滤波多音系统盲载波频偏估计算法  

Blind Carrier Frequency-Offset Estimation for FMT Systems

作　　者：王长青[1] 彭华[1] 张洋[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2016年第2期184-189,共6页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(61072046);河南省基础与前沿计划资助项目(132300410049)

摘　　要：针对现有算法估计范围较小的问题,提出了一种基于接收端两倍过采样的盲载波频偏估计算法,算法利用两倍过采样接收信号的自相关函数对频偏进行估计。理论分析和仿真表明,与现有算法相比,文章算法估计范围较大且不需要已知滤波器参数。并且,还具有对定时偏差不敏感,适用于严格采样滤波多音系统等优点。In order to expand estimation range of carrier frequency offset,a blind CFO estimator based on time twice oversampling is proposed. It utilizes the auto-correlation function of oversampled signal sequence to estimate CFO. Simulation results illustrate that the estimator can estimate not only the fraction frequency offset but also the integer frequency offset. Moreover,it can work without knowledge of the filter parameters. Especially,it is adapted to critically sampled FMT and robust to symbol timing offset.

关 键 词：滤波多音 盲载波频偏估计 两倍过采样 自相关函数 

分 类 号：TN911[电子电信—通信与信息系统]