Title :
Joint beamforming and power control optimization by second-order cone programming approximation
Author :
Hu, Chunjing ; Wang, Fanggang ; Wang, Wenbo
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In multiuser cognitive radio (CR) network, we address the problem of joint transmit beamforming (BF) and power control (PC) for secondary users (SUs) when they are allowed to transmit simultaneously with primary users (PUs). The objective is to optimize the network sum rate under the interference constraints of PUs. Second-order cone programming approximation (SOCPA) method is proposed as an effective algorithm. Typical network models are approximated to second-order cone programming problems and solved by interior-point method. Finally the network sum rates for different PU and SU numbers are assessed by simulation.
Keywords :
approximation theory; array signal processing; cognitive radio; interference (signal); multiuser channels; optimisation; power control; radio networks; interference constraints; multiuser cognitive radio network; power control optimization; primary users; second-order cone programming approximation; secondary users; transmit beamforming; Antennas; Approximation methods; Interference; Petroleum; Signal to noise ratio; Cognitive radio; beamforming; power control; second-order cone programming;
Conference_Titel :
Communication Technology (ICCT), 2010 12th IEEE International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-6868-3
DOI :
10.1109/ICCT.2010.5689310
