Optimal Resource Allocation of Cognitive Radio Systems Based on Spatial Multiuser Access
This paper investigates the problem of resource allocation in spatial multiuser access cognitive OFDM (Orthogonal Frequency Division Multiplexing) systems. The objective is to maximize the cognitive users’ weighted rate sum, which is constrained by the licensed users’ (LU) interference temperatures. The spatial multiuser access using singular value decomposition (MU-SVD) model is introduced to the cognitive radio (CR) networks application to provide the multi-antenna gain and the spatial multiple access in frequency subchannels of diverse users. In addition, three schemes based on different receiver structures are used to solve the nonlinear and non convex problem. The results show that using spatial decorrelators can formulate the problem into a convex one and provide impressive throughput of the cognitive system.
Xiao Fu Jun Wang Shao Qian Li
National Key Laboratory of Communication University of Electronic Science and technology of China Chengdu, Sichuan, China
国际会议
2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)
成都
英文
68-72
2009-07-23（万方平台首次上网日期，不代表论文的发表时间）