公开(公告)号：US20130021178A1

公开(公告)日：2013-01-24

申请号：US13188401

申请日：2011-07-21

Applicant: Glen A. Jaquette

Inventor： Glen A. Jaquette

IPC: H03M7/40

CPC classification number: H03M7/40 ,  H03M5/145 ,  H03M7/30 ,  H03M13/1111 ,  H04B1/7115 ,  H04L1/0054 ,  H04L1/006 ,  H04L25/4925 ,  H04L27/02 ,  H04L29/0604

Abstract: Provided are a computer program product, system, method, and data structure for using variable length code tables to compress an input data stream to a compressed output data stream. A determination is made as to whether a number of at least two consecutive data units in the input data stream match the number of consecutive data units in a history buffer of previously received data units in the input data stream. If so, a copy pointer symbol is generated including data indicating a copy pointer symbol referencing previously received data units in the history buffer and indicating the determined number of consecutive data units. A determination is made of a relative displacement count in the history buffer at which the number of matching consecutive data units start. A determination is made from a variable length code table an encoding of the relative displacement count in the history buffer.

Abstract translation: 提供了一种用于使用可变长度代码表将输入数据流压缩到压缩输出数据流的计算机程序产品，系统，方法和数据结构。 确定输入数据流中的至少两个连续数据单元的数目是否与输入数据流中先前接收到的数据单元的历史缓冲器中的连续数据单元的数量相匹配。 如果是，则生成复制指针符号，包括指示在历史缓冲器中引用先前接收到的数据单元的复制指针符号的数据，并指示确定的连续数据单元的数量。 确定在匹配的连续数据单元的数量开始的历史缓冲器中的相对位移计数。 从可变长度码表中确定历史缓冲器中的相对位移计数的编码。

公开(公告)号：US08327244B1

公开(公告)日：2012-12-04

申请号：US13274943

申请日：2011-10-17

Applicant: Gregory Burd ,  Xueshi Yang

Inventor： Gregory Burd ,  Xueshi Yang

IPC: H03M13/03

CPC classification number: H03M13/251 ,  H03M13/256 ,  H04L1/0054 ,  H04L1/0058 ,  H04L1/006 ,  H04L25/03178 ,  H04L25/03197 ,  H04L25/067 ,  H04L2025/0342

Abstract: Systems and methods for processing and decoding TCM/BCM-coded signal vectors. A multi-dimensional signal vector is received by, for example, a TCM or BCM decoder. The TCM/BCM decoder identifies the closest signal points in the signal constellation set, or “nearest neighbors,” for each dimension of the received signal vector. The TCM/BCM decoder then forms a test set that includes a plurality of multi-dimensional test vectors, where each dimension of each test vector is based on an identified nearest neighbor. In particular, each test point in the test set is based on a different combination of the nearest neighbors. The TCM/BCM decoder can compute branch metrics based on only the test points in the test set, and can make detection decisions using the computed branch metrics.

Abstract translation: 用于处理和解码TCM / BCM编码信号向量的系统和方法。 多维信号矢量由例如TCM或BCM解码器接收。 TCM / BCM解码器针对接收信号向量的每个维度识别信号星座集合中最接近的信号点或最近的邻居。 然后，TCM / BCM解码器形成包括多个多维测试向量的测试集，其中每个测试向量的每个维度基于所识别的最近邻。 特别地，测试集中的每个测试点基于最近邻的不同组合。 TCM / BCM解码器可以仅基于测试集中的测试点计算分支度量，并且可以使用计算的分支度量来进行检测决策。

公开(公告)号：US08306104B2

公开(公告)日：2012-11-06

申请号：US12876807

申请日：2010-09-07

Applicant: Oscar E. Agazzi ,  John L. Creigh ,  Mehdi Hatamian ,  David E. Kruse ,  Arthur Abnous ,  Henry Samueli

