低压电力线通信信道的马尔柯夫特性研究-中国电机工程学报.PDF

第 27 卷 第 22 期 中 国 电 机 工 程 学 报 Vol.27 No.22 Aug. 2007 2007 年 8 月 Proceedings of the CSEE ©2007 Chin.Soc.for Elec.Eng. 0258-8013 (2007) 22-0116-06 TM77 A 470 40 文章编号： 中图分类号： 文献标识码： 学科分类号： ⋅ 低压电力线通信信道的马尔柯夫特性研究 翟明岳，曾庆安 (华北电力大学信息系，北京市 昌平区 102206) Markov Characterization of LV Power Line Communications Systems Channels ZHAI Ming-yue, ZENG Qing-an （Department of Information Engineering ，North China Electric Power University, Changping District, Beijing 102206,China ） ABSTRACT: Based on the nature of impulse noise in the 模型基本转移矩阵。对基本转移矩阵的分析表明，8PSK 的 lower voltage power line communications (LV PLC) channels, 性能最优，其结论与已有的结论完全吻合，从侧面佐证了信 LV PLC channels are supposed to be memory channels, that is 道 Markov 模型的有效性。 Markov nature. In the paper, the characteristics of LV PLC 关键词：电力线通信系统；信道模型；马尔柯夫；基本转移 channels are analyzed in detail and a partitioned Markov chain is proposed to model the channels. According to the LV PLC 矩阵；脉冲噪声 channels, some hypothesis are suggested, which lead to the 0 引言 derivation of the error-free distribution. By employing the Hamilton theorem, the elements in the basic transition matrix P 由于电力线网络并不是专为高频信号传输而 could be solved with the nonlinear fitting method and the 设计的，因此电力线网络呈现出较多、较强的不 conditions for the general solution are given too. With the 利于高频信号传输的因素[1-6] 。电力线通信(PLC) proposed model, channel properties with signal modulated by 信道从而表现出非高斯、非平稳和非白噪的特性。 FSK, DPSK, QPSK and 8PSK are i