基于FFT和卡尔曼滤波器的载波同步方法的研究

以QPSK信号为基础,提出一种新的全数字开环载波恢复方法.该方法用快速傅立叶变化(FFT)搜索峰值估计频偏,用卡尔曼滤波器追踪相位.其优点是复杂度低,在硬件上易于实现.仿真结果显示该方法对大频偏和低信噪比信号载波同步的实现有良好的性能.

Carrier Synchronization Method Based on FFT and Kalman Filter

In this paper,a new open-loop all-digital carrier recovery method for Multiple Phase Shift Keying(MPSK) which is based on random data modulation is presented.This method uses Fast Fourier Transform(FFT) along with peak detection to estimate frequency offset and uses Kalman filter to track phase.Its complexity is very low,and it is also easily implemented with digital hardware.The simulation results show that the estimator using this method achieves good performance under the condition of large frequency off...