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1. 发明申请

WO2011001399A2 INTERFERENCE CANCELLATION IN A MULTI-USER RECEIVER 审中-公开
标题翻译：多用户接收器中的干扰消除
公开(公告)号：WO2011001399A2
公开(公告)日：2011-01-06
申请号：PCT/IB2010/053009
申请日：2010-06-30
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali S. , BJÖRKEGREN, Håkan
发明人： KHAYRALLAH, Ali S. , BJÖRKEGREN, Håkan
IPC分类号： H04B1/707
CPC分类号： H04B1/71072 , H04B2201/70714
摘要： The delay associated with performing interference cancellation in a multi-user receiver is reduced by enabling partial decoding. According Io an embodiment, interference is canceled from a received signal having signal contributions from multiple users by partially decoding a first codeword obtained from the received signal and transmitted by a first user via a first signal The first signal ts reconstructed based on the partial decoding of the first codeword and canceled from the received signal to yield a reduced-interference signal. A second codeword obtained from the reduced- interference signal and transmitted by the first user or a second user via a second signal is at least partially decoded. In one embodiment, the first codeword is partially decoded by puncturing one or more coded bits of the first codeword and decoding the first codeword based on the one or more punctured coded bits and estimates of the remaining coded bits.
摘要翻译：通过启用部分解码来减少与多用户接收机中的干扰消除相关联的延迟。根据实施例，通过部分地解码从接收信号获得的并由第一用户经由第一信号发送的第一码字，从具有来自多个用户的信号贡献的接收信号中消除干扰。基于部分解码的第一信号ts 第一码字并从接收信号中消除以产生减小干扰信号。从减少的干扰信号获得并由第一用户或第二用户经由第二信号发送的第二码字被至少部分解码。在一个实施例中，通过对第一码字的一个或多个编码比特进行删截并基于一个或多个穿孔编码比特和剩余编码比特的估计来对第一码字进行解码来对第一码字进行部分解码。

2. 发明申请

WO2011051857A2 METHOD AND APPARATUS FOR MERGING BIT PROBABILITY INFORMATION IN SERIAL LOCALIZATION WITH INDECISION 审中-公开
标题翻译：在带有指数的串行局部化中合并位概率信息的方法和设备
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
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali S.
发明人： KHAYRALLAH, Ali S.
IPC分类号： H04L27/34 , H04L27/38 , H04L25/03
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 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.
摘要翻译：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。

3. 发明申请

WO2011039726A3 EQUALIZATION AND RESIDUAL SELF-INTERFERENCE SUPPRESSION USING SERIAL LOCALIZATION WITH INDECISION 审中-公开
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
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali S.
发明人： KHAYRALLAH, Ali S.
IPC分类号： H04L27/34 , H04L27/38 , H04L25/03
摘要： 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.

4. 发明申请

WO2010100076A1 OFDM SPECTRAL CONTROL 审中-公开
标题翻译： OFDM频谱控制
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
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , DENT, Paul , KHAYRALLAH, Ali S.
发明人： DENT, Paul , KHAYRALLAH, Ali S.
IPC分类号： H04L27/26 , H04L5/00 , H04L25/03
CPC分类号： H04L27/2626 , H04L25/0202 , H04L25/0242 , H04L27/2634 , H04L27/2647
摘要： 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.
摘要翻译：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。

5. 发明申请

WO2012098490A3 STALE FEEDBACK USING A SECONDARY BASE STATION 审中-公开
公开(公告)号：WO2012098490A3
公开(公告)日：2012-07-26
申请号：PCT/IB2012/050198
申请日：2012-01-16
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali S.
发明人： KHAYRALLAH, Ali S.
IPC分类号： H04B7/04
摘要： A system (25) and method (52) in which two base stations— a. Primary Base Station, PBS, (34) and a Secondary Base Station, SBS, (36)— -are used to accomplish a Virtual 2-antemia Receiver, V2RX, scheme, 'fhe PBS may perform the initial transmissions of symbols, but, instead of the PBS, the SBS may handle the subsequent reception of terminal -specific Channel State Information, CSI, and the broadcast of an additional signal. The SBS can be much simpler in design than the PBS, and. can be located physically closer to the terminals (28, 29), requiring less power for the feedback signals.from the terminals and also for the SBS's own broadcast of the additional signal to the terminals. The reception and usage of stale CSI using a secondary base station can be important for dense networks with a large number of simple terminals.

