实现SWIPT的多跳MIMO系统的联合波束赋形矩阵优化设计
首发时间:2017-12-15
摘要:本文研究了一个实现了无线携能(SWIPT)技术的多跳中继无线多输入多输出(MIMO)通信系统,系统中目的节点部署了功率分配(PS)接收机来实现无线携能,功率分配接收机可以将接收到的信号同时用于信息解码和能量采集。本文建立了一个服从于传输功率约束和能量采集约束的最大化最大信息速率的优化问题,其中各节点的波束赋形矩阵是该问题的优化变量。由于建立的问题是一个非凸问题,本文主要应用了基于对角化算法的交替迭代方案来对优化问题进行转换求解。在仿真结果部分主要展示了最大信息速率的系统性能指标及算法收敛效果。
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Joint Source and Relay Beamforming Design in Multi-Hop MIMO Systems with SWIPT
Abstract:We study a multi-hop wireless MIMO system which implements simultaneous wireless information and power transfer.In the system, the power splitting receiver is applied to the destination node,which can split the received signal into two parts for information decoding and energy harvesting, respectively.In this paper, we establish an optimization problem that maximizes the maximum information rate subject to transmission power constraints and energy harvesting constraints.The beamforming matrices of the nodes are the optimal variables of the problem.Since the problem is a non-convex problem, we mainly use the alternative iterative scheme based on the diagonalizationalgorithm to solve the optimization problem.The numerical results show the performance of the system and the convergence of the scheme.
Keywords: wireless communication technique multi-hop power splitting energy harvesting
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实现SWIPT的多跳MIMO系统的联合波束赋形矩阵优化设计
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