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一、发展短距无线通信的由来 近年来,国际上无线通信技术快速发展,以满足通信用户急剧增长的需求,越来越多的通信用户希望地球上任何人在任何地点和任何时间能够实现与对方互相满意的通信。不仅要实现传统的电话通信,还要更多地互通计算机数据信息,甚至活动的图视和彩色多媒体通信。在通信网方面,除了继续使用光纤建设广泛的有线通信网外,更加重视无线通信。无线通信领域除了
First, the development of short-range wireless communications in recent years, the rapid development of international wireless communications technology to meet the rapid growth of communications users demand, more and more communications users hope that any person on Earth at any time and place can be achieved with Each other satisfied with the communication. Not only to achieve the traditional telephone communications, but also more interoperability of computer data information, and even activities of the map and color multimedia communications. In the communications network, in addition to continuing to use optical fiber to build a wide range of wired communications networks, pay more attention to wireless communications. In addition to wireless communications