1 sequence is found to exist when the sum of conjugate complex multiplication of signal sample amplitudes taken at an interval T/2 result in a negative scalar value for an arbitrary number of sequential occurrences. Complex samples taken from incoming baseband waveform at twice the modulation rate are interleaved in pairs of two with two even numbered samples and two odd numbered samples being considered separately by first performing complex multiplication followed by scalar multiplication of an output of the complex multiplication and an output of the previous complex multiplication delayed by one modulation interval T. The separate results from the sets of pairs of signal samples are summed to form a scalar whose value when consistently less than 0 indicates the presence of an S1 modem identification sequence in accordance with the CCITT S1 recommendation.

摘要翻译： 公开了一种用于确定S1调制解调器识别序列的发生的方法和装置。 当以间隔T / 2获取的信号样本幅度的共轭复数乘法的和导致任意数量的连续出现的负标量值时，发现S1序列存在。 以两倍于调制速率的入局基带波形采集的复杂样本以两个偶数编号的采样成对进行交织，并且通过首先执行复乘乘以复乘乘法的输出的标量乘法和输出 前一个复数乘法延迟一个调制间隔T.来自信号样本对组的单独结果相加以形成一个标量，其值一直小于0表示存在根据CCITT的S1调制解调器识别序列 S1推荐。

公开(公告)号：US08503540B2

公开(公告)日：2013-08-06

申请号：US13620468

申请日：2012-09-14

申请人： Lin He ,  Thomas J. Kolze ,  Ba-Zhong Shen ,  Gottfried Ungerboeck ,  Bruce J. Currivan

发明人： Lin He ,  Thomas J. Kolze ,  Ba-Zhong Shen ,  Gottfried Ungerboeck ,  Bruce J. Currivan

IPC分类号： H04N7/12 ,  H04N11/02

CPC分类号： H04L27/3416 ,  H03M13/253 ,  H04L1/0057 ,  H04L1/0065 ,  H04L27/36

摘要： A method and apparatus is disclosed to map a sequence of data to Quadrature Amplitude Modulation (QAM) constellation symbols. The method and apparatus encodes only a portion of the sequence of data and leaves a remaining portion of the sequence of data unencoded. The encoded portion of the sequence of data and the remaining unencoded portion of the sequence of data are then mapped into modulation symbols of the QAM constellation. The encoded portion of the sequence of data selects subsets of the QAM constellation, and the remaining unencoded portion of the sequence of data determines a specific modulation symbol within each subset of the QAM constellation.

摘要翻译： 公开了一种将数据序列映射到正交幅度调制（QAM）星座符号的方法和装置。 该方法和装置仅对该数据序列的一部分进行编码，并留下未被编码的数据序列的剩余部分。 然后将数据序列的编码部分和数据序列的剩余未编码部分映射到QAM星座图的调制符号中。 数据序列的编码部分选择QAM星座的子集，并且数据序列的剩余未编码部分确定QAM星座图的每个子集内的特定调制符号。

公开(公告)号：US08437366B2

公开(公告)日：2013-05-07

申请号：US13099760

申请日：2011-05-03

申请人： Gottfried Ungerboeck ,  Scott Powell

发明人： Gottfried Ungerboeck ,  Scott Powell

IPC分类号： H04J3/00 ,  H04L12/26

CPC分类号： H04L41/08 ,  H04L12/403

摘要： Certain aspects for the start-up procedure of transceivers supporting higher data rates over twisted-pair copper cabling are provided for 10 Gbit/sec Ethernet links (10GBASE-T). During a PMA (physical medium attachment) training period of the start-up procedure, long PMA training frames are exchanged periodically between link partners. A significant portion of each PMA training frame consists of known pseudo random sequences simultaneously transmitted over four wire pairs. PMA training frames include an InfoField for exchanging parameters and control information between link partners. For example, the InfoField's payload comprises fields for indicating current transmit power backoff (PBO), next PBO, requested PBO, transition count, control information, and for communicating precoder coefficients. Information in InfoFields is repeated and is not necessary that a link partner decodes every InfoField. For example, by occasionally reading the transition count, a link partner can determine when a change in transmit PBO and/or a state transition is to occur.

