高精度OFDM整数频偏与符号同步频域联合估计算法  

Precise Frequency-Domain Joint Estimation of Integer Carrier Frequency Offset and Symbol Synchronization

作　　者：侯华俊[1] 吴斌[1] 黑勇[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《现代电子技术》2009年第13期93-96,共4页Modern Electronics Technique

基　　金：中国科学院知识创新工程领域前沿项目(5408SF032001)

摘　　要：针对OFDM载波同步中符号定时误差会严重影响传统整数倍频偏估计算法性能的问题,提出一种高精度整数倍频偏及符号细同步的频域联合估计算法。该算法通过将发送端经圆周移位及差分调制的频域训练序列与接收端经差分调制的频域训练序列做互相关,能够同时进行整数倍频偏的估计以及符号细同步。经在多径信道条件下仿真结果的验证,该算法能达到很高的估计精度。To solve the problem that integer carrier frequency offset estimation earl be seriously affected by symbol timing offset, an efficient frequency - domain synchronization method to jointly estimate integer carrier frequency offset and fine sym bol timing is presented. This method performs cross - correlate between the differentially modulated and circularly shifted transmitted and the differentially modulated received preambles in frequency domain, and can estimation integer carrier frequency offset and fine symbol timing offset simultaneously. Simulation over multi - path channel proves that this method can get precise results.

关 键 词：正交频分复用 频率同步 整数倍频偏 符号同步 

分 类 号：TN929.5[电子电信—通信与信息系统]