Research on baseband signal processing for software GPS receiver
Yang Bao-ping · Electronics Optics & Control · 2007
Conventional GPS receivers provide limited user flexibility.It is necessary to have software GPS receivers for easy implementation,which can analyze,simulate and execute various algorithms rapidly.In our software receiver design,the focus is on the baseband signal processing of L1 band C/A code GPS signals.In the paper,we introduce the theory of RF front-end,the algorithms for parallel code phase search acquisition,and frequency discrimination aided tracking loop.We also present a third-order digital loop filter which is adaptive to dynamic environment.Simulation results demonstrate that the proposed algorithms can speed up the signal acquisition and tracking,and extract the navigation data bits from the original GPS signals.