Research on Communication Signal Noise-Reduction Based on the Improved Wavelet Multi-Scale Decomposition

摘要

In order to reduce communication signal noise better, the paper uses improved wavelet transform multi-scale decomposition method to carry out decomposition analysis on communication signal. First analyze the basic theory of one dimension and two dimensions, then carry out multi-scaledecomposition on improved wavelet transformation, high frequency and component decomposition, selectively filter the noise, explain two threshold determination methods of wavelet noise reduction, finally carry out the example simulation, carry out simulation analysis on original signal withdifferent noise ratio and noise reduction performance with different threshold determination method. Experiment shows that the signal has high noise ratio, small equal square error after using this method to reduce, which has certain applied value.