Title :
On the capacity of cognitive radio MIMO Gaussian broadcast channels
Author :
Xiao, Hai Lin ; Ouyang, Shan
Author_Institution :
Sch. of Inf. & Commun., Guilin Univ. of Electron. Technol., Guilin, China
Abstract :
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 care 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.
Keywords :
Gaussian channels; MIMO communication; antenna arrays; broadcast channels; channel capacity; channel coding; cognitive radio; dual codes; frequency allocation; gradient methods; radio receivers; wireless channels; DPC; MIMO Gaussian broadcast channel capacity; cognitive radio; dirty paper coding; duality technique; interference power constraint; licensed receiver; multiple antenna; spectrum sharing environment; subgradient iterative power allocation algorithm; transmit power constraint; Analytical models; Broadcast technology; Chromium; Cognitive radio; Interference constraints; Iterative algorithms; MIMO; Radio broadcasting; Radio transmitters; Receivers;
Conference_Titel :
Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on
Conference_Location :
Milpitas, CA
Print_ISBN :
978-1-4244-4886-9
Electronic_ISBN :
978-1-4244-4888-3
DOI :
10.1109/ICCCAS.2009.5250574
