双向携能通信网络中子载波和功率联合分配

在正交频分复用技术和双向通信下,研究了携能通信网络中的资源分配问题。提出了一种面向子载波和传输功率的联合分配算法,该算法不依赖于现有的功率分割或时隙切换机制,可以在不同的子载波上分别传输信息和能量,简化了携能机制设计;此外,考虑到实际能量收集电路的饱和特性,该算法基于非线性能量采集模型,采用拉格朗日对偶和次梯度方法,研究了在满足用户传输速率阈值的前提下使系统的总能耗最小化的问题,降低网络能量开销。数值仿真实验证实了此联合分配算法的有效性和能量高效性。

Joint subcarrier and power allocation in OFDM SWIPT based two-way communication networks

This paper investigated the resource allocation problem of the simultaneous wireless information and power transfer(SWIPT)two-way communication networks based on orthogonal frequency division multiplexing,and proposed a joint subcarrier and power allocation(JSPA)algorithm,which was neither dependent upon the power splitting nor the time switching schemes and simplified the design of SWIPT principles,transfers information and energy using different subcarriers.Considering the saturation characteristic of actual energy harvesting circuit,the JSPA algorithm,which was developed by using Lagrange dual and subgradient methods and thus was based on the nonlinear energy harvesting model,was formulated to minimize the energy consumption of networks under condition that satisfied the required rate of the destination.The numerical simulation results validate both the JSPA algorithm’s effectiveness in the joint allocation of network resources and its high energy efficiency.