正交频分多路复用技术在电力光纤通信系统中的应用  

Application of Orthogonal Frequency Division Multiplexing Technology in Electric Power Optical Fiber Communication System

作　　者：孟婉婕[1] 吴少涛[1] 肖伟涛[1] 

机构地区：[1]广东电网公司河源供电局,广东河源517000

出　　处：《广东电力》2014年第1期105-109,共5页Guangdong Electric Power

摘　　要：提出将正交频分多路复用(orthogonal frequency division multiplexing,OFDM)技术应用到电力光纤通信系统中,以提高系统的可靠性和稳定性。针对光纤信道特性在频域上变化缓慢且相邻的信道特性高度相关的特点,在基于训练序列的信道估计中采用频域滑动平均方法来提高信道估计的准确性。仿真结果表明,相对于原始的信道估计方法,采用频域滑动平均信道估计方法后OFDM信号接收灵敏度提高1.5 dB,且相对背靠背时基本不会引入功率代价。This paper proposes to apply orthogonal frequency division multiplexing technology in electric power optical fiber communication system in order to improve reliability and stability of the system.Aiming at characteristics of slow change in frequency domain of properties of optical channel and high correlation of adjacent channel,it uses frequency domain moving average method in channel estimation based on training sequence to improve veracity of channel estimation.Simulation result indicates that being relative to original channel estimation method,it is able to improve 1 .5 dB OFDM signal receive sensi-tivity by using frequency domain moving average method and will not introduce power penalty relative to back-to-back.

关 键 词：电力光纤通信 正交频分复用 频域滑动平均 接收灵敏度 

分 类 号：TN929.11[电子电信—通信与信息系统]