Simplified Relay Selection and Power Allocation in Cooperative Cognitive Radio Systems
Liying Li, Xiangwei Zhou, Hongbing Xu, Geoffrey Ye Li, Dandan Wang, Anthony C. K. Soong · IEEE Transactions on Wireless Communications · 2010
In this paper, we investigate joint relay selection and power allocation to maximize system throughput with limited interference to licensed (primary) users in cognitive radio (CR) systems. As these two problems are coupled together, we first develop an optimal approach based on the dual method and then propose a suboptimal approach to reduce complexity while maintaining reasonable performance. From our simulation results, the proposed approaches can increase the system throughput by over 50%.