低压PLC信道条件下DCSK系统的性能分析  

Performance Analysis of the DCSK System under the Channel of L-PLC

作　　者：王振朝[1] 张士兵[1] 侯惠然 

机构地区：[1]河北大学电子信息工程学院,河北保定071002 [2]中电飞华通信有限公司,北京100029

出　　处：《电测与仪表》2010年第2期35-39,44,共6页Electrical Measurement & Instrumentation

基　　金：河北省自然科学基金(F2009000224);河北省科技攻关计划(06213552;072135190)

摘　　要：针对现有对低压PLC信道特性研究及用于低压PLC的调制技术的局限性,本文将混沌理论引入PLC技术的研究。通过计算分析低压PLC信道不同条件下实测噪声序列的混沌特征参数:关联维数、Lyapunov指数和Kolmogorov熵,证明了低压PLC信道具有混沌特征。通过分析DCSK在低压PLC信道多径瑞利衰落模型及混沌噪声模型下的系统性能,得出了DCSK具有抑制低压PLC信道衰落及噪声的能力。仿真实验表明,DCSK在低压PLC系统模型下的误码性能优于传统数字调制方式。Low-voltage power line communication （L-PLC） provides an alternative and cost effective network medium, with the defect of channel characteristic study and used modulation technologies. In this paper, the L-PLC channel characteristics are studied based on chaos theory. The correlation dimension, largest Lyapunov exponent and Kolmogo entropy of noise series measured from the L-PLC channel are calculated under different conditions. The results prove that L-PLC channel is a chaotic system. Besides, the BER performance of differential chaos shift keying （DCSK） under the conditions of chaotic noise and multipath rayleigh fading are analyzed due to the corresponding characteristics of L-PLC channel. And then the simulation and analysis are carried out. The simulation results show that DCSK have a good capacity to suppress the noise of the L-PLC channel and its muhipath rayleigh fading. The BER performance of DCSK is superior to the traditional way.

关 键 词：低压电力线通信 信道特性 混沌 DCSK 

分 类 号：TM764[电气工程—电力系统及自动化]