电力多载波系统自适应信道估计算法研究  

Research on Adaptive Channel Estimation Algorithm in Power Multicarrier System

作　　者：李维[1] 杨家全[1] 赵友[2] 

机构地区：[1]云南电网公司电力科学研究院,云南昆明650217 [2]电子科技大学,四川成都611731

出　　处：《电力信息与通信技术》2014年第11期39-43,共5页Electric Power Information and Communication Technology

摘　　要：文章将欧洲第二代数字地面电视广播标准(DVB-T2)应用于电力通信系统,并重点对接收机信道估计进行了研究。DVB-T2采用编码正交频分复用(COFDM)调制方案,其信道估计传统上采用基于导频的实系数内插方法,不能对抗长时延回波。文章提出了一种基于最小均方误差(LMS)自适应的复系数内插信道估计方法,确保动态无线信道中电力系统信息的稳定传输。仿真结果表明,该算法对无线信道信息有更高的估计精度,可以改善电力多载波系统的误码性能。The European second generation digital terrestrial television broadcasting standard （DVB-T2） is introduced in the electric power communication system in this paper, and the paper focuses on the research of channel estimation. DVB-T2 adopts coded orthogonal frequency division multiplexing （COFDM） modulation scheme, the channel estimation method based on the traditional inserting real coefficient pilot, not against the long delay echo. In this paper, A complex-coefficient interpolation method based on the least-mean-square （LMS） adaptation is proposed to reliably transmit information in the power communication system. Simulation results show the proposed method improves the precision of channel estimation, so the bit-error-rate （BER） performance of the power multi-carrier system is improved.

关 键 词：电力通信 DVB—T2 OFDM 信道估计 

分 类 号：TN913.6[电子电信—通信与信息系统]