稳健的OFDM系统载波频率捕获算法  

Robust carrier frequency acquisition algorithm for OFDM systems

作　　者：何波[1] 李军[2] 林家儒[3] 吴伟陵[3] 

机构地区：[1]山东大学信息科学与工程学院,山东济南250100 [2]山东轻工业学院信控学院,山东济南250000 [3]北京邮电大学信息学院,北京100876

出　　处：《电路与系统学报》2006年第6期30-34,共5页Journal of Circuits and Systems

基　　金：国家自然科学基金项目(60372099);863项目(2001AA123016)

摘　　要：本文提出了一种新的应用于OFDM系统的载波频偏捕获算法。算法利用训练帧结构的循环重复性特点,剥离信道的影响和定时偏差的影响,完成频偏的捕获。同时本文算法训练帧既可以在时域添加,也可以在频域添加,增加了算法的灵活性。仿真结果表明,算法具有稳健,精度较高,计算量较少等优点。This paper presents a new carrier frequency acquisition algorithm for OFDM systems, which builds communication process quickly and reliably using only one training frame. Frequency offset is captured by utilizing the repetition structure of training frame and eliminating the channel impulse response influence and the time error influence. The characteristic facilitate system disposal that synchronization frame can be placed not only in time domain but also in frequency domain. The simulation results show that the algorithm is robust, and precise with low computation cost.

关 键 词：OFDM 定时估计 频偏捕获 训练帧 

分 类 号：TN919.3[电子电信—通信与信息系统]