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

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.