The hardware-in-the-loop system architecture of GPS simulator was presented, which was flexible, expansible and capable of real rime test, and a data-collecting GPS receiver was introduced into the system. The mathematic model of high-dynamic GPS signal was derived, and it was suggested to add two parameters to emulate high-dynamic effects. The structure of the simulator software was established. A software design instance and its simulation results were given. The simulator designed can provide a realistic high-dynamic signal environment for parameters measurement, software and hardware debug, performance test and evaluation of GPS UE.
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