认知无线电网络中多目标频谱分配与功率控制

he problem of power control in cognitive radio networks based on Underlay access method is studied, and two factors of spectrum allocation and power control are considered simultaneously. In order to meet the multiple needs of network users at the same time, this paper addresses the spectrum allocation and power control with respect to optimizing both power consumption efficiency and network capacity in cognitive radio networks. Then an improved multi-objective optimization algorithm based on NSGA-II is proposed to solve the problem, and the optimal set of Pareto solutions suitable for different users is obtained. Finally, the proposed method is compared with the SPEA-II algorithm, and the simulation results validate that the proposed strategy can harvest the optimal solutions efficiently and satisfy the requirements of spectrum allocation and power control in various cases.