Inventor： Oscar E. Agazzi ,  John L. Creigh ,  Mehdi Hatamian ,  David E. Kruse ,  Arthur Abnous ,  Henry Samueli

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H04L7/0062 ,  G01R31/3004 ,  G01R31/3008 ,  G01R31/3016 ,  G01R31/31715 ,  G01R31/318502 ,  G01R31/318552 ,  G01R31/318594 ,  H04B3/23 ,  H04B3/235 ,  H04B3/32 ,  H04L1/0021 ,  H04L1/0047 ,  H04L1/0053 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/006 ,  H04L1/242 ,  H04L7/0334 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03146 ,  H04L25/03197 ,  H04L25/03203 ,  H04L25/03235 ,  H04L25/03267 ,  H04L25/03987 ,  H04L25/067 ,  H04L25/14 ,  H04L25/4917 ,  H04L25/497 ,  H04L2001/0096 ,  H04L2025/03363 ,  H04L2025/03369 ,  H04L2025/03477 ,  H04L2025/0349 ,  H04L2025/03496 ,  H04L2025/03503 ,  H04L2025/03617 ,  H04L2025/03745

Abstract: Various systems and methods providing high speed decoding, enhanced power reduction and clock domain partitioning for a multi-pair gigabit Ethernet transceiver are disclosed. ISI compensation is partitioned into two stages; a first stage compensates ISI components induced by characteristics of a transmitter's partial response pulse shaping filter in a demodulator, a second stage compensates ISI components induced by characteristics of a multi-pair transmission channel in a Viterbi decoder. High speed decoding is accomplished by reducing the DFE depth by providing an input signal from a multiple decision feedback equalizer to the Viterbi based on a tail value and a subset of coefficient values received from a unit depth decision-feedback equalizer. Power reduction is accomplished by adaptively truncating active taps in the NEXT, FEXT and echo cancellation filters, or by disabling decoder circuitry portions, as channel response characteristics allow. A receive clock signal is generated such that it is synchronous in frequency with analog sampling clock signals and has a particular phase offset with respect to one of the sampling clock signals. This phase offset is adjusted such that system performance degradation due to coupling of switching noise from the digital sections to the analog sections is substantially minimized.

Abstract translation: 公开了为多对千兆位以太网收发器提供高速解码，增强的功率降低和时钟域划分的各种系统和方法。 ISI补偿分为两个阶段; 第一级补偿由解调器中的发射机的部分响应脉冲整形滤波器的特性引起的ISI分量，第二级补偿由维特比解码器中的多对传输信道的特性引起的ISI分量。 基于从单位深度判决反馈均衡器接收的尾值和系数值的子集，通过从多个判决反馈均衡器向维特比提供输入信号来减小DFE深度来实现高速解码。 通过自适应地截断NEXT，FEXT和回声消除滤波器中的有源抽头，或通过禁用解码器电路部分，如通道响应特性允许，实现功率降低。 生成接收时钟信号，使得其与模拟采样时钟信号在频率上同步，并且相对于采样时钟信号之一具有特定的相位偏移。 调整该相位偏移，使得由于来自数字部分到模拟部分的开关噪声的耦合而导致的系统性能降低被大大减小。

公开(公告)号：US20120272118A1

公开(公告)日：2012-10-25

申请号：US13537170

申请日：2012-06-29

Applicant: Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Brian Cameron

Inventor： Ba-Zhong Shen ,  Hau Thien Tran ,  Kelly Brian Cameron

IPC: H03M13/05 ,  G06F11/10

CPC classification number: H03M13/6561 ,  G11B20/18 ,  G11B20/1833 ,  H03M13/11 ,  H03M13/1102 ,  H03M13/1105 ,  H03M13/25 ,  H03M13/255 ,  H03M13/256 ,  H03M13/258 ,  H03M13/27 ,  H03M13/2767 ,  H03M13/2771 ,  H03M13/2785 ,  H03M13/2957 ,  H03M13/4123 ,  H03M13/4161 ,  H03M13/45 ,  H03M13/6362 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/1671 ,  H04L27/18 ,  H04L27/2602

