公开(公告)号：WO2011051857A2

公开(公告)日：2011-05-05

申请号：PCT/IB2010/054730

申请日：2010-10-19

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  KHAYRALLAH, Ali S.

Inventor： KHAYRALLAH, Ali S.

IPC: H04L27/34 ,  H04L27/38 ,  H04L25/03

CPC classification number: H04L25/03229 ,  H04L25/03012 ,  H04L25/03318 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: 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 multistage 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.

Abstract translation: 解码器产生的作为符号解码过程的一部分的概率信息被反馈供多级解调器使用，该多级解调器使用串行定位和优化，以使得由 多级解调器得到改进。 多级解调器具有一个或多个非最终级，其可操作以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。 多级解调器的最后一级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。 解码器可操作用于解码最终符号判定，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有关的概率信息来修改最终符号判定。

公开(公告)号：WO2011039726A3

公开(公告)日：2011-04-07

申请号：PCT/IB2010/054428

申请日：2010-09-30

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  KHAYRALLAH, Ali S.

Inventor： KHAYRALLAH, Ali S.

IPC: H04L27/34 ,  H04L27/38 ,  H04L25/03

Abstract: A constellation processing module of a receiver 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. A non-final equalization stage localizes a search for a final symbol decision using a set of the centroid-based values as constellation points. An interference suppresser suppresses residual self-interference which arises from using the set of centroid-based values as constellation points to localize the search for the final symbol decision instead of the constellation points used to modulate the transmitted signal. A final equalization stage determines the final symbol decision using a subset of the constellation points used to modulate the transmitted signal.

公开(公告)号：WO2010100076A1

公开(公告)日：2010-09-10

申请号：PCT/EP2010/052423

申请日：2010-02-25

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  DENT, Paul ,  KHAYRALLAH, Ali S.

Inventor： DENT, Paul ,  KHAYRALLAH, Ali S.

IPC: H04L27/26 ,  H04L5/00 ,  H04L25/03

CPC classification number: H04L27/2626 ,  H04L25/0202 ,  H04L25/0242 ,  H04L27/2634 ,  H04L27/2647

Abstract: A method and apparatus for configuring a variable filter in an OFDM transmitter based on the number of subcarrier frequencies selected for the input data block is described herein. An exemplary OFDM transmitter comprises a control unit, OFDM modulator, and variable filter. The control unit selects the number of subcarriers for the input data block, and configures one or more filter properties for the variable filter based on the selected number of subcarriers. The modulator, which has a size greater than the selected number of subcarriers, pads an input data block generated for the selected number of subcarriers to generate an expanded data block having a size equal to the size of the modulator, and modulates the expanded data block to generate an OFDM signal. The filter, as configured by the control unit, filters the OFDM signal.

Abstract translation: 这里描述了一种基于为输入数据块选择的子载波频率的数量来配置OFDM发射机中的可变滤波器的方法和装置。 示例性OFDM发射机包括控制单元，OFDM调制器和可变滤波器。 控制单元选择输入数据块的子载波数，并且基于所选择的子载波数量来配置可变滤波器的一个或多个滤波器特性。 具有大于所选择的子载波数量的调制器，对于所选择的子载波数量产生的输入数据块，以产生具有等于调制器大小的扩展数据块，并调制扩展数据块 以产生OFDM信号。 由控制单元配置的滤波器对OFDM信号进行滤波。

公开(公告)号：WO2004098087A3

公开(公告)日：2004-11-11

申请号：PCT/US2004/012733

申请日：2004-04-23

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  BOTTOMLEY, Gregory Edward ,  KHAYRALLAH, Ali S. ,  OLSON, Henrik ,  NILSSON, Johan

Inventor： BOTTOMLEY, Gregory Edward ,  KHAYRALLAH, Ali S. ,  OLSON, Henrik ,  NILSSON, Johan

IPC: H04B1/707

Abstract: A method for estimating a plurality of delay values in a multi-path communication signal. Correlation values are generated that correspond to a plurality of delay values associated with the multi-path communication signal. A first power-delay profile (PDP) sequence is produced from the correlation values and is used to estimate a first delay value. A first reference PDP sequence is generated based on a predefined PDP sequence and the first PDP sequence. The first reference PDP sequence is removed from the first PDP sequence so as to remove at least a portion of the contributions to the first PDP sequence from the first delay value, and to provide a second PDP sequence. A second value is estimated based on the second PDP sequence.

