当前无线通信的热点和频率问题综述

Technologies of Major Interest in the Radiocommunication area and the Use of Frequencies Associated with Them

对当前无线通信中的热点问题，如无线接入系统、第三代移动通信系统、双向寻呼移动通信系统、数字集群通信系统以及蓝牙技术等，就它们对频率使用的有关问题进行了综述。

This article gives an overview of technologies of major niterest in the radiocommuniction area, such as the wireless access system, the 3G mobile communications system, the two-way paging system, the digital trunked communications system and the bluetooth technology, and the use of frequencies associated with them.