Abstract: Variable modulation within combined LDPC (Low Density Parity Check) coding and modulation coding systems. Variable modulation encoding of LDPC coded symbols is presented. In addition, LDPC encoding, that generates an LDPC variable code rate signal, may also be performed as well. The encoding can generate an LDPC variable code rate and/or modulation signal whose code rate and/or modulation may vary as frequently as on a symbol by symbol basis. Some embodiments employ a common constellation shape for all of the symbols of the signal sequence, yet individual symbols may be mapped according different mappings of the commonly shaped constellation; such an embodiment may be viewed as generating a LDPC variable mapped signal. In general, any one or more of the code rate, constellation shape, or mapping of the individual symbols of a signal sequence may vary as frequently as on a symbol by symbol basis.

Abstract translation: 组合LDPC（低密度奇偶校验）编码和调制编码系统中的可变调制。 提出了LDPC编码符号的可变调制编码。 此外，也可以执行生成LDPC可变码率信号的LDPC编码。 该编码可以生成其码率和/或调制可以像逐个符号一样频繁地变化的LDPC可变码率和/或调制信号。 一些实施例对信号序列的所有符号采用公共星座形状，但是可以根据共同形状的星座图的不同映射来映射各个符号; 这样的实施例可以被视为生成LDPC可变映射信号。 通常，信号序列的各个符号的码率，星座形状或映射中的任何一个或多个可以像逐个符号一样频繁地变化。

公开(公告)号：US08290070B2

公开(公告)日：2012-10-16

申请号：US12323291

申请日：2008-11-25

Applicant: Lorenzo Guerrieri ,  Eleonora Guerrini ,  Daniele Veronesi ,  Paola Bisaglia

Inventor： Lorenzo Guerrieri ,  Eleonora Guerrini ,  Daniele Veronesi ,  Paola Bisaglia

IPC: H04K1/10

CPC classification number: H04L5/0046 ,  H04L1/004 ,  H04L1/006

Abstract: A method for loading bits over a set of subcarriers of a multiple-carrier communications system comprises the operation of associating with the subcarriers respective numbers of bits chosen from among a plurality of available constellations. The method envisages definition of a performance target for the system and execution of bit loading, guaranteeing the aforesaid target on a plurality of subcarriers. The performance target can be a target error rate, such as a bit-error rate (BER), or else be transferred into a constraint, such as, for example, a threshold, in a metric of log-likelihood ratios (LLRs). In this case, there is preferably envisaged application to the signals received within the multiple-carrier system a function that estimates a signal to noise ratio on each sub-carrier. The aforesaid metric of log-likelihood ratios (LLRs) is hence defined as a function of said signal to noise ratios.

Abstract translation: 一种用于在多载波通信系统的一组子载波上加载比特的方法包括与从多个可用星座中选择的相应数目的比特相关联的操作。 该方法设想定义系统的性能目标和执行比特加载，保证上述目标在多个子载波上。 性能目标可以是诸如比特误码率（BER）的目标错误率，或者以对数似然比（LLR）的度量被传送到约束，例如阈值。 在这种情况下，对于在多载波系统内接收到的信号，优选设想应用估计每个子载波上的信噪比的函数。 因此，上述对数似然比（LLR）的度量被定义为所述信噪比的函数。

公开(公告)号：US08275069B2

公开(公告)日：2012-09-25

申请号：US13043147

申请日：2011-03-08

Applicant: Yutaka Murakami ,  Kiyotaka Kobayashi ,  Masayuki Orihashi ,  Akihiko Matsuoka

Inventor： Yutaka Murakami ,  Kiyotaka Kobayashi ,  Masayuki Orihashi ,  Akihiko Matsuoka

