公开(公告)号：US20180175971A1

公开(公告)日：2018-06-21

申请号：US15836162

申请日：2017-12-08

Applicant: INSTITUT MINES-TELECOM

Inventor： Asma MEJRI ,  Ghaya REKAYA BEN-OTHMAN ,  Mohammed-Achraf KHSIBA

IPC: H04L1/06 ,  H04B7/0413 ,  H04W4/00

CPC classification number: H04L1/0643 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0891 ,  H04L1/0668 ,  H04L25/03191 ,  H04L25/03961 ,  H04W4/70 ,  H04W84/045

Abstract: Embodiments of the invention provide a decoder for decoding a signal received through a transmission channel in a communication system, said signal comprising a vector of information symbols, wherein the decoder comprises: a processing unit (307) configured to determine at least one candidate set of division parameters and to perform a division of said vector of information symbols into a set of sub-vectors in association with each candidate set of division parameters, each pair of sub-vectors being associated with a division metric; a selection unit (309) configured to select one of said candidate sets of division parameters according to a selection criterion depending on said division metric; and a decoding unit (311) configured to determine at least one estimate of each sub-vector associated with said selected set of division parameters by applying a symbol estimation algorithm, wherein the decoder is configured to determine at least one estimate of the vector of information symbols from said at least one estimate of each sub-vector of information symbols.

公开(公告)号：US09941963B2

公开(公告)日：2018-04-10

申请号：US15309113

申请日：2014-05-12

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Roberto Magri ,  Enrico Forestieri ,  Marco Secondini ,  Domenico Marsella

IPC: H04B10/12 ,  H04B10/2513 ,  H04B10/2507 ,  H04B10/2531 ,  H04B10/079 ,  H04L25/03

CPC classification number: H04B10/25133 ,  H04B10/07951 ,  H04B10/07955 ,  H04B10/25073 ,  H04B10/2531 ,  H04L25/03191

Abstract: A method (10) of non-linear propagation impairment equalization, the method comprising the steps of: a. receiving (12) communications traffic carried by an optical communications signal transmitted over an optical communications link; b. generating (14) a time dependent filter representation of a nonlinear time-variant impulse response of the inverse of the optical communications link; and c. applying (16) the time dependent filter representation to the received communications traffic to form non-linear propagation impairment equalized communications traffic. An optical communications link nonlinear propagation impairment equalizer and optical communications signal receiver apparatus are also provided.

公开(公告)号：US08601357B2

公开(公告)日：2013-12-03

申请号：US13733372

申请日：2013-01-03

Applicant: Cisco Technology, Inc.

Inventor： Nebojsa Stojanovic ,  Stefan Langenbach

IPC: H03M13/03

CPC classification number: H03M13/03 ,  H04L25/03184 ,  H04L25/03191

Abstract: This invention relates to methods for obtaining a bin number of path metrics. When performing such methods, a histogram is provided, which composes a bin number of values, a maximum value and a tail region left or right of the maximum value. A bin number of path metrics is obtained from said values. According to an embodiment a local extremum is removed from said tail region. According to another embodiment the tail region is forced to be convex. According to a further embodiment a maximum metric difference between neighboring metrics is ensured.

Abstract translation: 本发明涉及获得路数量度的箱数的方法。 当执行这样的方法时，提供直方图，其构成最大值的左边或右边的值的二进制数，最大值和尾部区域。 从所述值获得二进制数的路径度量。 根据实施例，从所述尾部区域移除局部极值。 根据另一个实施例，尾部区域被迫凸起。 根据另一实施例，确保相邻度量之间的最大度量差异。

公开(公告)号：US20110305270A1

公开(公告)日：2011-12-15

申请号：US12814366

申请日：2010-06-11

Applicant: Nebojsa Stojanovic ,  Stefan Langenbach

Inventor： Nebojsa Stojanovic ,  Stefan Langenbach

IPC: H04L27/06 ,  H03H7/30

CPC classification number: H03M13/03 ,  H04L25/03184 ,  H04L25/03191

Abstract: This invention relates to methods for obtaining a bin number of path metrics. When performing such methods, a histogram is provided, which comprises a bin number of values, a maximum value and a tail region left or right of the maximum value. A bin number of path metrics is obtained from said values. According to an embodiment a local extremum is removed from said tail region. According to another embodiment the tail region is forced to be convex. According to a further embodiment a maximum metric difference between neighboring metrics is ensured.

