The Interference And Coexistence Study Of The IMT-2020 System To The Satellite Fixed Service

With the rapid development of mobile communication technology,it brings not only the improvement of network service capability,but also a large number of spectrum resource requirements.Therefore,the IMT-2020 System will seek to achieve hotspot coverage in high-frequency bands.At this stage,a lot of space services have been deployed in the high frequency band.Therefore,relevant standards organizations both at home and abroad are studying the coexistence of interference between the IMT-2020 system and other systems in order to strive for more spectrum resources.This paper came from the major project of National Science and Technology "IMT-2020 Candidate Band Analysis And Evaluation".This article mainly considers the interference and coexistence study of the IMT-2020 system to FSS in the 24.25-27.5 GHz and 37-42.5 GHz band.This dissertation first reviews the coexistence of inter-system interference,and combs the basic principles and methods of coexistence research.It also introduces the IMT-2020 and FSS spectrum partitioning and key technologies,respectively,focusing on the analysis of the present study about interference and coexistence of the IMT-2020 System and FSS.This paper is mainly about interference problem of the IMT-2020 system to the FSS in the same frequency.It designs and implements the system-level interference coexistence simulation platform for different system coexistence scenarios,topologies and system models,simulating the interference process of the IMT-2020 system to the uplink or downlink of FSS to obtain the results under different scenarios.The interference coexistence of the IMT-2020 system against the uplink of the FSS mainly considers the interference of the IMT-2020 system base stations and terminals to FSS high altitude satellite.The research results show that the aggregated interference value of the IMT-2020 system to the FSS uplink in the 24.25-27.5 GHz band is within the requirements of the interference protection criterion and has a large interference margin.For the interference coexistence of the IMT-2020 system to the FSS downlink,it is about the base stations and terminals of the IMT-2020 system to FSS satellite Earth station.The research results show that the isolation distance of 1.2km in the 37-42.5 GHz frequency band can meet the requirements of the interference protection criterion,and the interference margin is large.