frequency multiplex造句

• The advantages of using leo satellite are as following : on the one hand the satellite orbit is low , so the transmission delay is short , the power loss is small ; on the other hand the development of cell communication , multi - access , frequency multiplex and etc also provide a technique guarantee to the leo satellite - mobile - telecommunication . so the leo system is considered to be a satellite - mobile - communication system with a great future
  低轨道卫星是一种运行于1000公里左右的高空中的人造卫星，利用leo卫星实现个人通信的优点在于：一方面卫星的轨道高度低，使得传输延时短、路径损耗小，多个卫星组成的星座可实现真正的全球覆盖，频率复用更有效：另一方面蜂窝通信、多址、点波束、频率复用等技术的发展也为低轨道卫星移动通信提供了技术保障。