窄带电力线载波通信信道特性建模及分析

Modeling and Analysis of Channel Characteristics of Narrow-Band Power Line Carrier Communication

为降低电力线信道特性对电力线载波通信过程的影响,文中基于G3-PLC.标准对电力线的信道特性进行了研究及建模分析,对采集的多组实测电力线噪声进行时频二维空间仿真,提出了窄带电力线通信的选频依据.结果表明:电力线信道具有阻抗特性、衰减特性和噪声干扰特性,且实测的电力线信道在低频段具有较强的窄带噪声干扰,适用于G3-PLC.标准的通信频段为35~96kHz,且该频段噪声对通信过程的影响比其他频段小.

In order to reduce their influence on the power line carrier communication process,the channel characteristics of the power line are studied and modeled based on the G3 PLC standard in this paper.Groups of noise measured on real power lines are simulated in the time frequency two dimensional space,and the frequency selective basis for the narrow band power line communication is proposed.The results show that the power line channel has the characteristics of impedance,attenuation and noise interference and that the measured power line channel has strong narrow band noise interference in the low frequency band.The communication frequency range applicable to G3 PLC standard is 35~96 kHz,in which noise has less impact on the communication process than in other bands.