Study on Resource Optimization in Cognitive Radio System
Jingjing Bao · Communications technology · 2012
In cognitive radio system,the randomness of the primary-user activity,the time-variance of the wireless channel and the inherent limit of the hardware would lead to the errors in monitoring results of the cognitive user,and further cause the collision between the primary user and the cognitive user during the transmission time-slots.The optimization of the throughput based on OFDM(Orthogonal Frequency Division Multiplexing) cognitive radio system is studied in this paper.The optimal solution is deduced with Lagrange multiplier method,a searching algorithm based on chaos optimization is proposed,and simulation indicates its effectiveness.