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《Electronics Optics & Control》 2007-01
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Research on baseband signal processing for software GPS receiver

TANG Bin1,DONG Xu-rong1,YANG Bao-ping2(1.Navigation Research Center,Academy of Equipment Command & Technology,Beijing 101416,China;2.No.63891 Unit of PLA,Luoyang 471003,China)  
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.
【CateGory Index】: P228.4
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