摘要
使用自适应OFDM技术改善可见光通信系统性能,需要以准确的信道估计为前提。研究可见光自适应OFDM通信系统的基于导频的信道估计方法,引入射频通信中常用的LMS方法,与可见光信道基于LS的估计方法进行了比较,并对其特性进行了分析,仿真实验结果表明,采用LMS估计方法在BER为10-3水平时,SNR优于LS估计方法2 dB,LMS信道估计方法信道跟踪能力较强,比LS法抗干扰。
Based on accurate channel estimation,adaptive OFDM technology can be used to improve the visible light com-munication system performance. The method of pilot-based channel estimation used in visible light adaptive OFDM communica-tion systems is researched by introducing the LMS methods which is commonly used in the RF communication. Through com-pared with the existing LS-based estimation methods,their characteristics are analyzed. The simulation results show that when BER turns to be 10-3 with LMS estimation method,the SNR can be 2dB better than LS method. So the channel tracking ability of LMS channel estimation method is stronger,and the anti-jamming capability is better than LS method.
出处
《现代电子技术》
2014年第7期31-34,共4页
Modern Electronics Technique
