Abstract
Noise is one of the most important factors affecting the reliability of low-voltage power line carrier communication. In order to fully grasp the noise characteristics, a channel analysis equipment has been designed to collect and analyze noise. The analysis results show that power line noise is mostly manifested as a combination of colored background noise and pulse noise, mainly concentrated in the frequency band below 700kHz. Compared with the low peak period of electricity consumption, the peak period has stronger time-varying noise, larger amplitude of background noise, richer components of pulse noise, and there is also jitter in the duration of periodic pulse noise.
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