公开(公告)号：WO0195549A3

公开(公告)日：2002-06-06

申请号：PCT/US0116041

申请日：2001-05-18

Applicant: ERICSSON INC ,  BOTTOMLEY GREGORY EDWARD ,  DENT PAUL WILKINSON ,  KHAYRALLAH ALI S ,  ARSLAN HUSEYIN

Inventor： BOTTOMLEY GREGORY EDWARD ,  DENT PAUL WILKINSON ,  KHAYRALLAH ALI S ,  ARSLAN HUSEYIN

IPC: H03M13/27 ,  H03M13/29 ,  H03M13/45 ,  H04L1/00 ,  H04L25/03

CPC classification number: H03M13/2957 ,  H03M13/2707 ,  H03M13/2721 ,  H03M13/3905 ,  H03M13/6325 ,  H03M13/6331 ,  H04L1/005 ,  H04L1/0071 ,  H04L25/03171 ,  H04L25/03318 ,  H04L25/03337 ,  H04L25/067 ,  H04L27/22 ,  H04L27/38

Abstract: Received signals are decoded based on a coupling between bits of the received signals introduced by the channel over which the signal is transmitted or by the transmitter which transmitted the signals. For example, in a higher-order modulation scheme, such as 8-PSK, individual bits grouped in a given symbol are generally coupled rather than fully independent. Accordingly, decoding information on a first one of the bits processed through a forward error correction decoder may be used to adjust the soft information from a demodulator for one or more of the other bits contained in the same symbol for use in processing those bits through the forward error correction decoder. Particularly where interleaving is utilized, a first bit may be processed through the decoder before the soft information on another of the bits is needed, thereby allowing an intermediate decision soft value for the first bit to be used in generating the input value to the decoder for the subsequent bit. Alternatively, a multi-pass process may be utilized which may allow all of the bits to be decoded utilizing soft information from the first decoding pass to affect the input to the decoder during the second pass for coupled bits such as those transmitted in a common symbol.

Abstract translation: 接收信号基于由发送信号的信道所引入的接收信号的位之间的耦合或通过发送信号的发送器进行解码。 例如，在诸如8-PSK的更高阶调制方案中，分组在给定符号中的各个比特通常是耦合的，而不是完全独立的。 因此，可以使用通过前向纠错解码器处理的比特中的第一个比特的解码信息来从解调器调整包含在相同符号中的一个或多个其他比特的软信息，以用于通过 前向纠错解码器。 特别是在使用交织的情况下，可以在需要对另一位的软信息之前通过解码器处理第一位，从而允许将第一位的中间判定软值用于向译码器生成输入值 随后的一点。 或者，可以使用多遍处理，其可以利用来自第一解码通过的软信息来解码所有比特，以在第二遍期间影响到解码器的输入，用于耦合比特，例如以公共符号 。

公开(公告)号：WO0223742A3

公开(公告)日：2002-05-30

申请号：PCT/US0128051

申请日：2001-09-07

Applicant: ERICSSON INC ,  HUSEYIN ARSLAN ,  MOLNAR KARL JAMES ,  BOTTOMLEY GREGORY E ,  KHAYRALLAH ALI S

Inventor： HUSEYIN ARSLAN ,  MOLNAR KARL JAMES ,  BOTTOMLEY GREGORY E ,  KHAYRALLAH ALI S

IPC: H04B1/10 ,  H04L1/00 ,  H04L25/03 ,  H04B1/707

CPC classification number: H04B1/0003 ,  H04B1/1027 ,  H04B1/7105 ,  H04B2201/7071 ,  H04L1/0001 ,  H04L25/03178 ,  H04L25/03305 ,  H04L25/03331

Abstract: An adaptive radio receiver utilizes control functions derived from received signals in an interference-limited environment to decide whether to implement conventional single-user demodulation or joint demodulation. The decision to implement joint or conventional demodulation is based upon the values of estimates derived for Doppler spread, carrier-to-interference plus noise, dispersiveness and the likelihood of the presence of a dominant interferer.

Abstract translation: 自适应无线电接收机利用在受干扰限制的环境中从接收信号导出的控制功能来决定是实施传统的单用户解调还是联合解调。 实施联合或传统解调的决定基于多普勒扩展，载波干扰加噪声，色散性和存在主要干扰的可能性的估计值。

公开(公告)号：WO2012127364A1

公开(公告)日：2012-09-27

申请号：PCT/IB2012/051192

申请日：2012-03-14

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  HUI, Dennis ,  CHENG, Jung-Fu ,  GUEY, Jiann-Ching ,  KHAYRALLAH, Ali, S. ,  WONG, Shing-Wa

Inventor： HUI, Dennis ,  CHENG, Jung-Fu ,  GUEY, Jiann-Ching ,  KHAYRALLAH, Ali, S. ,  WONG, Shing-Wa

IPC: H04B7/02 ,  H03M7/30

CPC classification number: H04B7/024 ,  H03M7/3068 ,  H03M7/3082

Abstract: A compression/decompression method for backhaul communication of a complex-valued radio signal between base stations and the network processing unit, such as a Central Processor of a Coordinated Multipoint (CoMP) system, significantly reduces backhaul bandwidth. The spatial and temporal correlations of the wireless IQ signal are exploited in order to remove redundancy and substantially reduce signal bandwidth. Feature component signals of significance are extracted through linear transformation to form the radio signal, and are individually quantized, possibly at different bit rates in accordance with their relative importance. The transformation can either be pre-determined or computed in real-time based on the spatial and temporal statistics of the radio signal. In the latter case, the transformation matrix or matrices are also sent over the backhaul in order to allow the radio signal to be reconstructed at the receiving end. Different methods of generating the transformation matrices are proposed.

