The Design and Implementation of Notch Filter Based on Least Mean Square

Abstract

Data acquisition and analysis system often encounters interference of single frequency or narrowband signal in work. For example, in power frequency environment, 50Hz interference signal often affects the normal operation of the system and affects the effect of data acquisition and analysis. For narrowband or single frequency noise, the best denoising method is notch filter. This paper describes the design of notch filter based on least mean square (LMS) algorithm and its implementation based on single chip computer platform. The simulation and experimental results show that this method achieves good results in filtering effect and system computing speed.