IPC: H04L27/00 ,  H04L27/36 ,  H04L23/00 ,  H04B7/06

CPC classification number: H04L1/06 ,  H04B7/0413 ,  H04B7/0854 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/007 ,  H04L25/03305 ,  H04L25/03324 ,  H04L25/03891 ,  H04L25/061 ,  H04L27/3488 ,  H04L27/38 ,  H04L2025/03611 ,  H04N19/39

Abstract: A transmitting apparatus and method transmits different modulated signals from a plurality of antennas, and employs a configuration that includes a modulation section that obtains a modulated signal by performing signal point mapping of transmit bits using a signal point arrangement that is divided into a plurality of signal point sets on the IQ plane, whereby the minimum distance between signal points within a signal point set is smaller than the minimum signal point distance between signal point sets; and an antenna that transmits a modulated signal obtained by the modulation section. A signal point generating apparatus generates a first and second symbols to be transmitted by first and second antennas, respectively.

Abstract translation: 一种发送装置和方法从多个天线发送不同的调制信号，并且采用包括通过使用信号点布置来执行发送比特的信号点映射来获得调制信号的调制部分的配置，该信号点布置被划分为多个信号 在IQ平面上的点集合，由此信号点集合内的信号点之间的最小距离小于信号点集之间的最小信号点距离; 以及发送由调制部获得的调制信号的天线。 信号点生成装置生成分别由第一和第二天线发送的第一和第二符号。

公开(公告)号：US08270525B2

公开(公告)日：2012-09-18

申请号：US12145834

申请日：2008-06-25

Applicant: Takao Nakagawa ,  Tetsuya Yano ,  Kazuhisa Obuchi

Inventor： Takao Nakagawa ,  Tetsuya Yano ,  Kazuhisa Obuchi

IPC: H04L25/34

CPC classification number: H04L27/34 ,  H03M13/256 ,  H03M13/258 ,  H03M13/2957 ,  H03M13/2966 ,  H03M13/356 ,  H04L1/0041 ,  H04L1/006 ,  H04L1/0064 ,  H04L2001/0098

Abstract: A transmitter for use in digital radio communications systems includes: a bit corrector controls bit arrangement in such a manner that a code having high significance, out of multiple codes obtained by coding, is allocated with high priority to a bit having a tendency that the likelihood enlarges at the time of symbol decision on a receiver; a multi-level modulator allocates the code to the multiple bits in accordance with a predetermined symbol arrangement; and a symbol arrangement controller controls the symbol arrangement from equal distance arrangement to another arrangement in accordance with a ratio of the codes different in significance. To control symbol arrangement increases the effect of bit correction and improves an error rate on the receiver.

Abstract translation: 用于数字无线电通信系统的发射机包括：比特校正器以这样的方式控制比特排列，使得通过编码获得的多个码中具有高重要性的代码被高度优先地分配给具有趋势的比特 在接收者的符号决定时放大; 多级调制器根据预定的符号排列将码分配给多个比特; 并且符号排列控制器根据重要性不同的代码的比例，将符号排列从相等的距离布置控制到另一个排列。 为了控制符号排列，增加了位校正的效果，提高了接收机的误码率。

公开(公告)号：US08225170B2

公开(公告)日：2012-07-17

申请号：US13294402

申请日：2011-11-11

Applicant: Quang Nguyen

Inventor： Quang Nguyen

IPC: H03M13/00

CPC classification number: H04L1/005 ,  H04L1/0055 ,  H04L1/006

Abstract: A MIMO wireless system with Diversity processing is provided having Turbo Codes Decoders for computing orthogonal multipath signals from multiple separate antennas. The invention decodes multipath signals that have arrived at the terminal via different routes after being reflected from buildings, trees or hills. The Turbo Codes Decoder with Diversity processing increases the signal to noise ratio (SNR) more than 6 dB which enables the Wireless system to deliver data rates from up to 600 Mbit/s. A Turbo Codes Decoder block is provided to compute baseband signals from multiple different receiver paths. Several pipelined max-Log-MAP decoders are used for iterative decoding of received data. A Sliding Window of Block N data is used for pipeline operations.

