Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2009.770.775ZunxiongLiu ZhengXu XingleFeng ZhaoganLu 5200985In current 4G system given in recent literatures, channel
estimation overhead and complexity of Multi-User Detectors (MUD), may
lead to bad performance in fast fading channel scenarios when large number
of users exists. So, a novel 4G system with TDD/TDMA as duplex and wireless
access is designed to reduce channel estimation spending and avoid MUD,
as only one user can be active to communicate with base station. Under
the requirement of 4G systems, radio frame structure is elaborately designed
to fit for fast fading channel scenarios. The system architecture with
consideration of link adaptations for a novel eigenmodes coupled universal
space-time codes, is given and evaluated for performance of TDD/TDMA 4G
systems. Results show the proposed TDD/TDMA 4G can meet the requirement
of 4G system under the classical ITU channel profiles.]]>Bin, X., W. Jiangzhou and M. Sawahashi,2005430513062Myung-Sun, B., H.J. Kook, M.J. Kim, Y. Young-Hwan and S. Hyoung-Kyu,200551551559Zheng, K., H. Lin, W. Wenbo and Y. Guiliang,2005434552Nanda, S., R. Walton, J. Ketchum, M. Wallace and S. Howard,200543101109Ping, Z., T. Xiaofeng, Z. Jianhua, W. Ying, L. Lihua and W. Yong,2005433844Quoting, L., Y. Junxun, L. Fan and Y. Huawen,20052005pp: 4449Wang, Z., Z. Han and K.J.R. Liu,2005412071213Yang, Y. and F. Li,2006285153Zhou, Y., T.S. Ng, J. Wang, K. Higuchi and M. Sawahashi,2008463949