Analysis of IMT in the 1765-1785 MHz band for the coexistence of civil UAVs with broadband TDD private network systems

5G has the characteristics of ultra-high broadband, low latency reliability, wide coverage, and large connectivity, which combined with network slicing and edge computing capabilities, further expands the application scenarios of unmanned aerial vehicles (UAV). The application of UAVs combined with 5G has already taken off. However, there are many spectrum security issues. Unmanned Aerial Vehicles are under serious threat from scarce spectrum resources and insufficient bandwidth for transmitted data, posing a challenge to the use of spectrum for UAV. The Ministry of Industry and Information Technology (MIIT) has divided the international mobile telecommunications (IMT) frequencies, and the 1765-1785MHz/1860-1880MHz bands are planned for IMT systems in FDD mode. In this paper, we analyze the situation of UAV interference with neighboring frequency broadband time division dual (TDD) private network system by building an interference scenario using deterministic calculation method. After the analysis, we believe that the UAS can achieve coexistence with the neighboring frequency wideband TDD private network system.