1背景介绍十几年来,南京禄口机场在为进离港飞机的安全、有序、正点运行保障中,800 MHz模拟集群通信系统发挥了重要的作用,已经成为机场公司、航空公司、空管、航油、海关、公安、消防等诸多驻场单位高度依赖的生产协调、调度通信手段。系统频率资源的严重不足同用户数量大量增加的矛 1 Background Introduction For more than a decade, Nanjing Lukou Airport has played an important role in the safe, orderly and punctual operation of incoming departure aircraft. The 800 MHz analog trunked communications system has become an important part of airport companies, airlines, air traffic control , Aviation fuel, customs, public security, fire and many other units highly dependent on the production coordination and dispatching means of communication. A serious shortage of system frequency resources with a substantial increase in the number of users spear