Analysis of THz Communication in Satellite Constellation*

THz communication technology has been known as an important enabler for 6G. This paper summarizes the condition of THz research in some countries, and introduces the characters of THz communication, ultrahigh communication speed with ultra-high path loss for the same reason–the ultra-high frequency (more than 100 GHz). The THz communication is more applicable in satellite constellation for the ideal channel. This paper analyzes the problem that need to be handled before practical application, such as Doppler shift and tracking problem. We propose a typical LEO satellite constellation and analyze the performance of THz communication in multi-scenarios (intra-orbit, inter-orbit and satellite-ground). The results show that the Doppler shift and tracking problem, which THz communication being used in LEO satellite constellation may face, can be handled easily. Furthermore, the THz communication can also achieve the goal of ultra-high communication speed at a long distance.