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为了提高用小波分析方法进行信号处理的性能,提出了一种根据信号自身特点选择小波基的新算法,即用离散信号的幅值差分表征信号的规则性,根据规则性选取相应的小波基组,然后比较在不同小波基下进行分解的小波系数,系数最大的即为最佳小波基.确定小波基种类后,进一步根据信号检测的目的确定小波分解层数.采用这一方法对卫星激光链路中的遥测信号进行分析,准确定位了光电轴角编码器的不同故障.
In order to improve the performance of signal processing using wavelet analysis method, a new algorithm based on the characteristics of the signal to select the wavelet base is proposed. The algorithm uses the amplitude difference of the discrete signal to characterize the signal regularity and selects the corresponding wavelet base set according to the regularity , And then compared the wavelet coefficient decomposed under different wavelet bases, the coefficient of the largest is the best wavelet base.After determining the wavelet base type, the wavelet decomposition level is further determined according to the purpose of signal detection.Using this method, Road telemetry signal analysis, accurate positioning of optical shaft encoder different fault.