Self-Energy Recycling for RF Powered Multi-Antenna Relay Channels

Hwang, Duckdong; Hwang, Keum Cheol; Kim, Dong In; Lee, Tae-Jin

doi:10.1109/twc.2016.2630688

Cited by 31 publications

(53 citation statements)

References 44 publications

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“…In more detail, in [4] the authors discuss an energy recycling relay system with the aim of maximizing throughput. Reference [8] generalizes the work in [4] focusing on a Multiple Input Multiple Output (MIMO) relay system. The authors provide optimal power allocation strategies for downlink and joint uplink/downlink cases.…”

Section: Introductionmentioning

confidence: 95%

Optimal Power Allocation for Energy Recycling Assisted Cooperative Communications

Ropokis

Butt

Marchetti

et al. 2017

2017 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)

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Abstract-We investigate the problem of optimal power allocation for energy recycling cooperative communications systems, employing full duplex relays, based on the criterion of maximizing the rate, or equivalently the Signal to Noise Ratio (SNR), of the system. A system model is investigated where each time slot is split into an information transmission phase, during which the Source (S) transmits information to the destination (D) and a full-duplex Relay (R), and an energy harvesting phase. During the energy harvesting phase, R relays information to D, while concurrently it performs energy harvesting, exploiting a signal transmitted by S and energy recycling, exploiting its own transmission. For this system model, we formulate a rate/SNR maximization problem, in order to compute the optimal source power levels for both information transfer and energy transfer phases. The cost function of this optimization problem is then substituted by a sharp approximation, which allows for obtaining an analytically tractable power allocation. The performance of the resulting power allocation is then assessed by means of Monte Carlo simulations, and it is found that it outperforms existing solutions. It is therefore shown that our proposed solution can contribute towards increasing the range of IoT networks.

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Section: Introductionmentioning

confidence: 95%

Optimal Power Allocation for Energy Recycling Assisted Cooperative Communications

Ropokis

Butt

Marchetti

et al. 2017

2017 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)

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“…Full-duplex (FD) WPC systems are recently considered to improve spectrum efficiency [7]- [10]. In the FD WPC systems, energy and information are simultaneously transmitted over the same frequency band so that the energy transmitted from the dedicated energy source acts as an interference to the destination.…”

Section: List Of Figuresmentioning

confidence: 99%

Energy Beamforming for Full-Duplex Wireless Powered Communication in Presence of Eavesdropper

Seo¹,

Lee

2017

2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)

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To improve spectrum utilization, full duplex (FD) communication technique is applied to wireless powered communication (WPC). The cochannel interference from energy transmission reduces achievable rate of information transmission. However, when an eavesdropper tries to intercept the information in the FD WPC systems, the energy signal from the power beacon acts as a jamming signal to the eavesdropper. Hence, the secrecy rate of the system is not always degraded by the energy transmission. i In this thesis, to control the energy signal transmitted to the source and eavesdropper, we propose an optimal beamforming scheme for secure communication in a FD WPC system consists of a multi-antenna power beacon, a source, a destination, and an eavesdropper. By using the beamforming scheme, the power beacon transmits an energy signal to a source which acts as a jamming signal to an eavesdropper and the source transmits an information signal by using harvested energy. We consider a scenario that the channel state information of eavesdropper is imperfect. We formulate an optimization problem to find an optimal beamforming for maximizing worstcase secrecy rate assuming that channel state information of the wiretap channel is imperfect. Also, we propose an algorithm to solve the problem. Simulation results show the secrecy performance of FD WPC system with the proposed beamforming scheme.

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“…This means that TS-based SWIPT scheme is more applicable to UE than PS-based SWIPT scheme since the structure of UE needs to be simple. TS-based SWIPT systems with S-ER were studied in [13][14][15]. In [13], Zeng and Zhang proposed the beamformer design to maximize end-to-end throughput in multiple-input single-output (MISO) relay system.…”

Section: Introductionmentioning

confidence: 99%

“…Ding et al proposed the beamforming scheme of multiple-input multiple-output (MIMO) relay for rate maximization where relay harvests SI in the second phase [14]. In [15], Hwang et al proposed the beamformers of BS and relay where relay has additional antenna to harvest SI. The FD SWIPT system with S-ER is also helpful to device-to-device (D2D) communication for Internet of Thing (IoT) system-the communication between mobile phone and devices which cannot have sufficient battery.…”

Section: Introductionmentioning

confidence: 99%

A full-duplex SWIPT system with self-energy recycling to minimize energy consumption

Lee

2018

J Wireless Com Network

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In simultaneous wireless information and power transfer system (SWIPT), additional resource allocation for power transfer degrades system performance. Therefore, how to allocate power and time to data transmission and energy transfer is very important for the performance of time switching-based SWTPT system. In this paper, we propose a time switching-based full-duplex SWIPT system combined with self-energy recycling since self-interference harvesting is more efficient than simultaneous data transmission if the magnitude of self-interference is sufficiently large. Proposed system has additional self-energy recycling phases compared to the conventional time switching-based full-duplex SWIPT system. Considering the limitation of maximum transmission power, proposed system is optimized transmission time as well as power. For the validity of the proposed system, we show the bi-convexity of proposed system and propose an iterative algorithm for optimization of proposed system. In simulations, we compare proposed system with the half-duplex system without simultaneous data transmission phase and the full-duplex system without self-energy recycling phase. Simulation results show proposed system consume less energy than the conventional systems.

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Self-Energy Recycling for RF Powered Multi-Antenna Relay Channels

Cited by 31 publications

References 44 publications

Optimal Power Allocation for Energy Recycling Assisted Cooperative Communications

Optimal Power Allocation for Energy Recycling Assisted Cooperative Communications

Energy Beamforming for Full-Duplex Wireless Powered Communication in Presence of Eavesdropper

A full-duplex SWIPT system with self-energy recycling to minimize energy consumption

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