利用重复序列和循环前缀的OFDM频率同步算法  

Synchronization Algorithm for OFDM Frequency with Repeated Sequence and Cyclic Prefix

作　　者：张文超[1] 曾凡鑫[1] 龙秀虹[1] 

机构地区：[1]重庆通信学院,重庆400035

出　　处：《重庆工学院学报（自然科学版）》2009年第12期62-64,76,共4页Journal of Chongqing Institute of Technology

基　　金：国家自然科学基金资助项目(60872164)

摘　　要：介绍了OFDM系统模型,提出了一种Michele Morelli算法和循环前缀相结合的频率同步新算法,经理论分析,对基于重复序列结构的几种算法性能进行仿真分析.结果显示:不论是在高斯信道还是在瑞利多径衰落信道下,所提出的算法均能得到较好的方差性能.OFDM technology has been used in various high speed wide bandwidth wireless system. However, it is more sensitive to frequency offset and time offset than the single carries system; therefore, time-frequency synchronization is the key technology in the OFDM system. A method of frequency offset estimation for OFDM systems based on document [ 4 ] is proposed in this paper. Both theoretical analysis and simulation show that the performances of the variance of the proposed method are better than the others＇ methods whether in an AWGN or in a Rayleigh channels with smaller SNR, respectively.

关 键 词：正交频分复用 频偏估计 重复序列 循环前缀 

分 类 号：TN409[电子电信—微电子学与固体电子学]