Power line communication signal denoising method based on power iteration ICA algorithm

Abstract

The invention discloses a power line communication signal denoising method based on a power iteration ICA algorithm. The power line communication signal denoising method specifically comprises the following steps of 1, collecting original mixed signals of a power line; step 2, preprocessing the mixed signal in the step 1 to enable the mixed signal to be close to the basic assumption of ICA (Independent Component Analysis); 3, selecting a proper ICA unmixing mode, and solving a power iteration formula; carrying out power iteration ICA decomposition on the mixed signal preprocessed in the step 2 to obtain two groups of independent demixing signals; and step 4, recognizing the two groups of decomposed unmixing signals, comparing preset thresholds, judging to obtain a communication signal and a noise signal, and completing signal-noise recognition. According to the power line communication signal de-noising method based on the power iteration ICA algorithm, the power iteration ICA algorithm is used for executing signal de-mixing, noise suppression is achieved, high efficiency and accuracy of communication are met, and the real-time performance and communication quality of a power line communication system are better improved.

Description

technical field [0001] The invention relates to the field of telecommunication, in particular to a power line communication signal denoising method based on a power iterative ICA algorithm. Background technique [0002] Power Line Communication (PLC for short) technology is a communication method that uses a power line as a transmission medium for information transmission. With the wide distribution of existing power line networks, this technology can not only save network construction costs, but also has the advantages of wide coverage and convenient connection. Therefore, in recent years, PLC technology has received more and more attention, and has gradually become a smart grid, automatic intelligent Research hotspots in meter reading, smart home and other fields. [0003] However, since the original purpose of the power line network is to transmit electric energy, not for communication, the channel environment of the power line communication system is very bad, mainly ma...

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Problems solved by technology

[0003] However, since the initial construction purpose of the power line network is to transmit electric energy, not for communication, the channel environment of the power line communication system is very bad, mainly manifested in serious channel loss, multipath effect, and very large noise interference

These power line communication characteristics lead to a low signal-to-noise ratio for the signal received by the receiver, and the demixing of the communication signal and the noise signal is complicated, and it is impossible to realize the correct transmission of communication data under the condition of low signal-to-noise ratio

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