公开(公告)号：US20170317786A1

公开(公告)日：2017-11-02

申请号：US15465209

申请日：2017-03-21

申请人： REALTEK SEMICONDUCTOR CORPORATION

发明人： CHUNG-YAO CHANG ,  WEI-CHIEH HUANG ,  YI-SYUN YANG

IPC分类号： H04L1/00 ,  H04L27/38

CPC分类号： H04L1/0054 ,  H04L25/03229 ,  H04L25/03961 ,  H04L25/067 ,  H04L27/38

摘要： The present disclosure includes an ML (Maximum Likelihood) detector. An embodiment of the ML detector comprises a search value selecting circuit and an ML detecting circuit. The search value selecting circuit is configured to select a search value according to a communication index and a modulation type or determine the search value according to a predetermined value, in which the communication index is related to a reception signal or a derivative thereof, the search value is associated with a search range, and a number of candidate signal value(s) in the search range is not greater than a number of all candidate signal values of the modulation type. The ML detecting circuit is configured to execute an ML calculation according to the search value and one of the reception signal and the derivative thereof, so as to calculate a log likelihood ratio of every candidate signal value in the search range.

公开(公告)号：US08611469B2

公开(公告)日：2013-12-17

申请号：US13481534

申请日：2012-05-25

申请人： John S. Sadowsky

发明人： John S. Sadowsky

IPC分类号： H04L27/28 ,  H04W88/02

CPC分类号： H04L25/03216 ,  H04L25/03222 ,  H04L25/03229 ,  H04L25/067 ,  H04L27/3488 ,  H04L27/38 ,  H04L2025/0342 ,  H04L2025/03426

摘要： In a multiple-input multiple-output (MIMO) system, multiple receive antennas produce a received signal vector, Y, which includes an element for each of the receive antennas. In an embodiment of a de-mapping method performed within a MIMO receiver, a quadrature phase shift keying (QPSK) search is performed within a search space that includes the full constellation of symbol points. Based on the results of the QPSK search, the search space is reduced to fewer than all of the quadrants, and the received signal vector data is scaled and transformed to the reduced search space. A lower-level QPSK search is performed, and the process is repeated until the modulation order is reduced to a QPSK constellation. Hard or soft decisions corresponding to the search results may then be passed to a decoder.

摘要翻译： 在多输入多输出（MIMO）系统中，多个接收天线产生接收信号向量Y，其包括用于每个接收天线的元件。 在MIMO接收机内执行解映射方法的实施例中，在包括符号点的全部星座的搜索空间内执行正交相移键控（QPSK）搜索。 基于QPSK搜索的结果，搜索空间减少到比所有象限少，并且接收的信号向量数据被缩放并变换到缩小搜索空间。 执行较低级的QPSK搜索，并且重复该处理，直到调制阶数减小到QPSK星座。 然后可以将对应于搜索结果的硬判决或软判决传递给解码器。

公开(公告)号：US08605829B2

公开(公告)日：2013-12-10

申请号：US12729414

申请日：2010-03-23

申请人： Stephen Grant ,  Gregory E. Bottomley

发明人： Stephen Grant ,  Gregory E. Bottomley

IPC分类号： H04L27/06 ,  H04B7/02

CPC分类号： H04L25/03286 ,  H04B2201/709727 ,  H04L1/0047 ,  H04L25/03178 ,  H04L25/03229 ,  H04L25/03331 ,  H04L2025/03426

摘要： Teachings presented herein offer improved symbol block detection by including a decoder unit in a demodulation system. Utilizing a decoder unit in a demodulation system can significantly enhance symbol block detection because the decoder can produce bit likelihood values (soft bit values), and these bit likelihood values can be used to construct a set of candidate symbol values. Advantageously, this set of candidate symbol values is more likely to contain the actually transmitted symbol(s) than if the decoder unit was not used in the demodulation system.

