2009•Geo-spatial Information ScienceOpen access

Model of GPS IF signal and its simulation

Jiming Guo, Wei Wang, Chao Baichong

Abstract

A GPS IF signal computer simulation method is proposed in this article. The carrier Doppler frequency and the total propagation and delay time can be modeled or calculated with the input GPS satellite ephemeris file. The simulated GPS IF signal outputs to a text file for post-processing and analysis. The simulation signal spectrum is compared with the received real GPS IF signal spectrum, and the correctness of the simulation result is verified.

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Available abstract

Key concepts: Global Positioning System, GPS signals, SIGNAL (programming language), Time to first fix, Computer science, Ephemeris, Correctness, Doppler effect