多用户无线供电通信网络中基于最大加权和速率的优化方案

An Optimization Scheme with Weighted Sum-Rate Maximization for Multi-User Wireless Powered Communication Networks

针对多用户无线供电通信网络系统中的交叉耦合干扰问题,提出了一种基于时间反演技术联合优化上、下行时间分配和功率分配方案,以最大化上行加权和速率.利用时间反演特有的空时聚焦性抑制交叉耦合干扰;然后建立优化模型,将难以求解的加权和速率问题转化为最小均方误差问题;最后通过分级逐次优化变量,分别求出功率和时间的最优解.仿真结果表明,在引入时间反演技术抑制系统的交叉耦合干扰后,系统的平均加权和速率明显提升.

A jointly optimize time and power allocation in uplink and downlink scheme combined with time reversal technique is proposed to solve the cross-link interference problem in multi-user wireless powered communication networks and maximize the uplink weighted sum-rate. Using the unique timespace focusing of time reversal to suppress the cross-link interference firstly,an optimization model is then established,thus the non-convex weighted sum-rate problem transformed into weighted minimum mean square error problem is solved. The optimal solution of power and time can be obtained separately by grading optimize variables sequentially. Simulations show that the system average sum-rate significantly improved after introducing the time reversal technique to suppress the cross-link interference.