How to design an efficient transmission system according to the asymmetry of uplink and downlink has become a key issue in future mobile communications systems.
如何针对上、下行链路的非对称特性设计高效的传输系统已经成为未来移动通信系统的一个关键问题。
They are used with fielded mobile communications systems during high mobility operations.
该套装置可用于高移动作战的战场移动通信系统。
Mobile station, equipment for connection to mobile station, switching systems in mobile communications systems and mobile communications systems.
移动通信系统中的移动站，连接到移动站的设备，交换系统，以及移动通信系统。
The third generation mobile communications systems have the advantage of large capacity, low consumed power, fine voice quality and confidentiality.
第三代移动通信系统具有容量大，功耗低，通话质量高和保密性好等优点。
The third generation mobile communications systems have the advantage of large capacity, low consumed power, fine voice quality and confidentiality.
第三代移动通信系统具有容量大，功耗低，通话质量高和保密性好等优点。
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