Research on Markov Channel Model Based on Beidou B1 Signal

In this paper, the research on satellite channel modeling of the B1 signal within the Beidou Global Navigation System(BDS) is carried out. Considering the crucial influence of satellite channel characteristics on the performance of the Beidou system, a satellite channel model for the BDS is established with respect to three typical geographical scenarios, namely open regions, rural areas, and urban areas. Specifically, the generalized Rice model, the improved C.Loo model, and the extended Suzuki model are applied correspondingly. Meanwhile, a three-state Markov model is incorporated to depict the time-varying features of the channel induced by the movement of the receiver. Through comparison with measured data and analysis of statistical characteristic functions, the usability of the constructed model is verified. The simulation outcomes indicate that this model can more accurately represent the channel characteristics of the Beidou satellite. The simulation results indicate that this model is capable of precisely representing the channel characteristics of the Beidou satellites. This will offer research methodologies for constructing an accurate satellite model for the Beidou signal, enhancing the positioning accuracy of the BDS, strengthening the anti-interference capacity of the signal, and expanding the application domains.