High Dynamic GPS Signal Analysis and Acquisition Algorithm

摘要

GPS satellite signal acquisition is based on the correlation characteristics of C/A codes. This paper introduces two important properties of C/A codes, and analyzes the impact of Doppler shift on the received signal in case of high dynamic environment. FFT-based parallel code phase search acquisition algorithm is introduced and a new algorithm is presented to improve the FFT and IFFT modules by translating N points FFT and IFFT into 2 points of M groups. And simulation results are shown in MATLAB of the improved algorithm.