一种抑制窄带干扰信号方法的研究  

The Search of Rejecting Narrowband Interference

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,300072

出　　处：《信号处理》2003年第6期546-550,共5页Journal of Signal Processing

摘　　要：窄带干扰信号是采集系统中一种常见干扰,如系统中经常存在较强的50Hz市电干扰。而这类干扰抑制的方法常需要在处理复杂度与效果间折衷。本文以自适应相干模板法为例,分析了其局限性,在此基础上探讨了一种窄带干扰信号的抑制方法,通过跟踪周期性干扰信号的频率变化,微调采样率,而后利用自适应相干模板法,较好地实现了窄带干扰信号的抑制。模拟实验结果表明,这一方法对有一定漂移的窄带干扰信号具有很好的抑制效果。该方法同样实用其它整系数滤波器。Narrowband interference, such as power interference, is very common. Sometime compromise has to be made between effect and complexity. The adaptive coherent model is analyzed, and a method of rejecting narrowband interference is proposed. The method detects the frequency fluctuation of interference signal and adjusts the sampling rate accordingly. Then the sampled data is processed with the adaptive coherent model. The method can reject the narrowband interference effectively. The experiment shows that the method is efficient and can also be used with other integer filters.

关 键 词：窄带干扰信号 采集系统 自适应相干模板法 干扰抑制 滤波器 

分 类 号：TN911.4[电子电信—通信与信息系统]