Abstract translation: 用于基站和诸如协调多点（CoMP）系统的中央处理器的网络处理单元之间的复数无线电信号的回程通信的压缩/解压缩方法显着地减少了回程带宽。 利用无线IQ信号的空间和时间相关性来消除冗余并显着降低信号带宽。 通过线性变换提取有意义的特征分量信号以形成无线电信号，并且可以根据其相对重要性以不同的比特率单独量化。 可以基于无线电信号的空间和时间统计来实时地进行转换或者实时地进行转换。 在后一种情况下，转换矩阵或矩阵也通过回程发送，以允许在接收端重建无线电信号。 提出了生成转换矩阵的不同方法。

公开(公告)号：WO2011024128A3

公开(公告)日：2011-05-19

申请号：PCT/IB2010053821

申请日：2010-08-25

Applicant: ERICSSON TELEFON AB L M ,  KHAYRALLAH ALI S

Inventor： KHAYRALLAH ALI S

IPC: H04L25/03 ,  H04L27/34 ,  H04L27/38

CPC classification number: H04L25/03229 ,  H04L25/03012 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: 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 int? one or more sets. Each of the equalization stages except for 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.

Abstract translation: 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。 至少两个相邻的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。星座处理模块还为每个星座点的子集确定基于质心的值，并将基于质心的值分组 诠释？ 一套或多套。 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：WO2011048548A2

公开(公告)日：2011-04-28

申请号：PCT/IB2010/054733

申请日：2010-10-19

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  KHAYRALLAH, Ali S.

Inventor： KHAYRALLAH, Ali S.

IPC: H04L25/03

CPC classification number: H04L25/03305 ,  H04L25/03184 ,  H04L25/03331 ,  H04L2025/03426

Abstract: A two-stage approach to MIMO detection improves receiver performance in a computationally tractable manner. A whitening joint detector processes a MIMO symbol stream. The whitening joint detector includes a pre-filter operative to suppress a first subset of the received MIMO streams as colored noise. The whitening joint detector further includes a primary joint detector operative to process a second subset of the MIMO streams and to output a preliminary solution obtained by minimizing a whitening joint detection metric. A secondary detector then operates in the vicinity of the primary joint detector preliminary solution. The secondary detector improves the preliminary solution by comparison to a full detection metric.

Abstract translation: MIMO检测的两阶段方法以计算容易的方式改善了接收机的性能。 美白联合检测器处理MIMO符号流。 美白联合检测器包括一个预滤波器，用于将接收到的MIMO流的第一子集抑制为有色噪声。 美白联合检测器还包括主接头检测器，其操作以处理MIMO流的第二子集，并输出通过使美白关节检测度量最小化获得的初步解。 次级检测器然后在主接头检测器初步解决方案附近操作。 二次检测器通过与完全检测度量相比较改进了初步解决方案。

公开(公告)号：WO2011021143A3

公开(公告)日：2011-04-28

申请号：PCT/IB2010053692

申请日：2010-08-16

Applicant: ERICSSON TELEFON AB L M ,  KHAYRALLAH ALI S

Inventor： KHAYRALLAH ALI S

IPC: H04L25/03

CPC classification number: H04L25/03171 ,  H04L25/03184 ,  H04L25/03203 ,  H04L25/03286 ,  H04L25/03318

Abstract: As disclosed herein, a "super receiver" structure enriches the information provided for decoding modem bits included m a received sequence of symbols, In particular, an equalizer circuit provides joint metrics to a decoder circuit w here the joint metrics, advantageously reflect joint bit probabilities. However, the metrics are computed without need for complex joint probability calculations The decoder circuit ''fuses'" the joint metrics w ith conesponding side information, which indicates the likelihood that on or more bits represented by the joint metric take on a particular value Such fusing biases the soft value estimation for the other bits represented by the joint metric, thus enabling the decoder to operate on refined soft values in its bit decoding operations.

Abstract translation: 如这里所公开的，“超接收机”结构丰富了为解码接收的符号序列中包括的调制解调器比特而提供的信息。具体地，均衡器电路在这里向联合度量提供联合度量给解码器电路w，有利地反映联合比特概率。 然而，计算度量而不需要复杂的联合概率计算。解码器电路将相关度量与相应的边信息“融合”，这表明由联合度量表示的一个或多个比特具有特定值的可能性。例如 融合对由联合度量表示的其他比特的软值估计进行偏置，从而使得解码器能够在其比特解码操作中对精化的软值进行操作。