基于能量收集的多用户OFDM中继网络资源分配研究
首发时间:2020-04-01
摘要:无线携能通信(SWIPT)是近年来的研究热点。本文考虑一个具有能量收集的多用户双向正交频分复用(OFDM)中继网络。根据源和中继的约束以及源能量收集约束的联合优化,构建了目标为最大系统速率的联合源和中继资源分配优化问题模型。该优化问题属于混合整数规划类型,本文通过将优化问题转化为两个阶段进行求解,首先,采用一种启发式的多载波分组算法,通过三个步骤进行求解,同时,采用对功率分配进行优化的迭代收敛算法,以求得局部最优解。最终在MATLAB平台进行仿真,仿真结果显示论文中提出的联合优化方案有较大的系统性能提升。
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Research on Resource Allocation of Multi-user OFDM Relay Network Based on Energy Harvesting
Abstract:Simultaneous wireless information and power transfer(SWIPT) is a research hotspot in recent years. This paper considers a multi-user orthogonal frequency division multiplexing(OFDM) two-way relay network with energy harvesting. According to the joint optimization of source and relay constraints and source energy collection constraints, a joint source and relay resource allocation optimization problem model with a maximum system rate is constructed. This optimization problem belongs to the type of mixed integer programming. In this paper, the optimization problem is converted into two stages to solve. First, a heuristic multi-carrier grouping algorithm is used to solve the problem in three steps. At the same time, an iterative convergence algorithm that optimizes power allocation is used to obtain a local optimal solution.Finally, the simulation was performed on the MATLAB platform. The simulation results show that the joint optimization scheme proposed in the paper has a greater system performance improvement.?????
Keywords: energy harvesting multi-carrier grouping Orthogonal Frequency Division Multiplexing
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