Beamforming for Cognitive Radio Networks under Outage Probability Constraints
Tang Liang-jun · Beijing Youdian Xueyuan xuebao · 2011
The transmit beamforming algorithm design of cognitive radio(CR) network is studied.In order to guarantee the quality of service,the optimization is formulated to minimize the CR network transmit power under the constraint of outage probability at the CR users and primary users.Simulations show that with the knowledge of assumed statistical distribution of channel covariance error at the transmitter,this scheme can effectively minimize the transmit power of each CR user,enhance the CR network performance and decrease the interference to primary user.