多小区多播无线携能通信鲁棒信干噪比平衡

Robust Signal to Interference Plus Noise Ratio Balancing for Simultaneous Wireless Information and Power Transfer in Multicell Multicast Coordinated Networks

针对非理想信道多小区多播协作网络中的供能问题,提出了一种鲁棒的无线携能通信优化方案,该方案以最差用户信干噪比最大化为目标、以每用户能量采集和每小区功率为约束,在保证用户能量采集约束和系统功率预算的前提下实现最差用户服务质量最优化.为了求解优化问题,采用半定松弛和S-引理将原始问题转化为拟凸优化问题,进而采用二分迭代算法得到问题的最优解.仿真结果表明,所提系统设计正确,迭代算法收敛特性良好。

This paper proposes a robust simultaneous wireless information and power transfer optimization scheme for multicell multicast coordinated networks with imperfect channel state information.The proposed scheme aims to maximize the minimal signal to interference plus noise radio under the constraints of energy harvesting of each user and power consumption of each cell,by which the worst quality of service of users is thus optimized on condition of the energy harvesting requirement and the system power budget.To solve the problem,the original problem is reformulated to a quasi-convex problem by using semi-definite relaxation and S-Lemma,which,thereby,can be solved by bisection iterative algorithm.Simulations under different transmission parameters not only verify the correctness of the system designs,but also show good convergence properties of the iterative algorithm.