GPS Digital IF Signal Simulation
Yang Wen-ping · Journal of Shanxi Datong University · 2012
This article studies the basic principle of the generation of digital intermediate frequency signal in GPS software receiver.Firstly,introduce the modulation process of GPS signal,secondly,analyze the principle about C/A and process of signal digitization.Thirdly,discusses the noise,which exists in GPS signal,so as simulation process of GPS digital intermediate frequency signal.Finally,according to different situations,simulation experiments are made respectively on the GPS digital intermediate frequency signal spectrum.The simulation results show that:the spectrum is quite accurate;the modulation process can be seen from the graph,as well as carrier frequency.Come to the conclusion that this is a very important basic theory for the further research.