A Method for Suppressing Coloured Background Noise in Low-Voltage Power Lines

Abstract

In low-voltage power line communication, the persistence of coloured background noise seriously affects the signal transmission quality of power line communication, so it is particularly important to suppress coloured background noise. In this paper, a compression-aware coloured background noise suppression method is proposed to suppress the coloured background noise in power line communication by using the sparse structure property of the compression-aware reconstructed signal. Simulation experiments show that, compared with the traditional wavelet denoising method, the CS denoising method reduces MSE by 16.1% and improves SNR from 22.4db to 27.9db, an improvement of 12.7%. Especially in the case of short signal lengths, the denoising performance of CS is substantially improved and has obvious advantages, which can significantly improve the communication quality of power line transmission.