Implementation And Analysis Of Two-state Land Mobile Satellite Channel Model Based On A RF GNSS Signal Simulator And Receiver

In this thesis,a two-state Land Mobile Satellite channel model is implemented and integrated to a NCS(Navigation Constellation Simulation)RF simulator to realize the function to simulate a land mobile satellite channel for a moving receiver or receivers in the simulator.Firstly the introduction to GNSS simulation is given,following a short review on the Land Mobile Satellite channel model.A detailed description on the Two-state LMS and its parameter databases are presented theoretically.The developed model is based on the ESA MiLADY LMS model,however,some modifications are made and the model is rearranged to adapt it to the real simulation situation in a NCS RF simulator.After implementation and integration,the result analysis are taken in both GSPF and NCS,showing the simulation result is realistic and the statistical results are with the expected range.Simulation results for systems:GPS,Galileo,GLONASS and BeiDou each for environment types:Urban,Suburban,Open and Forest are presented in the thesis.However,the model still has its limitations,discussion on this is presented in the end of the thesis.