一种基于AR模型的大频偏估计算法  

Large Doppler Frequency Shift Estimation Algorithm Based on AR Model

作　　者：朱爱民[1] 杨喜根[2] 单超[1] 

机构地区：[1]解放军理工大学通信工程学院研四队,江苏南京210007 [2]解放军理工大学通信工程学院卫星通信系,江苏南京210007

出　　处：《系统仿真学报》2006年第1期37-40,共4页Journal of System Simulation

摘　　要：给出了一种适用于卫星通信的大频偏估计算法,文中称之为基于AR模型的大频偏估计算法。该算法结合相应的频率跟踪算法能够在低信噪比条件下实现多普勒频移远大于符号速率的信号捕获与跟踪。同时,还给出了该算法的计算机仿真与硬件实现。结果表明,该算法实现复杂度低,频率估计的准确高,适合于一般的非连续相位调制信号。A large Doppler frequency shift estimation algorithm was proposed, which is called large Doppler frequency shift estimation algorithm based on AR model. This algorithm can capture and trace the signal with the frequency shift larger than the symbol rate under low E0/N0 when combining with proper frequency trace algorithm. Meanwhile, the computer simulation and hardware realizations of this algorithm were given, which have shown the low complexity of realization and high accuracy of frequency estimation. This algorithm also adapts to non-continuous phase modulated signal.

关 键 词：AR模型 频率捕获 频率跟踪 大频偏估计 RLS算法 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]