6. 发明申请

WO2011042870A2 METHOD AND APPARATUS FOR EQUALIZATION OF RECEIVED SIGNALS 审中-公开
标题翻译：用于均衡接收信号的方法和装置
公开(公告)号：WO2011042870A2
公开(公告)日：2011-04-14
申请号：PCT/IB2010/054511
申请日：2010-10-06
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali S.
发明人： KHAYRALLAH, Ali S.
CPC分类号： H04L25/03318 , H04L25/03184 , H04L2025/03388
摘要： A receiver for a mobile communication device comprises an primary detector for generating an initial sequence estimate comprising a plurality of initial symbol estimates from a received symbol sequence corrupted by intersymbol interference, and a secondary detector to receive said initial sequence estimate and to output a final sequence estimate comprising a plurality of final symbol estimates. The secondary detector comprises a sequence generator configured to generate one or more revised sequence estimates by replacing at least one initial symbol estimate m said initial sequence estimate with a corresponding nearest neighbor symbol in each of said revised symbol estimates; an error calculator to compute error metrics for said revised sequence estimates; and a selection circuit to compare error metrics for said initial and revised sequence estimates and to output one of said initial or revised sequence estimates as said final sequence estimate based on said error metrics.
摘要翻译：一种用于移动通信设备的接收机包括：主检测器，用于产生包含由符号间干扰损坏的接收符号序列的多个初始符号估计的初始序列估计;以及辅助检测器，用于接收所述初始序列估计并输出最终序列估计包括多个最终符号估计。次级检测器包括：序列发生器，被配置为通过用所述修改的符号估计中的每一个中的对应的最近邻符号替换所述初始序列估计中的至少一个初始符号估计来生成一个或多个修订的序列估计; 误差计算器，用于计算所述经修订的序列估计的误差度量; 以及选择电路，用于比较所述初始和修订的序列估计的误差度量，并且基于所述误差度量将所述初始或修正的序列估计中的一个输出为所述最终序列估计。

7. 发明申请

WO2011024127A2 DEMODULATION USING SERIAL LOCALIZATION WITH INDECISION 审中-公开
标题翻译：使用序列本地化和指数进行解调
公开(公告)号：WO2011024127A2
公开(公告)日：2011-03-03
申请号：PCT/IB2010/053820
申请日：2010-08-25
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali S.
发明人： KHAYRALLAH, Ali S.
IPC分类号： H04L27/38
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-hased 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-hased 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：接收器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。星座处理模块还为星座点的每个子集确定基于质心的值，并将具有质心的值分组为一个或多个集合。除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质心相关值集合作为星座点来定位对最终符号判定的搜索。最后的解调级使用输入到最后一个解调级或由最后的解调级选择的星座点的子集来确定最终的符号判定。

8. 发明申请

WO2011048548A2 METHOD FOR POST DETECTION IMPROVEMENT IN MIMO 审中-公开
标题翻译： MIMO中检测改进的方法
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
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali S.
发明人： KHAYRALLAH, Ali S.
IPC分类号： H04L25/03
CPC分类号： H04L25/03305 , H04L25/03184 , H04L25/03331 , H04L2025/03426
摘要： 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.
摘要翻译： 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。

9. 发明申请

WO2011024128A2 EQUALIZATION USING SERIAL LOCALIZATION WITH INDECISION 审中-公开
标题翻译：利用序列局部化和指数平衡
公开(公告)号：WO2011024128A2
公开(公告)日：2011-03-03
申请号：PCT/IB2010/053821
申请日：2010-08-25
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali S.
发明人： KHAYRALLAH, Ali S.
IPC分类号： H04L25/03
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 intυ 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：接收器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成多个子集。至少两个相邻子集具有一个或多个共同星座点，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子集确定基于质心的值，并将基于质心的值在一个或多个集合中。除了最后的均衡级以外的每个均衡级使用输入到均衡级或由均衡级选择的基于质心的值集合作为星座点来定位对最终符号判定的搜索。最后的均衡阶段使用输入到最后均衡阶段或由最后均衡阶段选择的星座点的子集来确定最终符号判定。

10. 发明申请

WO2008028740A1 RATE CONTROL WITH IMPERFECT FEEDBACK 审中-公开
标题翻译：不正确的反馈速率控制
公开(公告)号：WO2008028740A1
公开(公告)日：2008-03-13
申请号：PCT/EP2007/058229
申请日：2007-08-08
申请人： Telefonaktiebolaget L M Ericsson (publ) , KHAYRALLAH, Ali S.
发明人： KHAYRALLAH, Ali S.
IPC分类号： H04L1/00 , H04L1/16
CPC分类号： H04L1/0026 , H04L1/0009 , H04L1/1607 , H04L2001/0098 , H04L2001/125
摘要： A transmitting station divides an information block intended for a receiving station into a plurality of subsets and codes each subset of said information block at a different coding rate to obtain corresponding sets of coded bits for transmission to the receiving station. The coding rates for each subset are selected based on a channel quality estimate from the receiving station. The coding rates are related by the uncertainty in the channel quality estimate.
摘要翻译：发送站将用于接收站的信息块划分为多个子集，并以不同的编码率对所述信息块的每个子集进行编码，以获得用于发送到接收站的相应的编码比特集合。基于来自接收站的信道质量估计来选择每个子集的编码率。编码率与信道质量估计的不确定性有关。

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