Communication the key to the evolution of 4G technology around the world with the third-generation mobile communication system being implemented gradually and the future development of mobile communications and the evolution of research has become an issue of hot spots. This paper introduces the fourth generation mobile communication system network and its performance and structure and OFDM, software radio, smart antenna, IPv6 and other key technologies, and analyzes the 4G mobile communication system and the relationship between the 3G mobile communications and the evolution of communication systems to do the Prospect.

4G移动通信系统关键技术及演进.doc

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