基于FFT的突发通信载波大频偏估计算法  

Carrier large frequency offset estimation algorithm based on FFT for burst mode communication

作　　者：董孝东[1] 

机构地区：[1]中国电子科技集团公司第十研究所,四川成都610036

出　　处：《现代电子技术》2013年第1期51-53,共3页Modern Electronics Technique

摘　　要：针对数据辅助的突发通信载波大频偏估计,提出了一种基于FFT的频偏估计算法。通过本地训练序列与接收信号滑窗去调制,再经过FFT运算,搜索最大值输出的滑窗位置作为同步判决,同时根据FFT最大值位置进行频偏估计。对性能进行了仿真分析,64个符号估计能在Es/N0=-1 dB条件下,正确估计出载波频偏,并且频偏估计范围与符号速率无关。针对工程实现,给出了简化算法。A carrier large frequency offset estimation algorithm based on FFT is proposed for data-aided burst communica-tion. The basic idea is to firstly remove modulation in received signal using loacal training sequence, to search maximum value po-sition in the slip window for synchronization through FFT calculation and estimate carrier frequency offset. The simulation analy-sis show that the algorithm can accurately estimate the carrier frequency offset with 64 symbols even when EdNo is as low as-1 dB, and its estimation range is independent of the symbol rate. The simplified algorithm is given for engineering implementation.

关 键 词：突发通信 频偏估计 FFT 训练序列 

分 类 号：TN919-34[电子电信—通信与信息系统]