摘要
该算法通过联合多个正交频分复用(OFDM)符号对定时同步参数进行估计。该算法不需要额外的数据辅助,主要利用接收信号循环前缀的相关性,通过计算接收信号的联合相关函数,并利用搜索其峰值来实现OFDM信号的定时同步。该算法分为定时粗估计和定时细估计,利用定时细估计能精确进行OFDM信号的定时同步。仿真结果表明该算法在低信噪情况下估计精度较高,适合实际信号的应用。
An algorithm for the parameter estimation of timing synchronization of Orthogonal Frequency Division Multiplexing（OFDM） signals is proposed by combining several OFDM symbols.The algorithm needs no training data.By utilizing the correlation of cyclic prefix of received signal and finding the peak value of the combined correlation function,the timing synchronization for OFDM signal is obtained.The algorithm includes rough estimation and exact estimation.The exact estimation can find the timing Synchronization of OFDM signals.Simulation results show that the proposed algorithm has high estimation accuracy and can be applied in the synchronization of actual signals.
出处
《通信技术》
2011年第5期12-14,18,共4页
Communications Technology
关键词
联合相关
同步
循环前缀
OFDM信号
combined correlation
synchronization
cyclic prefix
OFDM signals
