【作者】 张世平； 赵永平； 沈国锋； 张绍卿；

【Author】 Zhang Shiping Zhao Yongping Shen Guofeng Zhang Shaoqing (Department of Automatic Measurement and Control,Harbin Institute of Technology,Harbin 150001,China)

【机构】 哈尔滨工业大学自动化测试与控制系；

【摘要】 为了有效地消除信号中的低频干扰,本文研究了ⅡR格型陷波滤波器的系数敏感度问题。在分析了三种格型滤波器的结构和敏感度的基础上,认为基于全滤波器的ⅡR陷波器在低频段具有最低的系数敏感度。通过一个设计实例说明了这种纯格型结构由于量化效应引起的频率偏移量要远远小于级联式格型结构。最后通过在电力线通信中的实际应用验证了该滤波器的性能。更多还原

【Abstract】 To remove low frequency interference effectively from signal by lattice IIR notch filter,the problem of sensitivity to coefficient is investigated. Three kinds of structures and sensitivity of lattice IIR notch filters being compared,it is obtained that the approach based on all-pass filter has the least sensitivity at low frequency. A design example indicates that notch frequency shift of pure lattice structure after coefficient quantization is much less than that of cascade lattice structure. Moreover,an actual application in power line communication is presented to demonstrate the performance of this notch filter.更多还原