基于周期图和自相关函数的频偏估计方法  

A Frequency Offset Estimator Based on Periodogram and Correlation Function

作　　者：李鹏[1] 何燕[1] 

机构地区：[1]西安电子科技大学信息技术系,陕西西安710071

出　　处：《电讯技术》2004年第5期107-110,共4页Telecommunication Engineering

摘　　要：提出了一种频差估计的新算法,该算法结合观测序列的周期图和自相关函数进行频率估值。仿真结果表明:对于数据辅助的MPSK信号,信噪比较低时,其估值方差仍接近克拉美劳界,且该算法计算复杂度低,易于实现。A simple algorithm for frequency offset estimation is proposed, which estimates the frequency offset with the periodogram and the correlation function of the observation samples. Computer simulation shows that in the condition of data-aided Multiple Phase Shift Keying(MPSK) with low Signal-to-Noise Ratio(SNR), its estimation accuracy is still close to the Cramer-Rao bound(CRB),and its complexity is lower ,and it is easily to be implemented.

关 键 词：频偏估计 周期图 MPSK信号 频差估计 自相关函数 行频 信噪比 计算复杂度 算法 仿真结果 

分 类 号：TN919.34[电子电信—通信与信息系统] TN958[电子电信—信息与通信工程]