Sum-Rate Enhancement in Multiuser MIMO Decode-and-Forward Relay Broadcasting Channel With Energy Harvesting Relays

Benkhelifa, Fatma; Salem, Ahmed; Alouini, Mohamed‐Slim

doi:10.1109/jsac.2016.2611878

Cited by 22 publications

(27 citation statements)

References 25 publications

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“…Therefore, lots of works focused on SWIPT-enabled WSN and IoT systems. For example, SWIPT was employed in multi-hop relaying networks in [6], [7] for WSNs and also was applied to charge wireless medical sensors in [8], [9] for IoTs.…”

Section: Introductionmentioning

confidence: 99%

Global Energy Efficiency in Secure MISO SWIPT Systems With Non-Linear Power-Splitting EH Model

Xiong

Fan

et al. 2019

IEEE J. Select. Areas Commun.

107

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This paper considers a MISO simultaneous wireless information and power transfer (SWIPT) system where one transmitter serves multiple authorized receivers in presence of several potential eavesdroppers (idle receivers). To guarantee secure transmission, artificial noise (AN) is embedded into the transmit signals. The non-linear energy harvesting (EH) model is adopted and a novel power-splitting (PS) EH receiver architecture is proposed. The stochastic uncertainty channel model (SUM) is considered for the idle receivers due to outdated channel feedback. A global energy efficiency (GEE) maximization problem is formulated by jointly optimizing the transmit beamforming vectors and the AN covariance matrix at the transmitter and the PS ratios at idle receivers, under the minimal rate requirement and the secure transmission constraints of authorized receivers, the EH requirement constraints of idle receivers and the total available power constraint at the transmitter. To solve the nonconvex optimization problem, an efficient solving approach is presented. Firstly, the PS ratios are optimized by using bisection method and successive convex approximation (SCA). Then, an iterative solution framework based on Dinkelbach's algorithm is presented to jointly optimize the transmit beamforming vectors and the AN covariance matrix, where a SCA-based algorithm is designed to solve its non-convex subproblem. It is theoretically proved that by involving the AN, the system GEE can be improved. Numerous results show that the system GEE first increases and then keeps unchanged with the increment of the total available power, and it first keeps unchanged and then decreases with the increment of the minimal rate requirement. It is also observed that compared with traditional EH receiver architecture and linear EH model, the proposed PS EH receiver architecture is able to achieve higher system GEE and avoid false output power at idle receivers.

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Section: Introductionmentioning

confidence: 99%

Global Energy Efficiency in Secure MISO SWIPT Systems With Non-Linear Power-Splitting EH Model

Xiong

Fan

et al. 2019

IEEE J. Select. Areas Commun.

107

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“…Motivated by the above discussion, we study a multi-pair wireless-powered relaying system, where a multiple-antenna DF relay receives both information and energy from source nodes in the first phase and then utilizes the energy to forward the information to destination nodes in the second phase. Contrary to the previous works on SWIPT-based relay networks [2], [5]- [7], this letter poses the following completely new issues: (i) A novel PSR architecture-enabled ACC is proposed by leveraging charge-recycling theory, which aims at using the EH more efficiently due to its low-power consumption and no conversion loss; (ii) Successive interference cancellation (SIC) technique is adopted at the information decoding (ID) receiver [12], which is capable of improving both spectral efficiency and user fairness. We consider a new problem of max-min endto-end (e2e) rate among user pairs under a practical model of EH circuit [13], which is formulated as a non-convex program.…”

Section: Introductionmentioning

confidence: 85%

“…To this end, simultaneous wireless information and power transfer (SWIPT) technique is an effective means to realize both energy harvesting (EH) and information decoding from the transmitted radio-frequency (RF) signals, prolonging the network lifetime of relays [2]- [4]. Various SWIPT-based relay schemes based on time-switching relaying (TSR) and power-splitting relaying (PSR) have been proposed, including multiple-input multiple-output (MIMO) DF relay [5], self interference-aided EH relaying [6], and relays with interference alignment [7]. The common approach in the aforementioned works is that the EH power circuit converts the harvested alternating current (AC) power to direct current (DC) power to assist user data transmission and activate basic functions (i.e., operating circuits and computational blocks).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Rate Fairness in Multi-Pair Wireless-Powered Relaying Systems

Bui

Nguyen

et al. 2020

IEEE Commun. Lett.

