On the Capacity of Cognitive Radio MIMO Gaussian Broadcast Channels
The cognitive radio MIMO Gaussian broadcast channels model is proposed, and the capacity is also studied under both the cognitive users’ transmit power constraint and a set of interference power constraints at the licensed receivers. A duality technique and dirty paper coding (DPC) are used to simplify channel model where multiple antennas are available for both licensed and cognitive users in a spectrum sharing environment. Subgradient iterative power allocation (SIPA) algorithm is also used to solve the parameters of constraint in order to obtain the optimal values. Our analysis and simulation results show that the proposed channel model can be suitable for multiple cognitive users and a few of licensed users with multiple antennas.
Hai Lin Xiao Shan Ouyang
School of Information and Communication, Guilin University of Electronic Technology, Guilin, 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
24-26
2009-07-23（万方平台首次上网日期，不代表论文的发表时间）