文档介绍：无线电通信的发展历程及未来无线电通信的发展趋势
刘玉华
摘要：无线电通信给社会的发展、人们的生活带来巨大的影响。早在七十年 代，人们开始研究无线电通信。无线电通信与有线电通信相比。具有不用架设传 输线路线、脱离传输距离限制、传输距离远、通信灵活等优点，以及光纤技术、 无线技术、多媒体技术、同步数字系列(SDH)、异步转换模式(ATM)、软件技术 等以这些新技术为基础建造我们的信息基础结构，将把人类社会推进到信息时 代。本文就无线电的优缺点进行分析，探讨了未来无线电通信的发展趋势。
关键词：无线电通信，通信技术，发展趋势
Development of radio communication and the development trend of future wireless communication
Liu Yu-hua
School of Beilie Engineering & Technology. LanZhou City University
LanZhou .. China
Abstract： Radio communication to the development of society and people* s lives have a huge impact. Back in the seventies, people began to study the radio communications. In contrast with the wired electronic communication, radio communication has not set up a transmission line cable, from the distance constraints, transmission distance, communication and flexible benefits, and fiber optic technology, wireless technology, multimedia technology, synchronous digital hierarchy (SDH), Asynchronous Transfer Mode (ATM), software technology to these new Our technology-based information infrastructure construction, human society will advance to the information age. This article analyzes the advantages and disadvantages of radio, and explore the future development trend of radio communications
Key words： Radio communication； Communications technology； Trend
1引言
无线电是信息社会的关键元素。人类自发现无线电一个多世纪