自适应相干模板法滤波的分析及改进  

An Improved Adaptive Coherent Model and Analyses

作　　者：叶文宇[1] 李刚[1] 林凌[1] 谌雅琴[1] 虞启琏[1] 

机构地区：[1]天津大学精密仪器及光电子工程学院,天津300072

出　　处：《仪器仪表学报》2004年第2期248-252,共5页Chinese Journal of Scientific Instrument

摘　　要：讨论了一种自适应相干模板法的改进方案。该方案通过跟踪周期性干扰信号的频率变化 ,微调采样频率 ,改善了自适应模板法滤波性能。通过对采集结果的分析 ,证明了这一方案的可行性。该方法较传统的自适应模板法有较大性能的提高 ,其可以跟随周期性干扰的变化自动调整干扰信号陷波频带的中心位置 ,从而取得较好的滤波效果。模拟实验结果表明 ,该方法对滤波效果有显著的改善。An improved adaptive coherent model is presented. It can remove the interference of power supply more efficiently than the conventional one. Its stop band center of filter can drift with the change of frequency of power supply. So the stop band of filter can be designed more narrow and the filtered result can keep more valuable component of signal. The experiment shows that the method is more efficient and can be used more widely.

关 键 词：自适应相干模板法 工频干扰 滤波 采样频率 生物信号采集系统 

分 类 号：TN713[电子电信—电路与系统]