Reaserch On The Interference Of IMT-2020 System To Other Systems In The Frequency Band 3-6GHz

With the update of wireless communication technology,especially the emergence of the Fourth Generation Mobile Communication Technology(4G),IMT develops rapidly.In order to seize the opportunity to deploy 5G system,IMT-2020(5G)Propulsion Group was set up in 2013 to organize domestic forces to jointly promote the formulation and frequency planning of 5G standards.Across the frequency division of major countries and re-gions in the world,the frequency band below 6GHz has become a consen-sus to meet the needs of 5G network coverage and capacity.And this band is expected to become the first frequency band for 5G system to be used.This paper mainly studies the interference of 5G system to the other sys-tems,and provides suggestions for 5G frequency planning in China,which is of great significance for accelerating the planning of 5G frequency.This paper is based on the China United Network Communications Corp Network Technology Research Institute "The Technical Service Pro-ject of the Simulation Platform for Interference in 5G Frequency Band ".This paper mainly studies the interference of IMT-2020 system de-ployed on the bands of 3300-3600MHz?4400-4500MHz and 4800-5000MHz to Fixed Satellite System(space to earth)?Aeronautical Mobile System?Aeronautical Radio Navigation System and Radio Astronomy System.The isolation distance or isolation degree for deploying the IMT-2020 system is obtained by the deterministic analysis and Monte Carlo simulation for studying interference of different systems.The main work of the paper is as follows:First of all,summarize the IMT-2020 system by analyzing the current situation of key technology of IMT-2020 ande frequency planning.To make the content of interference clear by summarizing the IMT-2020 sys-tem and the other systems in the band of 3-6GHz.The research methods of inter system interference in wireless communication are reviewed,the ad-vantages and disadvantages of different interference research methods are analyzed,the research method of paper interference is explicitly defined,and the interference research method combining deterministic analysis with simulation analysis is adopted.Then,to make the process of deterministic analysis clear.In the de-terministic analysis process,extracte the common characterristics in the different interference systems,and according to its characteristics,the in-terference situations are analyzed concretely.Specific analysis of the inter-ference conditions using the deterministic analysis method to complete all relevant system interference research.The results of deterministic analysis will be used as a reference for the simulation analysis and as the upper limit of interference.Finally,to make the simulation analysis method clear which is using semi dynamic system simulation method.Refer to the IMT simulation plat-form to build 5G band inter system interference simulation platform.To make the simulation process of different interference system clear.Uusing the simulation platform,combined with the characteristics of interference system to simulation and analysis the interference between different sys-tems.The interference simulation results are compared with the determin-istic analysis results to verify each other.This paper presents the 3300-3600MHz,4400-4500MHz and 4800-5000MHz band as 5G spectrum that has been submitted to the Ministry of Industry and Information Technology,the Radio Authority,by IMT-2020(5G)Group.It is of great significance to our country in 5G frequency plan?ning and 5G device index set.