Abstract translation: 本发明涉及获得路数量度的箱数的方法。 当执行这种方法时，提供直方图，其包括最大值的左边或右边的值的数量，最大值和尾部区域。 从所述值获得二进制数的路径度量。 根据实施例，从所述尾部区域移除局部极值。 根据另一个实施例，尾部区域被迫凸起。 根据另一实施例，确保相邻度量之间的最大度量差异。

公开(公告)号：US07864897B2

公开(公告)日：2011-01-04

申请号：US11909607

申请日：2006-03-20

Applicant: Noriyuki Maeda ,  Hiroyuki Kawai ,  Kenichi Higuchi ,  Mamoru Sawahashi

Inventor： Noriyuki Maeda ,  Hiroyuki Kawai ,  Kenichi Higuchi ,  Mamoru Sawahashi

IPC: H04L27/06 ,  H04L23/02

CPC classification number: H04B7/0413 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0246 ,  H04L25/03191 ,  H04L25/03242 ,  H04L2025/03426

Abstract: A disclosed receiver in a MIMO multiplexing communication system, in which plural signals are simultaneously transmitted from plural transmitting antenna branches using the same frequency, and the transmitted signals are retrieved by receiving signals at plural receiving antennas, separating the received signals and searching for proper symbol metrics for each branch, comprises a QR decomposer for QR decomposing the received signals to orthogonalize the transmitted signals; a symbol replica candidate ranking unit for subtracting surviving symbol replica candidates from the QR decomposed received signals to get remaining received signals and rank the remaining signals in the increasing order of expected branch metrics of the remaining received signals; a symbol replica candidate selector for selecting symbol replica candidates in the ranked order; a branch metric calculator for calculating the branch metrics of the selected symbol replica candidates; and a threshold comparator for comparing the calculated branch metrics with a predetermined threshold; wherein if a calculated branch metric is larger than the predetermined threshold, the branch metric and successive branch metrics are deleted without further searching.

Abstract translation: 在MIMO复用通信系统中公开的接收机，其中使用相同频率从多个发送天线分支同时发送多个信号，并且通过在多个接收天线处接收信号来检索所发送的信号，分离接收的信号并搜索适当的符号 每个分支的度量包括QR分解器，用于QR分解接收的信号以使发送的信号正交化; 符号复制候选排​​序单元，用于从所述QR分解的接收信号中减去剩余码元复制候选，以获得剩余的接收信号，并以剩余接收信号的预期分支度量的递增顺序对剩余信号进行排序; 用于以排序顺序选择符号复本候选者的符号复制候选选择器; 分支度量计算器，用于计算所选择的符号复本候选的分支度量; 以及阈值比较器，用于将所计算的分支度量与预定阈值进行比较; 其中如果所计算的分支度量大于所述预定阈值，则所述分支度量和连续分支度量被删除而不进一步搜索。

公开(公告)号：US07599450B2

公开(公告)日：2009-10-06

申请号：US10771813

申请日：2004-02-03

Applicant: Xueshi Yang ,  Erozan Kurtas

Inventor： Xueshi Yang ,  Erozan Kurtas

IPC: H03D1/00

CPC classification number: H04L25/03331 ,  H04L25/03191 ,  H04L25/03197

Abstract: A system for pattern dependent equalization has an equalizer bank and a detector. The equalizer bank has a plurality of equalizers, which are each tuned to a selected data pattern. The detector may be a standard sequence detector or a modified Viterbi detector, which calculates the branch metric using a pattern dependent equalized output and a pattern-dependent target. A method of decoding data uses a pattern dependent equalizer bank. The pattern dependent equalizer bank processes a segment of a bit sequence to produce an equalized pattern-dependent output for each equalizer in parallel. The detector then detects the bit sequence using the branch metric calculation to select the smallest accumulated path metric.

Abstract translation: 用于图形相关均衡的系统具有均衡器组和检测器。 均衡器组具有多个均衡器，每个均衡器被调谐到选定的数据模式。 检测器可以是标准序列检测器或修改的维特比检测器，其使用模式相关的均衡输出和与模式相关的目标来计算分支度量。 数据解码的方法使用模式相关的均衡器组。 模式相关均衡器组处理一个位序列的一个段，以平行地为每个均衡器产生均衡的模式相关输出。 然后，检测器使用分支度量计算来检测比特序列，以选择最小的累积路径度量。

公开(公告)号：US06201839B1

公开(公告)日：2001-03-13

申请号：US09055003

申请日：1998-04-03

Applicant: Aleksandar Kavcic ,  Jose M. F. Moura

Inventor： Aleksandar Kavcic ,  Jose M. F. Moura

IPC: H03D100

CPC classification number: H03M13/6343 ,  H03M13/3961 ,  H03M13/41 ,  H04L25/03191

Abstract: The present invention is directed to a method of determining branch metric values for branches of a trellis for a Viterbi-like detector. The method includes the step of selecting a branch metric function for each of the branches at a certain time index. The method also includes the step of applying the selected function to a plurality of time variant signal samples to determine the metric values.

Abstract translation: 本发明涉及一种确定用于维特比样检测器的网格分支的支路量度值的方法。 该方法包括在特定时间索引处为每个分支选择分支度量函数的步骤。 该方法还包括将所选功能应用于多个时变信号样本以确定度量值的步骤。

公开(公告)号：US09407475B2

公开(公告)日：2016-08-02

申请号：US14341869

申请日：2014-07-28

Applicant: Ceva D.S.P. Ltd.

