Sharing C-band Frequency Between Satellite and Terrestrial 5G Communication Systems

With the development of terrestrial 5G communication service, the C-band frequency which is exactly the frequency resources used by satellite broadcast and television will be used for the 5G low frequency ranges. In this paper, the interference caused by using the same C-band frequency resources between the satellite system and the terrestrial 5G business is analyzed. In order to solve this problem, a novel method is proposed to share the C-band which consists of frequency reverse use, frequency dual reuse, beam and polarization multiplexing. This innovative strategy can promote the integration and development of satellite broadcast business and terrestrial 5G communication, and improve the efficiency of frequency utilization simultaneously. Taking the advantage of satellite system, enhanced Mobile Broadband (eMBB) and massive Machine Type Communications (mMTC) use cases of 5G communication are suitable for the integrated satellite-terrestrial 5G system. The method described in this paper is a frequency use suggestion for satellite-terrestrial 5G, and the approval of radio management department is required for practical application.