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    • 1. 发明申请
    • METHOD AND APPARATUS FOR MERGING BIT PROBABILITY INFORMATION IN SERIAL LOCALIZATION WITH INDECISION
    • 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
    • WO2011051857A2
    • 2011-05-05
    • PCT/IB2010/054730
    • 2010-10-19
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)KHAYRALLAH, Ali S.
    • KHAYRALLAH, Ali S.
    • H04L27/34H04L27/38H04L25/03
    • H04L25/03229H04L25/03012H04L25/03318H04L27/3416H04L27/38H04L2025/03388H04L2025/0342H04L2025/03426
    • 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.
    • 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
    • OFDM SPECTRAL CONTROL
    • OFDM频谱控制
    • WO2010100076A1
    • 2010-09-10
    • PCT/EP2010/052423
    • 2010-02-25
    • TELEFONAKTIEBOLAGET L M ERICSSON (publ)DENT, PaulKHAYRALLAH, Ali S.
    • DENT, PaulKHAYRALLAH, Ali S.
    • H04L27/26H04L5/00H04L25/03
    • H04L27/2626H04L25/0202H04L25/0242H04L27/2634H04L27/2647
    • 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.
    • 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
    • METHOD AND APPARATUS FOR EQUALIZATION OF RECEIVED SIGNALS
    • 用于均衡接收信号的方法和装置
    • WO2011042870A2
    • 2011-04-14
    • PCT/IB2010/054511
    • 2010-10-06
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)KHAYRALLAH, Ali S.
    • KHAYRALLAH, Ali S.
    • H04L25/03318H04L25/03184H04L2025/03388
    • 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.
    • 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。
    • 6. 发明申请
    • DEMODULATION USING SERIAL LOCALIZATION WITH INDECISION
    • 使用序列本地化和指数进行解调
    • WO2011024127A2
    • 2011-03-03
    • PCT/IB2010/053820
    • 2010-08-25
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)KHAYRALLAH, Ali S.
    • KHAYRALLAH, Ali S.
    • H04L27/38
    • H04L27/38H04L25/03229H04L27/3416H04L2025/03388H04L2025/0342H04L2025/03426
    • 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.
    • 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
    • EQUALIZATION USING SERIAL LOCALIZATION WITH INDECISION
    • 利用序列局部化和指数平衡
    • WO2011024128A2
    • 2011-03-03
    • PCT/IB2010/053821
    • 2010-08-25
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)KHAYRALLAH, Ali S.
    • KHAYRALLAH, Ali S.
    • H04L25/03
    • H04L25/03229H04L25/03012H04L27/3416H04L27/38H04L2025/03388H04L2025/0342H04L2025/03426
    • 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.
    • 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。