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公开(公告)号：US06944245B2
公开(公告)日：2005-09-13
申请号：US10688714
申请日：2003-10-17
CPC分类号： H04L25/03038 , H04L2025/03407 , H04L2025/03477
摘要： An iterative method (400) and apparatus (200) for a receiver for reducing interference in a desired signal in a GSM communication system that use a finite-impulse-response filter combined with alternate quadrature component output selection for alternate linear equalization. The method includes inputting a burst of data of a received waveform including interference, training an alternate linear output filter with a midamble of known quadrature phase, providing an estimate of the desired signal by operating on the received waveform with the finite-impulse-response filter, generating log likelihood ratio estimates for a plurality of bits in the burst of data, selecting bits from the burst of data base upon a predetermined condition, and re-training the alternate linear output filter to provide a second improved estimate of the desired signal.
摘要翻译： 一种用于在GSM通信系统中减少对期望信号的干扰的接收机的迭代方法（400）和装置（200），所述GSM通信系统使用与交替的线性均衡的交替正交分量输出选择相组合的有限脉冲响应滤波器。 该方法包括输入包括干扰的接收波形的数据脉冲串，训练具有已知正交相位的中间码的交替线性输出滤波器，通过利用有限脉冲响应滤波器对接收到的波形进行操作来提供期望信号的估计 ，产生数据突发中的多个比特的对数似然比估计，根据预定条件从数据库突发中选择比特，并重新训练交替的线性输出滤波器以提供期望信号的第二改进估计。
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公开(公告)号：US07818632B2
公开(公告)日：2010-10-19
申请号：US11427057
申请日：2006-06-28
IPC分类号： G08C25/02
CPC分类号： H04L1/0061 , H03M13/09 , H03M13/451 , H03M13/458 , H04L1/0054
摘要： A communications system for reducing bit errors in a received data sequence provides a method for generating candidate code-word sequences for evaluation by a CRC decoder. The system may determine a most-likely received sequence using the probable code-word list of candidate sequences. The number of candidate sequences may be reduced using computational complexity reduction methods. A communications device also provides a candidate sequence generator for use with a CRC decoder to determine a most-likely received sequence and to reduce bit errors in a received sequence.
摘要翻译： 用于减少接收数据序列中的位错误的通信系统提供了一种用于产生候选码字序列以供CRC解码器评估的方法。 系统可以使用候选序列的可能的码字列表来确定最可能接收的序列。 可以使用计算复杂度降低方法来减少候选序列的数量。 通信设备还提供与CRC解码器一起使用的候选序列发生器，以确定最可能的接收序列并减少接收序列中的比特错误。
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公开(公告)号：US07471749B2
公开(公告)日：2008-12-30
申请号：US10694464
申请日：2003-10-27
IPC分类号： H04L25/08
CPC分类号： H04L25/0244 , H04L25/0224 , H04L27/2017 , H04L2025/03407 , H04L2025/03414
摘要： Methods (FIGS. 7 and 8) and corresponding apparatus (200) for estimating a parameter (125) associated with a received signal (120), one method comprising: providing (704, 806) a signal sample (129, 301) corresponding to the received signal (120); processing the signal sample (705, 807) to suppress on channel interference and provide a processed sample or signal estimate; and determining, for example, a delay parameter by comparing (709, 809) the processed sample to a predetermined sample.
摘要翻译： 用于估计与接收信号（120）相关联的参数（125）的方法（图7和8）和相应的装置（200），一种方法包括：提供（704,806）对应于 接收信号（120）; 处理信号样本（705,807）以抑制信道干扰并提供经处理的采样或信号估计; 以及通过将经处理的样品（709,809）与预定样品进行比较来确定例如延迟参数。
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公开(公告)号：US07187736B2
公开(公告)日：2007-03-06
申请号：US10366106
申请日：2003-02-13
IPC分类号： H04B1/10
CPC分类号： H04L25/0244 , H04L25/0224 , H04L27/2017 , H04L2025/03407 , H04L2025/03414
摘要： A method for reducing interference in a desired signal in a GSM communication system uses a finite-impulse-response filter for alternate linear equalization. The method includes a first step (300) of inputting a burst of data of a received waveform including interference from a channel of the communication system. A next step (302) includes training the finite-impulse-response filter with a set of symbols of specific quadrature phase, known a priori, in the burst of data of the received waveform. For example known real only and imaginary only symbols are alternatively selected from a midamble of the data burst. A next step (304) includes operating on the received waveform with the finite-impulse-response filter to alternately linearly equalize the burst of data to provide an estimate of the desired signal.
摘要翻译： 用于减少GSM通信系统中的期望信号的干扰的方法使用有限脉冲响应滤波器进行交替的线性均衡。 该方法包括：输入包括来自通信系统的信道的干扰的接收波形的数据的突发的第一步骤（300）。 下一步骤（302）包括在接收波形的数据脉冲串中先验已知的具有特定正交相位的一组符号来训练有限脉冲响应滤波器。 例如，可以从数据脉冲串的中同步码中选择已知的仅实际和仅虚拟符号。 下一步骤（304）包括利用有限脉冲响应滤波器对接收到的波形进行操作，以交替地线性均衡数据突发以提供期望信号的估计。
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