Abstract translation: 提供了具有分集处理的MIMO无线系统，其具有用于从多个分离的天线计算正交多径信号的Turbo码解码器。 本发明解码了从建筑物，树木或山丘反射后，经过不同路线到达终端的多径信号。 具有分集处理的Turbo码解码器增加了超过6 dB的信噪比（SNR），使无线系统能够将数据速率从高达600 Mbit / s传输。 提供Turbo码解码器块来计算来自多个不同接收机路径的基带信号。 多个流水线max-Log-MAP解码器用于接收数据的迭代解码。 块N数据的滑动窗口用于管道操作。

公开(公告)号：US08218666B2

公开(公告)日：2012-07-10

申请号：US12615414

申请日：2009-11-10

Applicant: Jung-pil Yu ,  Hae-joo Jeong ,  Joon-soo Kim ,  Yong-sik Kwon ,  Eui-jun Park ,  Jin-hee Jeong ,  Kum-ran Ji ,  Jong-hun Kim

Inventor： Jung-pil Yu ,  Hae-joo Jeong ,  Joon-soo Kim ,  Yong-sik Kwon ,  Eui-jun Park ,  Jin-hee Jeong ,  Kum-ran Ji ,  Jong-hun Kim

IPC: H04L5/12

CPC classification number: H04L1/0041 ,  H03M13/235 ,  H03M13/256 ,  H03M13/6538 ,  H04L1/006 ,  H04L1/0071

Abstract: A method of resetting a trellis-coded modulation (TCM) encoder to a known state, the TCM encoder including a reset input that resets the TCM encoder to the known state when held at a reset level for a plurality of symbol clock cycles, the method including identifying an event to occur in the future that requires the TCM encoder to be reset to the known state; and holding the reset input of the TCM encoder at the reset level beginning the plurality of clock symbol cycles before a time the event will occur so that the TCM encoder will be reset to the known state immediately before the event occurs.

Abstract translation: 一种将网格编码调制（TCM）编码器复位到已知状态的方法，所述TCM编码器包括复位输入，所述复位输入在多个符号时钟周期保持在复位电平时将TCM编码器复位到已知状态，所述方法 包括识别将来需要将TCM编码器复位到已知状态的事件; 并且在发生事件之前将TCM编码器的复位输入保持在复位电平，开始多个时钟符号周期，使得TCM编码器将在事件发生之前立即复位到已知状态。

公开(公告)号：US08213544B2

公开(公告)日：2012-07-03

申请号：US12887394

申请日：2010-09-21

Applicant: Byoung Gill Kim ,  In Hwan Choi ,  Jin Woo Kim ,  Jong Moon Kim ,  Won Gyu Song ,  Hyoung Gon Lee ,  Kook Yeon Kwak

Inventor： Byoung Gill Kim ,  In Hwan Choi ,  Jin Woo Kim ,  Jong Moon Kim ,  Won Gyu Song ,  Hyoung Gon Lee ,  Kook Yeon Kwak

IPC: H04L27/06 ,  H04N5/44

CPC classification number: H04N21/236 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L1/0071 ,  H04L25/0232 ,  H04L25/03159 ,  H04N21/238 ,  H04N21/2389

Abstract: A digital broadcast receiver includes a tuner receiving a digital television (DTV) signal which includes a first data group including mobile service data, and the DTV signal has been processed by generating the first data group by interleaving a second data group by a DTV transmitter.

Abstract translation: 数字广播接收机包括接收数字电视（DTV）信号的调谐器，其包括包括移动业务数据的第一数据组，并且已经通过由DTV发射机交织第二数据组来产生第一数据组来处理该DTV信号。