类奈曼-皮尔逊检验加权l_p相关的干扰鲁棒同步算法

An Interference Robust Synchronization Algorithm with Neyman-Pearson-Like Test Weighted l_p-Correlation

为实现正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统的时域同步,本文利用ZC(Zadoff-Chu)序列提出了类奈曼-皮尔逊检验加权的l_p(p=1或2)相关(Neyman-Pearson-like test Weighted l_p-Correlation,l_p-NPWC)同步算法.分析表明:该算法利用类奈曼-皮尔逊检验能有效抑制多径效应对l_p相关同步的影响,特别地,当取p=1时,它对重尾分布噪声及循环前缀导致的伪峰具有极强的鲁棒性.实验及仿真结果均证明了理论分析的正确性和有效性,并表明本文算法相较于现有算法在各种干扰环境中均具有更高的同步精度和性能.

An interference robust synchronization algorithm with Neyman-Pearson-like test weighted l_p-Correlation(l_p-NPWC) for the timing synchronization of an Orthogonal Frequency Division Multiplexing(OFDM) system is presented by a Zadoff-Chu(ZC) sequence.The analytical results showthat our Neyman-Pearson-like test weighted synchronization algorithm can reduce the multipath effects on the l_pcorrelation synchronization,where p = 1 or 2.Especially,when p = 1,it is found that our algorithm is robust to the noise with a heavy-tailed distribution and fake peaks caused by a cyclic prefix.Both experiment and simulation results verify the effectiveness of analytical ones,while our algorithm is shown with higher synchronization accuracy than those of the known ones in literature.