低压电力线信道中脉冲噪声的建模及仿真  

Modeling and simulation of the impulse noise in low voltage power line communication channel

作　　者：李平[1] 赵志辉[1] 张振仁[1] 

机构地区：[1]第二炮兵工程学院,陕西西安710025

出　　处：《继电器》2007年第5期58-62,共5页Relay

摘　　要：在低压电力线信道的各种噪声中,随机脉冲噪声是影响高速电力线通信的主要因素。首先分析了低压电力线信道的噪声特性,尤其是脉冲噪声;通过将噪声状态分组,并引入过渡状态,建立了基于分群马尔可夫链的脉冲噪声统计模型,并用单差错状态Fritchman模型的无差错游程分布来拟合实际测量的概率曲线,从而得出模型的各参数值。最后进行了相应的测量及仿真,给出了脉冲间隔时间和脉冲宽度的概率分布曲线。仿真研究结果表明,所建模型是有效的。In various noises of the channel of low-voltage power line, the random impulse noise is the main factor that influences high-speed power line communication. In this paper, channel noises of low voltage power line, especially impulsive noise are introduced firstly, and then based on a Partitioned Markov Chain, the statistical model of impulsive noise is established. The error-free intervals distribution of single mistake state Fritchman model is used to fit the measured actually, and every parameter value of the model is obtained. Finally, the measurement and simulation results of pulse width and interardval times are given. The simulation results show that the established models arc available.

关 键 词：电力线通信 信道特性 脉冲噪声 马尔可夫模型 

分 类 号：TM73[电气工程—电力系统及自动化] TM743