Sensors, Vol. 23, Pages 5117: Resource Allocation for a Secure SWIPT Network Based on a Quantitative Energy Harvesting Mechanism

Sensors, Vol. 23, Pages 5117: Resource Allocation for a Secure SWIPT Network Based on a Quantitative Energy Harvesting Mechanism Sensors doi: 10.3390/s23115117 Authors: Long Zhu Liang Xue Xuan Gong Chunjie Wang Simultaneous wireless information and power transfer (SWIPT) technology can effectively extend the lifecycle of energy-constrained networks. In order to improve the energy harvesting (EH) efficiency and network performance in secure SWIPT networks, this paper studies the resource allocation problem based on the quantitative EH mechanism in the secure SWIPT network. Based on a quantitative EH mechanism and nonlinear EH model, a quantified power-splitting (QPS) receiver architecture is designed. This architecture is applied in the multiuser multi-input single-output secure SWIPT network. With the goal of maximizing the network throughput, the optimization problem model is established under the conditions of meeting the legal user’s signal-to-interference-plus-noise ratio (SINR), EH requirements, the total transmit power of the base station, and the security SINR threshold constraints. Due to the coupling of variables, the problem is a nonconvex optimization problem. To deal with the nonconvex optimization problem, a hierarchical optimization method is adopted. Firstly, an optimization algorithm based on the optimal received power of EH circuit is proposed, and a power mapping table is constructed through the optimization algorithm, from which ...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research