双模手机的发展、技术与机遇

移动通信从2G发展到3G,由于标准众多,不同标准的网络产生了不同制式的移动终端。用同一个手机实现在不同的网络漫游切换的想法由来已久,基于此双模手机的概念也越来越多地被人提及,文章讨论了双模手机产生的背景、双模手机系统的网络结构和软件无线电在其中的应用,并根据当前双模手机的发展状况进一步阐述了双模手机的发展趋势。

The Development, Technology and Chance of Dual Mode Cellphone

With the development of mobile communication from 2G to 3G, terminals with different modes are produced to adapt to networks with different standards. The idea that one phone is used to roam and switch in different networks has been brought forward for a long time. Therefore, dual mode cellphone is now referred more and more .This paper discusses the background and the system structure of dual mode cellphone and Its applications in software defined radio. Finally, the development trend is explained in the light of the current situation.