Simulation model implementation of GPS IF signal generator

摘要

In this paper, a simulation model of digital intermediate frequency (IF) GPS signal is presented. This design is developed based on mathematical mode representing the digitized IF GPS signal includes C/A code, navigation data and P code, and the noise which can set some initial configurations simultaneously. Simulation results show that the simulated signals have the same properties with real signals (e.g. C/A code correlation properties, the spread spectrum). The simulated IF GPS signal data can work as input for various signal processing algorithm of GPS receivers, such as acquisition, tracking, carrier-to-noise ratio (C/No) estimation.