摘要翻译： 本文提出的教学通过在解调系统中包括解码器单元来提供改进的符号块检测。 在解调系统中使用解码器单元可以显着增强符号块检测，因为解码器可以产生位似然值（软比特值），并且这些比特似然值可以用于构建一组候选符号值。 有利地，与在解调系统中不使用解码器单元相比，这组候选符号值更可能包含实际发送的符号。

公开(公告)号：US20130028355A1

公开(公告)日：2013-01-31

申请号：US13644602

申请日：2012-10-04

申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUB

发明人： Ali S. Khayrallah

IPC分类号： H04L27/00

CPC分类号： H04L27/38 ,  H04L25/03229 ,  H04L27/3416 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A receiver includes a constellation processing module and a plurality of demodulation stages. The constellation processing module groups points of a constellation associated with a transmitted signal into a plurality of subsets, were at least two adjacent ones of the subsets have one or more common constellation points so that the at least two adjacent subsets overlap. The constellation processing module also determines a centroid-based value for each of the subsets of constellation points and groups the centroid-based values into one or more sets. Each of the demodulation stages except for the last demodulation stage localizes a search for a final symbol decision using the set of centroid-based values input to or selected by the demodulation stage as constellation points. The last demodulation stage determines the final symbol decision using the subset of constellation points input to or selected by the last demodulation stage.

摘要翻译： 接收机包括星座处理模块和多个解调级。 星座处理模块将与发射信号相关联的星座的点分组成多个子集，至少两个相邻子集具有一个或多个公共星座点，使得至少两个相邻子集重叠。 星座处理模块还确定每个星座点子集的基于质心的值，并将基于质心的值分组成一个或多个集合。 除了最后一个解调级之外的每个解调级使用输入到解调级或由解调级选择的基于质心的值的集合来定位对最终符号判定的搜索作为星座点。 最后一个解调阶段使用输入到或由最后一个解调阶段选择的星座点的子集来确定最终符号决定。

公开(公告)号：US20120320963A1

公开(公告)日：2012-12-20

申请号：US13595677

申请日：2012-08-27

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H04L27/01

CPC分类号： H04L25/03229 ,  H04L25/03012 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A receiver includes a constellation processing module and a plurality of equalization stages. The constellation processing module groups points of a constellation associated with a transmitted signal into a plurality of subsets. At least two adjacent ones of the subsets have one or more common constellation points so that the at least two adjacent subsets overlap. The constellation processing module also determines a centroid-based value for each of the subsets of constellation points and groups the centroid-based values into one or more sets. Each of the equalization stages except for a the last equalization stage localizes a search for a final symbol decision using the set of centroid-based values input to or selected by the equalization stage as constellation points. The last equalization stage determines the final symbol decision using the subset of constellation points input to or selected by the last equalization stage.

摘要翻译： 接收机包括星座处理模块和多个均衡级。 星座处理模块将与发射信号相关联的星座的点分组成多个子集。 至少两个相邻子集具有一个或多个公共星座点，使得至少两个相邻子集重叠。 星座处理模块还确定每个星座点子集的基于质心的值，并将基于质心的值分组成一个或多个集合。 除了最后的均衡阶段之外的每个均衡阶段使用输入到均衡阶段或由均衡阶段选择的基于质心的值集合来定位搜索最终符号决定作为星座点。 最后的均衡阶段使用输入到最后均衡阶段选择的星座点的子集来确定最终符号决定。

公开(公告)号：US20120147989A1

公开(公告)日：2012-06-14

申请号：US13399848

申请日：2012-02-17

申请人： Yutaka MURAKAMI ,  Kiyotaka Kobayashi ,  Masayuki Orihashi ,  Akihiko Matsuoka ,  Daichi Imamura ,  Rahul Malik

发明人： Yutaka MURAKAMI ,  Kiyotaka Kobayashi ,  Masayuki Orihashi ,  Akihiko Matsuoka ,  Daichi Imamura ,  Rahul Malik

