Profit maximization in wireless powered communications with improved non-linear energy conversion and storage efficiencies

Shi, Liqin; Zhao, Liqiang; Liang, Kai; Chu, Xiaoli; Wu, Gang; Chen, Hsiao‐Hwa

doi:10.1109/icc.2017.7997317

Cited by 23 publications

(27 citation statements)

References 9 publications

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“…In order to accurately model the nonlinear behavior of the practical EH circuit, several realistic nonlinear EH models have been suggested and studied in the recent literature [4]- [9]. Among the various nonlinear EH models, the nonlinear model used in [8], [9] is mathematically tractable and is shown to accurately match the experimental results [9, Fig. 2].…”

Section: A Linear and Nonlinear Energy Harvestingmentioning

confidence: 99%

“…2]. In this paper, for accuracy, practicality, and tractability of the analysis with useful insights, we adopt the nonlinear model of [8], [9]. In this nonlinear model, the amount of harvested energy is modeled based on the piecewise linear function as follows:…”

Section: A Linear and Nonlinear Energy Harvestingmentioning

confidence: 99%

“…Simultaneous wireless information and power transfer (SWIPT) using radio frequency (RF) signals has been extensively studied in the literature [1]- [9]. In the most existing works on the SWIPT including [1]- [3], it was assumed that the amount of harvested energy linearly increases indefinitely with the input RF power of the energy harvesting (EH) circuit, namely, the linear EH model.…”

Section: Introductionmentioning

confidence: 99%

“…Very recently, to overcome the critical limitations of the linear EH model and to address the practicality issue of nonlinear EH, the SWIPT was studied for the realistic nonlinear EH models [4]- [9]. Among the various nonlinearity issues for EH, the most critical issue for the performance is the nonlinearity due to the saturation, because it severely limits the amount of harvested energy and the energy conversion efficiency of the EH circuit.…”

Section: Introductionmentioning

confidence: 99%

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Joint Tx Power Allocation and Rx Power Splitting for SWIPT System With Multiple Nonlinear Energy Harvesting Circuits

Kang

Kim

2019

IEEE Wireless Commun. Lett.

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We study the joint transmit (Tx) power allocation and receive (Rx) power splitting for simultaneous wireless information and power transfer (SWIPT). Considering the practical scenario of nonlinear energy harvesting (EH), we adopt the realistic nonlinear EH model for analysis. To address the critical nonlinearity issue due to the saturation, we propose to use multiple EH circuits in parallel. An important problem is to maximize the achievable rate by jointly optimizing Tx power allocation and Rx power splitting, which is a nonconvex problem. In this paper, we first derive the optimal solution for any number of EH circuits. Then we study how the number of EH circuits required to avoid the saturation should be determined. From the obtained results, we draw useful and interesting insights into the SWIPT system with nonlinear EH. Numerical results demonstrate that employing multiple EH circuits substantially enhances the SWIPT performance with nonlinear EH.

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Section: A Linear and Nonlinear Energy Harvestingmentioning

confidence: 99%

Section: A Linear and Nonlinear Energy Harvestingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Joint Tx Power Allocation and Rx Power Splitting for SWIPT System With Multiple Nonlinear Energy Harvesting Circuits

Kang

Kim

2019

IEEE Wireless Commun. Lett.

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“…For the energy harvesting, we employ a more practical piecewise linear EH model [7], [17] and the harvested power P i H from i can be computed as…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency Maximization for SWIPT Enabled Two-Way DF Relaying

Shi

et al. 2019

IEEE Signal Process. Lett.

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This paper focuses on the design of an optimal resource allocation scheme to maximize the energy efficiency (EE) in a simultaneous wireless information and power transfer (SWIPT) enabled two-way decode-and-forward (DF) relay network under a non-linear energy harvesting model. In particular, we formulate an optimization problem by jointly optimizing the transmit powers of two source nodes, the power-splitting (PS) ratios of the relay, and the time for the source-relay transmission, under multiple constraints including the transmit power constraints at sources and the minimum rate requirement. Although the formulated problem is non-convex, an iterative algorithm is developed to obtain the optimal resource allocation. Simulation results verify the proposed algorithm and show that the designed resource allocation scheme is superior to other benchmark schemes in terms of EE.

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Power allocation schemes for wireless powered NOMA systems with imperfect CSI: An application in multiple antenna–based relay

Nguyen

2018

Int J Communication

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The simultaneous wireless information and power transfer or energy harvesting (EH) can be combined in nonorthogonal multiple access (NOMA) as green applications towards 5G. This paper investigates a new cooperative EH-NOMA protocol, where the intermediate relay has not equipped the fixed power source and acts as a wireless powered relay to help signal transmission to representative weak user and strong user in NOMA. However, impacts of imperfect channel estimation contribute to outage system performance evaluations. We formulate the power resource assignment paradigms as two schemes, namely, fixed power allocation and dynamic power allocation, by considering imperfect channel state information (CSI). To solve this problem, we derive the closed-form expressions of outage probability under imperfect CSI and the power allocation constraints. The expected numerical results related to the derived expressions for the outage probability are examined that numerical and the Monte Carlo simulations are strictly matching lines. KEYWORDS energy harvesting, imperfect channel state information, NOMA, outage probability Int J Commun Syst. 2018;31:e3789.wileyonlinelibrary.com/journal/dac

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Profit maximization in wireless powered communications with improved non-linear energy conversion and storage efficiencies

Cited by 23 publications

References 9 publications

Joint Tx Power Allocation and Rx Power Splitting for SWIPT System With Multiple Nonlinear Energy Harvesting Circuits

Joint Tx Power Allocation and Rx Power Splitting for SWIPT System With Multiple Nonlinear Energy Harvesting Circuits

Energy Efficiency Maximization for SWIPT Enabled Two-Way DF Relaying

Power allocation schemes for wireless powered NOMA systems with imperfect CSI: An application in multiple antenna–based relay

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