Analysis of Morse Signal Noise Reduction Methods

Abstract

This article applies several common speech noise reduction methods to Morse signal noise reduction, and compares and analyzes these several noise reduction methods. The paper introduces the Morse signal and the necessity of noise reduction and the principles, processes, advantages and disadvantages of different noise reduction methods such as band-pass filtering, spectral subtraction and other traditional methods, and noise reduction based on U-Net image segmentation. The effects of noise reduction methods are analyzed by the comparison of time-domain diagram and frequency-domain diagram of the same Morse signal before and after noise reduction. Finally, it is concluded that the noise reduction based on U-Net image segmentation has a better effect.