一种基于时域相关的OFDM时域参数盲估计方法

文中针对多载波通信系统均采用添加循环前缀的方法来消除ISI和ICI的特点，提出一种基于时域相关的OFDM信号时域参数的盲估计算法。该算法利用循环前缀中的数据与对应OFDM符号尾部数据的相关性以及与其他数据的近似独立性，实现对OFDM符号周期及有效长度等时域参数进行估计。理论分析和仿真结果表明，该算法无需信号的先验知识，在低信噪比下具有很好的估计性能。

Blind Estimation of Time Parameter in OFDM Systems

For that the data in the cyclic prefix OFDM symbol is the tail of the copy data, this paper proposes a time-domain algorithm based on the OFDM signal time-domain parameters of the Blind estimates. The proposed algorithm requires no prior knowledge of the OFDM signal, this is conducive to receive communications equipment. The theoretical analysis and simulation results have proved the effectiveness of the algorithm.