Research on Doppler Frequency-shift Estimation of GPS

In the satellite navigation and positioning system,Doppler frequency-shift is the key problems that degrade the performance of satellite receiver.To overcome the influence of Doppler frequency-shift and improve the speed of GPS signal acquisition,the paper first studies the algorithm of Doppler frequency-shift estimation,and then deduces the mathematic models of satellite movement paremeters and Doppler frequency-shift estimation.Finally,the algorithm models are simulated in MATLAB simulation environment.The result shows the relative position between the satellite and the receiver has a relatively strong effect on the characteristic of Doppler frequency-shift which can be used for estimation and compensation of Doppler frequency-shift.