Handover technology is the key technology in UMTS, and it is absolutely necessarily in guaranteeing the subscribers moving freely in mobile communication system.
切换技术是UMTS关键技术之一，它是保证用户在移动通信网络中具有移动性的必不可少的方法。
At studying the "Connection in moving" equipments, of the satellite communication earth station, we request that the antenna system carried on the car can follow the appointed satellite very well.
在研究卫星通讯地面站的动中通设备时，要求天线系统在车载机上能很好地跟踪指定的卫星。
This paper issues a kind of Angle measuring tracking method for conical scan without hollow motor in moving carrier satellite communication system.
提出了一种在动载体卫星通信控制系统中，无需空心电机的圆锥扫描测角跟踪方案。
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