Inventor： Zeev Kaplan ,  Noam Dvoretzki ,  Eitan Hai

IPC: H04L27/06 ,  H04L25/03 ,  H04B7/02

CPC classification number: H04L25/03242 ,  H04B7/02 ,  H04L25/03191 ,  H04L2025/03426

Abstract: A method and system for soft output multiple-input-multiple-output (MIMO) decoding may include generating a tree-graph based on: MIMO rank, number of bits per layer, and type of modulation, wherein the tree-graph comprises a root node, leaf nodes, nodes, and branches connecting the nodes; performing sphere decoding by determining a radius covering a subset of nodes within said tree-graph; managing, based on the sphere decoding, tables comprising metrics and counter metrics usable for log likelihood ratio (LLR) generation; predicting, based on a specified prediction scheme, counter metrics for paths in the tree-graph that comprise nodes and branches out of the determined radius; and updating the tables comprising the counter metrics with the predicted counter metric, in a case that the predicted counter metrics are better in maximum likelihood terms than the determined counter metrics.

Abstract translation: 用于软输出多输入多输出（MIMO）解码的方法和系统可以包括：基于MIMO秩，每层位数和调制类型生成树图，其中树图包括根 节点，叶节点，节点和连接节点的分支; 通过确定覆盖所述树形图中的节点子集的半径来执行球体解码; 基于球体解码管理包括可用于对数似然比（LLR）生成的度量和计数度量的表; 基于指定的预测方案来预测包括确定半径之外的节点和分支的树图中的路径的计数度量; 以及在所述预测计数器度量与所确定的计数器度量相比最大似然项更好的情况下，更新包括具有所述预测计数器度量的所述计数器度量的表。

公开(公告)号：US08861581B2

公开(公告)日：2014-10-14

申请号：US13079909

申请日：2011-04-05

Applicant: DoHan Kim ,  Sergey Zhidkov ,  Beom kon Kim

Inventor： DoHan Kim ,  Sergey Zhidkov ,  Beom kon Kim

IPC: H03H7/30

CPC classification number: H04L25/03057 ,  H04L1/0051 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L25/03171 ,  H04L25/03191 ,  H04L25/03235 ,  H04L25/067 ,  H04L2025/03382 ,  H04L2025/0349

Abstract: Provided is a receiver for processing VSB signal. The receiver includes a first equalizer/decoder unit and a second equalizer/decoder unit. The first equalizer/decoder unit performs a first equalizing operation, first TCM decoding and first RS decoding on a received symbol to output a first dibit. The second equalizer/decoder unit performs a second equalizing operation, second TCM decoding and second RS decoding on the received symbol to output a transport stream. The first dibit is provided as a priori information for a soft-decision operation of the second TCM decoding.

Abstract translation: 提供一种用于处理VSB信号的接收器。 接收机包括第一均衡器/解码器单元和第二均衡器/解码器单元。 第一均衡器/解码器单元对接收到的符号执行第一均衡操作，第一TCM解码和第一RS解码以输出第一二进制。 第二均衡器/解码器单元对所接收的符号执行第二均衡操作，第二TCM解码和第二RS解码以输出传输流。 提供第一个二进位作为用于第二TCM解码的软判决操作的先验信息。

公开(公告)号：US20090323795A1

公开(公告)日：2009-12-31

申请号：US12375844

申请日：2007-07-03

Applicant: Richard Stirling-Gallacher

Inventor： Richard Stirling-Gallacher

IPC: H04L25/03 ,  H04L25/08

CPC classification number: H04L25/03331 ,  H04L25/0204 ,  H04L25/03191 ,  H04L25/03292 ,  H04L25/03305 ,  H04L25/03318 ,  H04L27/2647 ,  H04L2025/03426

Abstract: An equalizing structure and method for a wireless communication system receiving device, in which two or more transmit signals transmitted in parallel from one or more transmitters are received in received signal vectors representing two or more received data streams, the signals including information modulated onto carrier signals according to a modulation scheme, all possible transmit signals being represented by candidate constellation values in the signal constellation of the modulation scheme. A processor calculates an estimate for a constellation value of a received signal and determines a number of candidate constellation values in the vicinity of the estimated constellation value in the signal constellation. A metric value calculator calculates metric values based on the received signal vectors and the product of channel estimation values with candidate signal vectors, each candidate signal vector including a candidate constellation value for each of the two or more transmit signals, wherein the metric values are calculated for each constellation value of the number of candidate constellation values and the estimated constellation value. A maximum likelihood detector detects one of the candidate signal vectors having a minimum Euclidean distance to a respective receive signal vector as a most likely transmit signal vector based on the metric values.

Abstract translation: 一种用于无线通信系统接收设备的均衡结构和方法，其中从表示两个或多个接收的数据流的接收信号向量中接收从一个或多个发射机并行发送的两个或多个发射信号，所述信号包括调制到载波信号上的信息 根据调制方案，所有可能的发射信号由调制方案的信号星座中的候选星座值表示。 处理器计算接收信号的星座值的估计，并且确定信号星座图中估计星座值附近的候选星座值的数量。 度量值计算器基于接收的信号向量和信道估计值与候选信号向量的乘积来计算度量值，每个候选信号向量包括用于两个或更多个发射信号中的每一个的候选星座值，其中度量值被计算 对于候选星座值的数量和估计的星座值的每个星座值。 最大似然检测器基于度量值检测具有到相应接收信号向量的最小欧几里德距离的候选信号向量中的一个作为最可能的发射信号向量。