基于信号周期平稳特性的OFDM系统时频参数盲估计算法  

A Cyclostationarity-Based Blind Algorithm for Estimating Time-Frequency Parameters in OFDM Systems

作　　者：郭里婷[1] 朱近康[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系个人通信与扩频实验室,合肥230027

出　　处：《电子与信息学报》2006年第9期1706-1709,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(0649314);教育部博士点基金资助课题

摘　　要：该文考虑移动通信信道下的OFDM系统同步参数估计问题,通过对接收信号进行采样,获得具有周期平稳特性的序列,在此基础上提出一种基于OFDM信号周期平稳特性的系统时延和频偏盲估计算法,并对算法进行时频参数估计范围和误差来源分析。理论分析和仿真结果表明,该算法不仅适用于频率选择性衰落信道,而且与同类的方法比较,具有更大的频偏估计范围和更高的估计精度。The problem on the time-frequency parameters estimation in the mobile channel is considered in this paper. For this aim, a blind algorithm is proposed, which is based on the cyclostationarity property of the received signal. Theoralic analysis and simulation results are provided to show that this algorithm is suitable for a frequency selective fading channel. When compared with the other method, its ability to estimate a larger frequency offset and higher estimation resolution are shown.

关 键 词：OFDM 周期平稳特性 盲时频参数估计 

分 类 号：TN929.5[电子电信—通信与信息系统]