IPC分类号： H04L27/00

CPC分类号： H04B7/0413 ,  H04B7/0851 ,  H04L1/0057 ,  H04L1/0071 ,  H04L1/0086 ,  H04L1/0618 ,  H04L1/1819 ,  H04L5/0023 ,  H04L25/03229 ,  H04L25/03305 ,  H04L25/03324 ,  H04L25/03891 ,  H04L27/2628 ,  H04L27/265 ,  H04L2025/03414 ,  H04L2025/03611

摘要： Soft decision sections provisionally decide each modulated signal separated using an inverse matrix calculation of a channel fluctuation matrix at separation section. Signal point reduction sections reduce candidate signal points of a multiplexed modulated signal using the provisional decision results. Soft decision sections make a correct decision using the reduced candidate signal points and obtain received data of each modulated signal. This allows received data RA, RB with a good error rate characteristic to be obtained with a relatively small number of calculations without reducing data transmission efficiency.

摘要翻译： 软判决部分使用在分离部分的信道波动矩阵的逆矩阵计算来临时决定分离的每个调制信号。 信号点减少部分使用临时判定结果来减少复用调制信号的候选信号点。 软判决部分使用缩减的候选信号点做出正确的决定，并获得每个调制信号的接收数据。 这允许以相对较少数量的计算获得具有良好错误率特性的接收数据RA，RB，而不降低数据传输效率。

公开(公告)号：US08059761B2

公开(公告)日：2011-11-15

申请号：US12170474

申请日：2008-07-10

申请人： Kiarash Amiri ,  Christopher H. Dick ,  Raghavendar Mysore Rao ,  Joseph R. Cavallaro

发明人： Kiarash Amiri ,  Christopher H. Dick ,  Raghavendar Mysore Rao ,  Joseph R. Cavallaro

IPC分类号： H04L27/06

CPC分类号： H04L25/03229 ,  H04L25/0246 ,  H04L25/03968

摘要： Circuits detect communications from multiple transmitting antennas to multiple receiving antennas. A respective first block for each non-initial transmitting antenna determines partial distances for pairings of a first candidate and a quadrature-phase amplitude. A respective second block for the initial transmitting antenna determines partial distances for combinations of phase amplitudes. A respective second block for each non-initial transmitting antenna determines partial distances for pairings of a second candidate and an in-phase amplitude. A respective first selector for each non-initial transmitting antenna selects the first candidates from the pairings for the respective second block having smaller partial distances. A respective second selector for each non-initial transmitting antenna selects the second candidates from the pairings for the respective first block having smaller partial distances. An identifier circuit selects a final candidate with a smaller partial distance from the pairings of the respective second block for the last transmitting antenna.

摘要翻译： 电路检测从多个发射天线到多个接收天线的通信。 每个非初始发射天线的相应的第一块确定用于第一候选和正交相位振幅的配对的部分距离。 用于初始发射天线的相应的第二块确定相位振幅的组合的部分距离。 每个非初始发射天线的相应的第二块确定第二候选的配对和同相幅度的部分距离。 每个非初始发射天线的相应的第一选择器从具有较小部分距离的相应第二块的配对中选择第一候选。 每个非初始发射天线的相应的第二选择器从具有较小部分距离的相应第一块的配对中选择第二候选。 标识符电路从最后发射天线的相应第二块的配对中选择具有较小部分距离的最终候选。

公开(公告)号：US20110129043A1

公开(公告)日：2011-06-02

申请号：US12729414

申请日：2010-03-23

申请人： Stephen Grant ,  Gregory E. Bottomley

发明人： Stephen Grant ,  Gregory E. Bottomley

IPC分类号： H04L27/06

CPC分类号： H04L25/03286 ,  H04B2201/709727 ,  H04L1/0047 ,  H04L25/03178 ,  H04L25/03229 ,  H04L25/03331 ,  H04L2025/03426

摘要： Teachings presented herein offer improved symbol block detection by including a decoder unit in a demodulation system. Utilizing a decoder unit in a demodulation system can significantly enhance symbol block detection because the decoder can produce bit likelihood values (soft bit values), and these bit likelihood values can be used to construct a set of candidate symbol values. Advantageously, this set of candidate symbol values is more likely to contain the actually transmitted symbol(s) than if the decoder unit was not used in the demodulation system.

