OFDM signal separation method for power line communication based on FastICA algorithm

被引：0
|
作者：
Hu Z. [1 ]
He D. [1 ]
Xie Z. [1 ]
机构：
[1] School of Electrical & Electronic Engineering, North China Electric Power University, Baoding
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 12期
基金：
中国国家自然科学基金;
关键词：
FastICA algorithm; OFDM; Power line communication; Separation of signal and noise; Synchronization;
D O I：
10.16081/j.epae.201911027
中图分类号：
学科分类号：
摘要：
An OFDM(Orthogonal Frequency Division Multiplexing) signal separation method for power line communication based on FastICA(Fast Independent Component Analysis) algorithm is proposed. On the basis of the separation of the two path observation signals by FastICA algorithm, the amplitude of the preamble field of the unmixed signal is normalized and interrelated with the corresponding fields of the lea-ding sequence of the OFDM symbol respectively, and taking the unmixed signal with the largest correlation value as the communication signal, the correct recognition of communication signal and noise is realized. The separation ratio is defined as the ratio of the maximum value of the two correlation values, which is used as the evaluation criterion for the unmixed effect. By setting the appropriate threshold of separation ratio, the desired unmixed effect is achieved. Using the preamble field of the unmixed signal as the refe-rence phase, the DBPSK modulation and demodulation method is used to achieve the reception data unrelated to the phase of the unmixed signal. A MATLAB communication system simulation model is built, and the effectiveness of the proposed method under the condition of low SNR(Signal Noise Ratio) without error correction coding is confirmed. The realizability of the proposed algorithm is verified and tested based on hardware platform. © 2019, Electric Power Automation Equipment Press. All right reserved.
引用
收藏
页码：212 / 217
页数：5
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