Adaptive TF-domain Spread MC-CDMA System in Frequency-Selective Rayleigh Fading Channels
In this paper, an adaptive time-frequency domain (TF-domain) spread multicarrier code-division multiple-access (MC-CDMA) system is considered for application in downlink of cellular radio network over frequency selective fading channels. In the proposed system, the overall system spreading factor (SF), defined as the product of the T-domain SF and F-domain SF, is fixed but can be dynamically allocated to F-domain and T-domain according to the number of active users. It is shown in this paper that one can achieve a tradeoff between the multiple access interference (MAI) level and frequency diversity gain by adaptively adjusting the Tand F-domain SFs, thus resulting optimum bit error rate (BER) performance.
Li Hao Pingzhi Fan
School of Info.Science & Technol.Southwest Jiaotong University Chengdu, Sichuan 610031, China
国际会议
2006年IEEE信息理论国际会议(Proceedings of 2006 IEEE Information Theory Workshop ITW06)
成都
英文
687-691
2006-10-22（万方平台首次上网日期，不代表论文的发表时间）