Adaptive notch filter design under multiple identical bandwidths

作者：Wang, Qiusheng; Gu, Xiaolan^*; Lin, Jinyong

来源：AEU-International Journal of Electronics and Communications, 2017, 82: 202-210.

DOI：10.1016/j.aeue.2017.08.054

• Adaptive notch filters (ANF)
• Multiple notch filters
• All-pass filters
• Least mean square (LMS)
• Identical bandwidths

Digital notch filters are applied to remove or suppress the narrow-band interferences in digital signals, while preserving other components unchanged. Under the condition of the identical notch bandwidths, a novel design method is put forward in this paper to realize the adaptive notch filter with infinite impulse response (IIR). Firstly, a specially simplified all-pass filter is introduced to construct an HR non-adaptive notch filter, which serves as the core part in the adaptive one. Secondly, the criterion of least-mean-square (LMS) is applied to design the desired adaptive notch filter (ANF). The designed ANF can track and suppress multiple non-harmonic interference components simultaneously. Finally, the effectiveness and practicability of the proposed design method are verified by a set of experimental results.

• 出版日期2017
• 单位北京航空航天大学