一种新的PCC-OFDM盲时偏估计算法  

A new blind estimation of time offset for PCC-OFDM

作　　者：唐恬[1] 曲仁慧[2] 张平[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876 [2]吉林大学,吉林长春130012

出　　处：《电路与系统学报》2008年第4期29-32,共4页Journal of Circuits and Systems

基　　金：国家自然基金项目(60496312)

摘　　要：提出了一种新的PCC-OFDM盲时偏估计算法,首先使时域信号包络与窗函数循环卷积,进行时偏快速粗估计,然后利用解调信号方差进行判决,获得精确的时偏估计。该算法不需要训练序列、导频信号或循环前缀。仿真结果证明,该算法估计精度高于已有的PCC-OFDM盲时偏估计算法。A new algorithm of blind estimation of time offset is proposed for PCC-OFDM is carried out. Fast coarse estimation of time offset based on circular convolution of the signal envelop and the window function first. Then the variance of decoded signal is used to obtain the accurate estimation. No training symbols, pilot or cyclic prefix extensions are required. Simulation results show the improved precision of the proposed algorithm compared with existed algorithms.

关 键 词：多项式相消编码OFDM 盲估计 时偏 

分 类 号：TN929.5[电子电信—通信与信息系统]