Abstract
In this paper, the eigenvalue analysis of the channel characteristics of low-voltage power lines is carried out, and the characteristics of impedance, signal attenuation and noise interference are studied. Based on the characteristics of China’s power grid and the on-site measurement of power lines in residential communities and metalworking internships, the noise sources and corresponding noise characteristics of low-voltage power line networks are analyzed. Aiming at the characteristics of signal attenuation and interference on low-voltage power lines, which are complex, random, and time-varying, and difficult to describe with more accurate analytical or mathematical models, several anti-interference measures to improve communication quality are proposed: Data packet reorganization Adding a wave blocker, multipath receiving technology, spread spectrum communication technology, and adopting a standardized communication protocol, and applying it to engineering experiments, the practice proves that the measures used are feasible and effective.
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