摘要翻译： 为10Gbit /秒以太网链路（10GBASE-T）提供了通过双绞铜缆布线支持更高数据速率的收发器的启动过程的某些方面。 在启动程序的PMA（物理介质附加）训练期间，长链PMA训练帧在链路伙伴之间定期交换。 每个PMA训练帧的重要部分由通过四个线对同时传输的已知伪随机序列组成。 PMA培训框架包括用于在链接伙伴之间交换参数和控制信息的InfoField。 例如，InfoField的有效载荷包括用于指示当前发送功率回退（PBO），下一个PBO，所请求的PBO，转移计数，控制信息以及用于传达预编码器系数的字段。 InfoFields中的信息被重复，链接伙伴不需要对每个InfoField进行解码。 例如，通过偶尔读取转换计数，链路伙伴可以确定何时发生传输PBO和/或状态转换的变化。

公开(公告)号：US07460595B2

公开(公告)日：2008-12-02

申请号：US11188301

申请日：2005-07-25

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.

摘要翻译： 在通信系统中，使用霍夫曼编码技术获得整形增益以提高数据传输速率。 更具体地，描述了一种实现霍夫曼整形的新方法，其实现了大于1dB的整形增益。 整形增益导致传输功率受限的通信系统中的较高数据速率传输。

公开(公告)号：US07457364B2

公开(公告)日：2008-11-25

申请号：US10909661

申请日：2004-08-02

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.

公开(公告)号：US20050141460A9

公开(公告)日：2005-06-30

申请号：US10142189

申请日：2002-05-08

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

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

IPC分类号： H04B1/707 ,  H04B7/216 ,  H04J13/00 ,  H04J13/16

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 are 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简单的实现和计算上有效的方法来在多址通信系统中选择性地与每个输入扩展信号执行加权线性组合。 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：US5132963A

公开(公告)日：1992-07-21

申请号：US522333

申请日：1990-05-11

申请人： Gottfried Ungerboeck

发明人： Gottfried Ungerboeck

IPC分类号： H04B3/23

CPC分类号： H04B3/23 ,  H04B3/237 ,  H04B3/238

摘要： In the echo-cancelling device of the invention new decision-error directed algorithms are developed which permit to maintain adaptivity of the echo coefficients and perform precise tracking of the far-end echo phase in a computationally efficent manner during full-duplex operation. The echo-cancelling device comprises an adjust device (40) performing the minimization of the mean-square error obtained as the difference between the signal at the output of the equalizer (Z) and the data-symbol decision (a), for providing the adjustment of the near echo estimator (20) coefficients, of the far echo estimator (22) coefficients, and of the phase (26) of the estimated far echo.

公开(公告)号：US4615004A

公开(公告)日：1986-09-30

申请号：US681047

申请日：1984-12-13

申请人： Pierre R. Chevillat ,  Hans P. Kaeser ,  Dietrich G. U. Maiwald ,  Gottfried Ungerboeck

发明人： Pierre R. Chevillat ,  Hans P. Kaeser ,  Dietrich G. U. Maiwald ,  Gottfried Ungerboeck

IPC分类号： G06F9/30 ,  G06F7/00 ,  G06F9/315 ,  G06F15/78 ,  G06F17/10 ,  G06F13/00

CPC分类号： G06F9/30032 ,  G06F15/786

摘要： A microprocessor having a single common data bus (17) to which the output (33) of the arithmetic-logic unit (11) as well as input and output of the data memory (13) are connected without intermediate buffer registers. Of the working registers (21, 23, 25, 27) connected to the ALU inputs, one group (21, 23) is loaded from the common data bus and the other group (25, 27), used as accumulators, is directly loaded from the ALU output. Specific control circuitry (51, 53, 55, 57, 59, 61) allows selective storing of ALU output values into accumulators (25, 27), and simultaneous transfer with selective scaling into another register and into an addressed memory location within the same cycle during which the instruction was executed.

摘要翻译： 具有单个公共数据总线（17）的微处理器，算术逻辑单元（11）的输出（33）以及数据存储器（13）的输入和输出连接到其上，而没有中间缓冲寄存器。 在连接到ALU输入的工作寄存器（21,23,25,27）中，从公共数据总线加载一组（21,23），并且用作累加器的另一组（25,27）被直接加载 从ALU输出。 特定控制电路（51,53,55,57,59,61）允许将ALU输出值选择性地存储到累加器（25,27）中，并且通过选择性缩放同时传送到另一个寄存器并在同一周期内的寻址存储器位置 执行指令期间。

公开(公告)号：US4571734A

公开(公告)日：1986-02-18

申请号：US520666

申请日：1983-08-05

申请人： Francois B. Dolivo ,  Gottfried Ungerboeck ,  Thomas D. Howell

发明人： Francois B. Dolivo ,  Gottfried Ungerboeck ,  Thomas D. Howell

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。

公开(公告)号：US08411769B2

公开(公告)日：2013-04-02

申请号：US12651945

申请日：2010-01-04

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

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

IPC分类号： H04L27/28 ,  H04B1/10

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。