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This letter considers a multi-pair decode-andforward relay network where a power-splitting (PS) protocol is adopted at the energy-constrained relay to provide simultaneous wireless information and energy harvesting (EH). To achieve higher efficiency of EH, we propose a new PS-based EH architecture at the relay by incorporating an alternating current (AC) computing logic, which is employed to directly use the wirelessly harvested AC energy for computational blocks. Under a nonlinear EH circuit, our goal is to maximize the fairness of end-to-end rate among user pairs subject to power constraints, resulting in a nonconvex problem. We propose an iterative algorithm to achieve a suboptimal and efficient solution to this challenging problem by leveraging the inner approximation framework. Numerical results demonstrate that the proposed algorithm outperforms the traditional direct current computing and other baseline schemes.Index Terms-Inner approximation, relay network, simultaneous wireless information and power transfer (SWIPT).

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“…In [16], the authors investigated a secure EH-enabled relay design to minimize the relay power consumption.It should be noted that most of these works focus on PS scheme. On the other hand, time switching (TS) is another feasible way to coordinate EH and information decoding (ID) due to simplicity [17][18][19][20][21]. Specifically,in [17], the authors compared the performances of PS and TS methods in EH-enabled…”

mentioning

confidence: 99%

“…relay networks. In [18], the authors investigated the sum rate performance in multiuser EH-enabled relay networks. Recently, in [19], the authors proposed a new EH relaying protocol, where the source also harvested energy from the relay.…”

mentioning

confidence: 99%

Secrecy Sustainable Transmission Design in Energy Harvesting Enable Relay Networks

Kong¹,

Zhou²,

Liu³

2019

PIER M

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In this paper, we investigate the secrecy design in a sustainable relay network, where the relay is energy harvesting enabled and utilizes time switching to harvest wireless power. Specifically, assuming half-duplex amplify-and-forward relaying, we investigate the worst-case secrecy rate maximization by jointly designing the relay beamforming matrix, artificial noise covariance, and the time switching ratio. However, the formulated problem is highly non-convex due to the secrecy rate function and the dynamic relay transmit power constraint. By decoupling the original problem, we propose a two-layer optimization algorithm, where the outer problem is solved by two-dimensional search while the inner problem is solved by semi-definite relaxation. Numerical results show the effectiveness of the proposed scheme. INTRODUCTIONRecently, a newly emerging absorber, named as metamaterial absorber (MA), has aroused great attention [1][2][3]. Specifically, the multi-band, broad-band, and tunable MAs were investigated in [1,2], and [3], respectively. Based on amount of theoretically analysis and experiment data, the authors obtained several promising conclusions about MA. The progress in MA makes a new technique named energy harvesting (EH) become more practical, which is considered as one of the most effective approaches for improving the energy efficiency of wireless networks [4]. Since relay is commonly an energy-constrained node, it is critical to require ambient energy supply for supporting transmission in relay networks [5].Recently, there has been a urgent concern about EH-enabled relay, e.g., the relay can harvest energy from the ambient radio frequency (RF) signal [6]. Specifically, in [7], the authors investigated a novel full duplex wireless-powered relay with self-energy recycling scheme. In [8], the authors investigated the relay beamforming (BF) and power splitting (PS) for EH-enabled amplify-and-forward (AF) relay networks. In [9], the authors investigated the joint power control and energy transfer scheme in EHenabled AF relay networks. In [10], taking into account imperfect channel state information (CSI), the authors proposed a robust BF and PS scheme.On the other hand, due the complex communication environment and the openness of wireless channels, the security issues of relay networks are facing severe challenges [11]. The physical layer security (PLS) technique, which utilizes the features of wireless channel to improve the security, has been proved to be an effective way [12]. Specifically,[13][14][15], the authors investigated secure EHenabled relay methods to maximize the achievable secrecy rate. In [16], the authors investigated a secure EH-enabled relay design to minimize the relay power consumption.It should be noted that most of these works focus on PS scheme. On the other hand, time switching (TS) is another feasible way to coordinate EH and information decoding (ID) due to simplicity [17][18][19][20][21]. Specifically,in [17], the authors compared the performances of PS and TS methods in EH-enabled

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Sum-Rate Enhancement in Multiuser MIMO Decode-and-Forward Relay Broadcasting Channel With Energy Harvesting Relays

Cited by 22 publications

References 25 publications

Global Energy Efficiency in Secure MISO SWIPT Systems With Non-Linear Power-Splitting EH Model

Global Energy Efficiency in Secure MISO SWIPT Systems With Non-Linear Power-Splitting EH Model

Optimization of Rate Fairness in Multi-Pair Wireless-Powered Relaying Systems

Secrecy Sustainable Transmission Design in Energy Harvesting Enable Relay Networks

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