Research on Doppler characteristics of inter-satellite-links in Beidou-based Space Information Network

Concepts and characteristics of Space Information Network (SIN) is introduced in this paper. The idea that Beidou global navigation constellation is the promising backbone network of SIN is proposed. Aiming at this constellation, this paper probes into Doppler characteristics of inter satellite links (ISLs) between two satellites located in different orbit plants, including Doppler frequency-shift, Doppler velocity and Doppler acceleration. Analysis and simulation results show that the less the phase difference, the less the distance of ISLs, but the severer the Doppler characteristic. Based on the conclusion, a compromised topology with good Doppler performance is acquired.