基于自适应陷波器的干扰抑制研究  

A study of interference rejection based on adaptive notch filter

作　　者：刘芳芳 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2008年第9期33-38,共6页Applied Science and Technology

摘　　要：采用自适应陷波滤波器抑制通信系统中的干扰,从信号与干扰的频率差及干扰频率个数2个方面讨论了对滤波效果的影响,重点研究了信号与干扰频率非常临近的情况,在仅相差几赫兹时仍能保证20dB的信噪改善比,验证了自适应陷波滤波器在不同情况下滤除干扰的优良性能.This paper uses adaptive notch filter for rejecting the interference in the communication systems. Its filtering effects were discussed from two aspects： the difference of frequency between the signals and interference and the number of interference signals. The case where the frequency of signal is very approaching to that of interference was discussed emphatically. The results showed that the method can reach 20dB signal/noise improvement ratio even when the frequency difference is only a few hertzs between the signals and interference, proving the effectiveness of adaptive notch filter in interference rejection under various situations.

关 键 词：自适应陷波 临近频率 多级陷波 

分 类 号：TN911.22[电子电信—通信与信息系统]