摘要翻译： 本文提出的教学通过在解调系统中包括解码器单元来提供改进的符号块检测。 在解调系统中使用解码器单元可以显着增强符号块检测，因为解码器可以产生位似然值（软比特值），并且这些比特似然值可以用于构建一组候选符号值。 有利地，与在解调系统中不使用解码器单元相比，这组候选符号值更可能包含实际发送的符号。

公开(公告)号：US20110103528A1

公开(公告)日：2011-05-05

申请号：US12609466

申请日：2009-10-30

申请人： Ali Khayrallah

发明人： Ali Khayrallah

IPC分类号： H04L27/06

CPC分类号： H04L25/03229 ,  H04L25/03012 ,  H04L25/03318 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： Probability information generated by a decoder as part of the symbol decoding process is fed back for use by a multi-stage demodulator that employs serial localization with indecision so that the accuracy of the final symbol decision generated by the multi-stage demodulator is improved. The multi-stage demodulator has one or more non-final stages operable to localize a search for the final symbol decision of a received signal using centroid-based values as constellation points instead of modulation symbols associated with the received signal. A final stage of the multi-stage demodulator is operable to determine the final symbol decision using a subset of the modulation symbols as constellation points. The decoder is operable to decode the final symbol decision, including generating probability information related to the modulation symbols. The multi-stage demodulator is operable to revise the final symbol decision based on the probability information related to the modulation symbols.

摘要翻译： 由解码器生成的作为符号解码处理的一部分的概率信息被反馈供多级解调器使用，该多级解调器采用不精确的串行定位，从而提高了由多级解调器产生的最终符号判定的精度。 多级解调器具有一个或多个非最终级，其可操作用于使用基于质心的值作为星座点而不是与接收信号相关联的调制符号来定位对接收信号的最终符号判定的搜索。 多级解调器的最后阶段可操作以使用调制符号的子集作为星座点来确定最终符号判定。 解码器可操作以对最终符号判定进行解码，包括产生与调制符号有关的概率信息。 多级解调器可操作以基于与调制符号相关的概率信息修改最终符号判定。

公开(公告)号：US20110051852A1

公开(公告)日：2011-03-03

申请号：US12549157

申请日：2009-08-27

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H03D1/04 ,  H03D1/00 ,  H03D1/24 ,  H04L27/06

CPC分类号： H04B1/1081 ,  H04J11/0046 ,  H04L25/03229 ,  H04L25/0328 ,  H04L25/03299 ,  H04L25/03305 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A receiver includes a constellation processing module and a multi-stage demodulator having a plurality of non-final demodulation stages and a final demodulation stage. The constellation processing module derives a set of centroid-based values from subsets of constellation points associated with a plurality of transmitted signals for input to each of the non-final demodulation stages. Each of the non-final demodulation stages demodulates a group of signals input to the non-final demodulation stage using the set of centroid-based values as constellation points and suppresses residual interference associated with using the set of centroid-based values as constellation points for signal demodulation. The final demodulation stage demodulates a group of modified signals input to the final demodulation stage using the subset of constellation points input to the final demodulation stage to determine a final symbol decision for the plurality of transmitted signals.

摘要翻译： 接收机包括具有多个非最终解调级和最终解调级的星座处理模块和多级解调器。 星座处理模块从与多个发射信号相关联的星座点的子集中导出一组基于质心的值，以输入到每个非最终解调级。 每个非最终解调级使用基于质心的值作为星座点解调输入到非最终解调级的一组信号，并且抑制与使用基于质心的值的集合相关联的残留干扰作为星座点 信号解调。 最终解调级使用输入到最终解调级的星座点的子集来解调输入到最终解调级的一组修改信号，以确定多个发射信号的最终符号判定。