COMMUNICATIONS CHANNEL SYMBOL RECOVERY BY COMBINING OUTPUTS AT DIFFERENT DECISION DELAYS
    52.
    发明申请
    COMMUNICATIONS CHANNEL SYMBOL RECOVERY BY COMBINING OUTPUTS AT DIFFERENT DECISION DELAYS 审中-公开
    在不同决策延迟下组合输出的通信通道符号恢复

    公开(公告)号:WO2007001703A2

    公开(公告)日:2007-01-04

    申请号:PCT/US2006020259

    申请日:2006-05-25

    Abstract: A method and apparatus for communications channel symbol recovery that improves equalizer performance adds together the log-likelihood ratios (LLRs) of different decision delays rather than using LLRs corresponding only to a single decision delay. A low complexity method comprises, determining an initial coarse delay and a set of fine delays (1003), estimating a training sequence and filter taps set for each fine delay (1007), determining an error function for each fine delay (1009), and linearly combining the filter taps (1013) for determining the symbol estimates (1017).

    Abstract translation: 用于提高均衡器性能的用于通信信道符号恢复的方法和装置将不同决策延迟的对数似然比(LLR)加在一起,而不是仅使用对应于单个判决延迟的LLR。 低复杂度方法包括:确定初始粗延迟和一组精细延迟(1003),估计每个精细延迟(1007)设置的训练序列和滤波器抽头,确定每个精细延迟(1009)的误差函数,以及 线性组合用于确定符号估计的滤波器抽头(1013)(1017)。

    METHOD FOR MODULATION DETECTION
    54.
    发明申请
    METHOD FOR MODULATION DETECTION 审中-公开
    调制检测方法

    公开(公告)号:WO2005043927A2

    公开(公告)日:2005-05-12

    申请号:PCT/US2004031128

    申请日:2004-09-23

    CPC classification number: H04L27/0012

    Abstract: A method of modulation detection. A signal is received (710). A first decision statistic can be generated based on the received signal (720). The received signal can be transformed (725). A second decision statistic can be generated based on the transformed received signal (735). A selected modulation type can be determined based on comparing the first decision statistic with the second decision statistic (740).

    Abstract translation: 调制检测方法。 接收到信号(710)。 可以基于接收到的信号来生成第一判定统计量(720)。 接收到的信号可以被转换(725)。 可以基于变换的接收信号来生成第二判定统计量(735)。 可以基于将第一判定统计量与第二判定统计量进行比较来确定选择的调制类型(740)。

    REDUCING INTERFERENCE IN A GSM COMMUNICATION SYSTEM
    56.
    发明申请
    REDUCING INTERFERENCE IN A GSM COMMUNICATION SYSTEM 审中-公开
    减少GSM通信系统中的干扰

    公开(公告)号:WO2004073185A3

    公开(公告)日:2004-12-23

    申请号:PCT/US2004004424

    申请日:2004-02-11

    Abstract: 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.

    Abstract translation: 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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