Power line noise compression method and device thereof based on compressive sensing

Abstract

The invention discloses a power line noise compression method based on compressive sensing. When a power line is unloaded, noise on the power line is subjected to strong electrical isolation and attenuation through a coupler; then, noise of a power line channel is acquired through noise acquisition equipment; the acquired noise of the power line channel is divided into background noise and random noise; then, characteristic data of the background noise are extracted in a time domain and stored; the random noise is compressively sensed in a frequency domain according to an observation matrix; and furthermore, main information obtained after the random noise is processed is stored. The invention further discloses a power line noise compression device based on compressive sensing. By means of the invention, when the power line is unloaded, the power line noise acquired from the power line in a coupled manner is effectively compressed and stored; therefore, the volume of data in need of being stored can be effectively reduced; and the relatively high compression removal rate can be achieved.

Description

technical field [0001] The invention belongs to the technical field of power line broadband signal processing, and in particular relates to a power line noise compression method and device based on compressed sensing. Background technique [0002] Power line communication (PowerLine Communication, PLC) network is one of the largest networks in the world. Power line communication uses power lines as a communication channel, and power lines are designed for power transmission, not specifically for transmission of communication data. Its topology and physical characteristics are different from conventional communication transmission media. Coupled with the harsh environment of the power grid, the influence of power line channel attenuation, noise interference, and electromagnetic compatibility of electrical equipment, the performance of power line communication changes randomly with time, frequency, load access and cut-out, which seriously affects the communication quality. . ...

AI Technical Summary

Problems solved by technology

Therefore, collecting power line noise requires a very high sampling rate. For ordinary power line noise collection equipment, it is difficult to store these large amounts of collected data completely and effectively for a long time.

[0005] At present, the existing power line noise recording equipment only couples and collects the power line noise from the power line when the power line is unloaded, and stores all the collected noise. Due to the high sampling rate, the storage capacity reaches T after only a few hours of recording. level, the storage cost is too high

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