Research on Noise Reduction for Millisecond Pulsar Signal Based on Wavelet Transform

In this paper, the theory of the wavelet analysis and application of the wavelet analysis to the de-noise process is introducted. The weak millisecond pulsar signal by de-noising method based on the wavelet threshold is detected. The soft threshold and hard threshold methods are also introduced. When J equals to 5, the results is available for 0437-4715 signal. The experimental results show that the de-noising method based on the wavelet threshold is a good manner in extracting useful signal and displaying noise and mutable signal.