An Extraction Method for Multipath Signals of GPS Based on Correlation Function

GPS signals received are very weak and susceptible to various interference or jamming, which make it difficult for the extraction of interference or jamming from the received signals. After the analysis of correlation function of GPS C/A code, an extraction method for the multipath signals is presented. With the single reflection multipath model, the influence of multipath on correlation function of C/A code is analyzed, and method of wavelet transform is used to extract multipath signals from the received GPS signals. Results show that multipath signals have obvious impact on correlation function and can be extracted efficiently by the method provided in the paper.