公开(公告)号：US08396168B2

公开(公告)日：2013-03-12

申请号：US12760839

申请日：2010-04-15

申请人： Ali S. Khayrallah ,  Chester Park ,  Yi-Pin Eric Wang

发明人： Ali S. Khayrallah ,  Chester Park ,  Yi-Pin Eric Wang

IPC分类号： H04L27/00

CPC分类号： H04L27/38 ,  H04L25/0242 ,  H04L25/03229 ,  H04L27/3416 ,  H04L2025/03388 ,  H04L2025/03414

摘要： In a receiver with a multi-stage equalizer, such as an SLI equalizer, cumulative symbol estimates generated in one or more early stages of the equalizer are used as effective pilot symbols to improve channel estimation for later stages.

摘要翻译： 在具有多级均衡器（诸如SLI均衡器）的接收机中，在均衡器的一个或多个早期阶段中生成的累积符号估计值被用作有效的导频符号，以改进稍后阶段的信道估计。

公开(公告)号：US08385446B2

公开(公告)日：2013-02-26

申请号：US12384156

申请日：2009-04-01

申请人： Jong-Ho Lee ,  Joo-Hyun Lee ,  Sung-Hwan Kim ,  Jong-Hyeuk Lee ,  Sung-Yoon Jung ,  Chungyong Lee ,  Jaesang Ham ,  Myoung-Seok Kim

发明人： Jong-Ho Lee ,  Joo-Hyun Lee ,  Sung-Hwan Kim ,  Jong-Hyeuk Lee ,  Sung-Yoon Jung ,  Chungyong Lee ,  Jaesang Ham ,  Myoung-Seok Kim

IPC分类号： H04L5/12

CPC分类号： H04L27/2614 ,  H04L5/0007 ,  H04L25/0202 ,  H04L25/03178 ,  H04L25/0321 ,  H04L25/03229

摘要： A receiving apparatus and method of a Maximum Likelihood (ML) scheme in a Single-Carrier (SC) system are provided. The apparatus includes at least two antennas, at least two Orthogonal Frequency Division Multiplexing (OFDM) demodulators, at least two subcarrier mappers, at least two OFDM modulators, and a detector. The antennas receive signals. The OFDM demodulators convert the signals into frequency domain signals. The subcarrier mappers confirm signals mapped to frequency domain subcarriers. The OFDM modulators convert the signals into time domain signals. The detector constructs at least one set for candidate transmission symbols and detects receive signals through ML detection using the set.

公开(公告)号：US08379774B2

公开(公告)日：2013-02-19

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：US08355471B2

公开(公告)日：2013-01-15

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.

公开(公告)号：US08279916B2

公开(公告)日：2012-10-02

申请号：US12549143

申请日：2009-08-27

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：US08204160B2

公开(公告)日：2012-06-19

申请号：US12572703

申请日：2009-10-02

申请人： Gregory E. Bottomley

发明人： Gregory E. Bottomley

IPC分类号： H03D1/00

CPC分类号： H04L25/03318 ,  H04L25/03184 ,  H04L25/0321 ,  H04L25/03229 ,  H04L25/03331 ,  H04L25/067 ,  H04L2025/03401 ,  H04L2025/03414 ,  H04L2025/03426

摘要： Teachings presented herein offer reduced and stable computational complexity for symbol block detection using multi-stage assistance, and also provide for the generation of soft bit values. A demodulator generates these soft bit values by forming from a set of candidate symbol combinations, for each group of symbols in a symbol block, a subset of candidate symbol combinations for that group. The demodulator selects from the set the most likely combination, at least one combination that has a complementary bit value for a respective bit value in the most likely combination, and as many of the next most likely combinations not already selected as are needed for the size of the subset to conform to a pre-determined size. The demodulator generates soft bit values by limiting the candidate combinations of symbols considered for a symbol block according to the subsets formed for the groups of symbols in that symbol block.

