The application of adaptive notch filter in the cab signal analysis

It is difficult to reduce the noise signal in the cab signal by normal filter because the frequency is similar to that of the modulated signal. So, the adaptive theory is introduced to realize the noise signal canceling. Through the analysis of the working principle and the theory of ratiocination, this paper designed a multi-frequency adaptive notch filter and applied it in the cab signal analysis to cancel the odd times of 50 Hz noise signals. From the experiment data, we can see that the effect of the adaptive notch filter is outstanding that can satisfy the requirement of the cab signal analysis.