Abstract
In this paper, a new approach is proposed to solve the constrained optimization problem of saving grid energy and increasing safety in a simultaneous wireless information and power transfer (SWIPT) system. The traditional grid energy is combined with the renewable energy to form a hybrid energy, which provides power for the system to achieve green wireless transmission. The transfer process of SWIPT system is divided into multiple time slots. The renewable energy is harvested and stored in battery at each time slot. A multi-time-slot artificial noise-assisted transmission strategy is proposed to reduce the signal to noise ratio (SNR) of eavesdropping link. A power allocation algorithm based on multi-time-slot golden section is given, which performs one-dimensional search on the power ratio of artificial noise to determine the transmit power of source node. And then the allocation algorithm is utilized to dynamically configure the harvested renewable energy for each time slot. When the battery capacity is constant, the maximum renewable energy is being used to reduce the grid power consumption. Finally, the performances of proposed schemes are evaluated by simulations in terms of various tradeoffs.
Highlights
Exploiting new energy and transmission mode for wireless communication to reduce the grid power consumption and improve the physical layer security (PLS) is the main issue faced by the generation (5G) of mobile communication [1,2], and is considered as a problem of wide concern.Based on the above analysis, we consider a simultaneous wireless information and power transfer (SWIPT) system powered by the hybrid energy to save grid resource, and utilize artificial noise (AN)to interference eavesdropper.The SWIPT technology received extensive attention with separation of destination nodes and carrying energy transmission [3,4,5]
Step6: If there is still remaining renewable energy at rest of the time slot and pi < p peak, the remaining energy will be directly supplied to the source node of the corresponding time slot to remaining energy will be directly supplied to the source node of the corresponding time slot to transmit transmit information for information receiver (IR)
This paper considers the problems of safety and energy in a SWIPT system, in presence of
Summary
Exploiting new energy and transmission mode for wireless communication to reduce the grid power consumption and improve the physical layer security (PLS) is the main issue faced by the generation (5G) of mobile communication [1,2], and is considered as a problem of wide concern. In order to save power consumption, the paper [13] proposed the use of green renewable energy to mobile receivers in a multiple-antenna SWIPT system. Renewable energy scheme which divides time slots to allocate the dynamic renewable energy, in order to save power consumption, the paper [13] proposed the use of green renewable energyand to gave a power allocation algorithm based on two-stage filling water. The receivers obtain the renewable energy, the directional algorithm in different channel is considered to allocate the which cannot be water-filling controlled and are not always available [14,15].models. To maximize the throughput in finite time horizon These gave a power allocation algorithm based on two-stage filling water. A SWIPT model based on the renewable energy and multi-slot artificial noise-assisted node.
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