4G Mobile Communication Systems: Key Technology and Evolution
  With the worldwide third-generation mobile communication system gradually implemented, the future development of mobile communications has become a hot topic and evolution of the problem. This paper introduces the fourth generation mobile communication system and its performance and network structure and OFDM, software defined radio, smart antennas, IPv6 and other key technologies, and analyzes the relationship between 4G mobile communication system for mobile communications and 3G, and the evolution of communication systems do Prospect. 
Seyed Hossein Ahmadpanah, Abdullah Jafari Chashmi, Majidreza Yadollahi
cs.NI