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    SOFT DECISION PROCESSING
    3.
    发明申请
    SOFT DECISION PROCESSING 审中-公开
    软件决策处理

    公开(公告)号：WO2008012541A3

    公开(公告)日：2008-03-20

    申请号：PCT/GB2007002840

    申请日：2007-07-25

    Applicant: TTP COMMUNICATIONS LTD ,  VALADON CYRIL ,  PACHETTI CARLO

    Inventor： VALADON CYRIL ,  PACHETTI CARLO

    IPC: H04L25/06 ,  H03M13/45 ,  H04L1/00 ,  H04L1/18

    CPC classification number: H04L25/067 ,  H03M13/45 ,  H04B1/707 ,  H04L1/0054 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/1893

    Abstract: A method of producing soft decisions for a signal, wherein a model provides an expression for an LLR for the signal, the LLR expression is dependent on noise power in the signal and can be rendered in a form independent of the noise power, wherein the method comprises evaluating the noise power independent expression using values from the signal to produce soft decisions, calculating a weight expressing the noise power affecting a soft decision relative to the noise power affecting at least one other soft decision and applying the weight to its respective soft decision.

    Abstract translation: 一种为信号产生软判决的方法，其中模型为信号的LLR提供表达式，LLR表达式依赖于信号中的噪声功率并且可以以独立于噪声功率的形式呈现，其中该方法 包括使用来自所述信号的值来评估所述噪声功率无关表达式，以产生软判决，计算表示影响软判决的噪声功率相对于影响至少一个其他软判决的噪声功率的权重，并将所述权重应用于其各自的软判决。

    METRIC CALCULATIONS FOR MAP DECODING USING THE BUTTERFLY STRUCTURE OF THE TRELLIS
    4.
    发明申请
    METRIC CALCULATIONS FOR MAP DECODING USING THE BUTTERFLY STRUCTURE OF THE TRELLIS 审中-公开
    使用TRELLIS的BUTTERFLY结构进行地图解码的公制计算

    公开(公告)号：WO2006092564A8

    公开(公告)日：2007-10-25

    申请号：PCT/GB2006000652

    申请日：2006-02-24

    Applicant: TTP COMMUNICATIONS LTD ,  VALADON CYRIL

    Inventor： VALADON CYRIL

    IPC: H03M13/45

    CPC classification number: H03M13/3927 ,  H03M13/3961

    Abstract: A method of calculating branch metrics for a butterfly in a trellis of a MAP-genre decoding algorithm, the method comprising providing initialised branch metrics for the transitions in the butterfly and incrementing the branch metrics with a group of data values corresponding to said transitions in accordance with control signals derived from the butterfly index and one or more polynomials describing tap positions of the encoding equipment to whose operation the trellis relates, wherein said group comprises systematic bit and parity bit values.

    Abstract translation: 一种在MAP类型解码算法的网格中计算蝴蝶的分支度量的方法，所述方法包括：提供用于蝶形转换的初始化分支度量，并根据对应于所述转换的一组数据值递增分支度量 具有从蝴蝶索引导出的控制信号和一个或多个多项式来描述网格与其操作相关的编码设备的抽头位置，其中所述组包括系统位和奇偶校验位值。

    TUNABLE FILTER FOR TONE DETECTION
    5.
    发明申请
    TUNABLE FILTER FOR TONE DETECTION 审中-公开
    可调滤波器用于音调检测

    公开(公告)号：WO2006092571A8

    公开(公告)日：2006-12-21

    申请号：PCT/GB2006000686

    申请日：2006-02-27

    Applicant: TTP COMMUNICATIONS LTD ,  VALADON CYRIL

    Inventor： VALADON CYRIL

    IPC: H04Q1/46

    CPC classification number: H04Q1/46

    Abstract: Apparatus arranged to analyse a signal comprising a series of symbols, the apparatus comprising means for calculating a metric of said signal, filter means for filtering said signal, means for calculating a metric of said filtered signal and means for comparing said metrics, wherein the filtering means is arranged to track a spectral feature of the signal and maintain that feature within the pass band of the filtering means. According to one aspect, the apparatus uses an adaptation of the Modified Goertzel Algorithm, wherein the frequency response of the filter is adapted to take into account the frequency offset estimate for each block of K samples.

    Abstract translation: 用于分析包括一系列符号的信号的装置，所述装置包括用于计算所述信号的度量的装置，用于对所述信号进行滤波的滤波器装置，用于计算所述经滤波的信号的度量的装置以及用于比较所述度量的装置，其中所述滤波 装置被设置成跟踪信号的频谱特征并将该特征保持在滤波装置的通带内。 根据一个方面，该设备使用修改的Goertzel算法的修改，其中滤波器的频率响应适于考虑K个样本的每个块的频率偏移估计。

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