基于功率分配器的大规模信息能量同传系统吞吐率优化

发布时间：2018-01-14 07:31

本文关键词：基于功率分配器的大规模信息能量同传系统吞吐率优化　出处：《厦门大学学报(自然科学版)》2017年02期 　论文类型：期刊论文

【摘要】：研究了基于下行无线信息和能量协同传输(simultaneous wireless-information and power-transfer,SWIPT)大规模多输入单输出(multiple-input and single-output,MISO)系统的吞吐率优化问题.该系统为时分双工(time division duplex,TDD)模式,同时移动站采用先收集后传输的协议.在下行信噪比(signal-to-noise ratio,SNR)和移动站的传输功率约束下,为实现上行吞吐率的最大化,对功率分配系数和下行传输时间进行了联合优化,由于该问题为非凸优化问题,采用基于拉格朗日乘子的梯度算法进行优化.最后,通过与单独优化下行传输时间算法的比较,验证了该联合优化算法的优越性.
[Abstract]:The cooperative transmission of wireless information and energy based on downlink. Simultaneous wireless-information and power-transfer. Large scale multiple-input and single-output. The system is time-division duplex division duplex mode. At the same time, the mobile station adopts the protocol of collecting first and then transmitting. Under the downlink signal-to-noise ratio (SNR) and the transmission power constraints of the mobile station. In order to maximize the uplink throughput, the power allocation coefficient and downlink transmission time are jointly optimized because the problem is a non-convex optimization problem. The gradient algorithm based on Lagrange multiplier is used to optimize the algorithm. Finally, the superiority of the joint optimization algorithm is verified by comparing with the single optimal downlink transmission time algorithm.
【作者单位】：厦门大学信息科学与技术学院;
【基金】：国家自然科学基金(61271241,61001073) 欧盟第七研发框架计划(FP7)(294923)
【分类号】：TN929.5
【正文快照】： 近年来,随着无线应用的快速发展,为了解决无线设备能量受限问题,无线能量传输(wireless energytransfer,WET)获得了工业界和学术界等众多领域的关注[1-2].例如,WET能延长传感节点和一些植入人体内的设备的使用寿命[3].目前,WET通常实现的方式是电磁波辐射方式,而辐射性的电磁

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