A Novel Sub-carrier and Power Joint Allocation Algorithm for Multi-user Cognitive OFDM

摘要：

Mathematical model of multi-user power control and resource allocation in cognitive OFDM system is investigated. Multi-user resource allocation with the target of maximizing the cognitive users transmission rate and satisfying the proportional rate constraint between cognitive users is proposed in the condition of primary users interference constraint. The paper supposes that cognitive transmitter obtains all cognitive users instantaneous transmission channel and interference channel state information by the channel side information and cognitive users cooperation. Hence, cognitive transmitters utilize these channel information to implement sub-carrier and power joint allocation. Sub-carrier allocation is implemented by sub-carrier efficiency function, while linear water-filling scheme is used in power allocation. Meanwhile, an average interference algorithm that do not need iterate is also proposed, which earns the approximate optimal gains and has some real-time features.

关键词： Cognitive OFDM Sub-carrire Efficiency Function Linear Water-filling Scheme Average Interference Algorithm Computational Complexity

作者: Dawei Sun Baoyu Zheng

作者单位: Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing, P.R.China

会议类型: 国际会议

会议名称: 2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)

会议地点: 北京

会议语种:英文

页码: 1458-1462

在线出版日期: 2010-08-24（万方平台首次上网日期，不代表论文的发表时间）