There is only one reason, that is to safeguard their monopoly of the cable TV broadcast, cable TV is also receiving because communication satellite forwards the program.
原因只有一个，那就是维护他们垄断的有线电视广播，因为有线电视也是接收通信卫星转发的节目。
Satellite communication systems usually broadcast a range of traffic to various clients through several channels, thus a reasonable traffic scheduling scheme is important to the system's efficiency.
卫星通信系统通常需要将多种业务通过若干频道广播给用户，合理的业务调度方案对于系统效率具有重要意义。
Wireless communication receiver applies widely in so many areas such as wireless communication, television, broadcast, radar, satellite communications and so on.
无线通信接收机覆盖了无线电通信、电视广播、无线电广播、雷达定位、遥测遥控、卫星通信以及移动通信系统等各个领域。
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