摘要翻译： 本文提出的教学为使用多级协助的符号块检测提供了减少和稳定的计算复杂度，并且还提供了产生软比特值。 解调器通过从符号块中的每个符号组的一组候选符号组合形成该组的候选符号组合的子集来生成这些软比特值。 解调器从集合中选择最可能的组合，对于最可能的组合中的相应位值具有互补位值的至少一个组合，以及未被选择的许多下一个最可能的组合对于尺寸是必需的 的子集以符合预定的大小。 解调器通过根据为该符号块中的符号组形成的子集限制符号块所考虑的符号的候选组合来产生软比特值。

公开(公告)号：US08204155B2

公开(公告)日：2012-06-19

申请号：US12276834

申请日：2008-11-24

申请人： John S. Sadowsky

发明人： John S. Sadowsky

IPC分类号： H04L27/00

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：US20110051795A1

公开(公告)日：2011-03-03

申请号：US12549143

申请日：2009-08-27

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：US20110044412A1

公开(公告)日：2011-02-24

申请号：US12917248

申请日：2010-11-01

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： H04B7/10

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 (503, 506) provisionally decide each modulated signal (502, 505) separated using an inverse matrix calculation of a channel fluctuation matrix at separation section (501). Signal point reduction sections (508, 510, 514, 516) reduce candidate signal points of a multiplexed modulated signal using the provisional decision results (504, 507). Soft decision sections (512, 518) make a correct decision using the reduced candidate signal points and obtain received data (RA, RB) 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（503,506）临时确定在分离部分（501）处使用信道波动矩阵的逆矩阵计算分离的每个调制信号（502,505）。 信号点减少部分（508,510,514,516）使用临时决策结果（504,507）来减少复用的调制信号的候选信号点。 软判决部分（512,518）使用减小的候选信号点进行正确的判定，并获得每个调制信号的接收数据（RA，RB）。 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：US20090116588A1

公开(公告)日：2009-05-07

申请号：US12253536

申请日：2008-10-17

申请人： Darren Phillip MCNAMARA ,  Andrew George LILLIE

发明人： Darren Phillip MCNAMARA ,  Andrew George LILLIE

IPC分类号： H04L27/06

CPC分类号： H04L25/0204 ,  H04B7/0413 ,  H04B7/0854 ,  H04L5/0023 ,  H04L25/0228 ,  H04L25/0248 ,  H04L25/03229 ,  H04L25/03235 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03643

摘要： A lattice reduction device is described for determining a reduced lattice for a MIMO decoder. The device comprises a data processing element operable to receive matrix information and to apply one or more data processing operations on the matrix information. The device further comprises first and second parallel operation means operable in conjunction with the data processing element so that any operation carried out by said data processing element on said matrix information is directly matched by an operation carried out on respective matrix information. The data processing element is operable, on an input triangular matrix being an R component of a QR decomposition of a channel state matrix, to tend non diagonal elements of said triangular matrix towards zero on the basis of matrix column operations and to make corresponding column operations at said first and second parallel operation means. The first parallel operation means is operable on the basis of an initial matrix which is an identity matrix and said second parallel operation means is operable on the basis of an initial matrix which is said channel state matrix.

摘要翻译： 描述了一种用于确定MIMO解码器的简化格数的格点减少装置。 该装置包括可操作以接收矩阵信息并对矩阵信息应用一个或多个数据处理操作的数据处理元件。 该装置还包括与数据处理元件结合操作的第一和第二并行操作装置，使得由所述数据处理元件对所述矩阵信息执行的任何操作都通过对各个矩阵信息执行的操作进行直接匹配。 数据处理元件可操作在输入三角矩阵上，作为信道状态矩阵的QR分解的R分量，以基于矩阵列操作使所述三角矩阵的非对角线元素朝向零，并且使得相应的列操作 在所述第一和第二平行操作装置。 第一并行操作装置可以基于作为单位矩阵的初始矩阵来操作，并且所述第二并行操作装置可以基于作为所述信道状态矩阵的初始矩阵来操作。