高动态扩频信号捕获的多普勒补偿

Research on Doppler Compensation in Acquisition of High Dynamic Spread Spectrum Signals

分析了多普勒效应对扩频信号捕获的影响,介绍了对载波多普勒和伪码多普勒频率的补偿方法,研究了对于多普勒变化率的补偿方法,并对该方法进行了相应的仿真。仿真结果表明,引入补偿之后,能够有效减少多普勒频移和变化率对于扩频信号捕获的影响,提高捕获门限。

Doppler effect influencing on acquisition of spread spectrum signal in high dynamic is analysed, compensation method of carrier Doppler and code Doppler is introduced. A compensation method of carrier Doppler frequency change rate is presented and simulated. Simulation results show compensation method can eliminate the influence signal acquisition aroused by Doppler frequency and change rate. It can im- prove threshold of acquisition.