【摘要】 无线电通信是下一个世纪的主要接入技术，无线网络除了提供语音服务之外，还提供多媒体和高速数据业务。本文介绍了第３ 代国际移动通信系统ＩＭＴ－２０００ 和无线异步转移模式（ＷＡＴＭ）的概念，对它们的关键技术进行了总结，并对其发展方向作了进一步的展望更多还原

【Abstract】 Wireless communication is expected to be a dominant mode of access technology in the next century. Besides voice, a new range of services such asmultimedia, highspeed data, etc. are being offered for delivery over wireless networks. This paper introduces some concepts of the third international mobile communications IMT 2000 and wireless asynchronous transfer mode WATM, summarizes their key technologies, and expounds their perspective of the next millennium.更多还原