Optimization of Periodic Cooperative Spectrum Sensing Mechanisms

Periodic cooperative spectrum sensing mechanisms in cognitive radio(CR) networks are investigated to improve the performance of detection and the efficiency of spectrum utilization.The algorithms are proposed in different fading environment to obtain the optimal mechanism parameters such as detection duration,data transmission duration and the number of cooperative users,by adopting the ratio of effective and non-effective transmission duration as the criterion of the quality of service of secondary users.The simulation results show that the proposed scheme can increase the ratio of effective transmission duration significantly and maximize the channel efficiency for the CR users while satisfying the detection performance and interference constraints.