Distributed Energy Beamforming for Simultaneous Wireless Information and Power Transfer in the Two-Way Relay Channel

Fang, Zhaoxi; Yuan, Xiaojun; Wang, Xin

doi:10.1109/lsp.2014.2365718

Cited by 67 publications

(46 citation statements)

References 12 publications

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“…These splitting methods are investigated in cooperative networks with one-way relaying (OWR) protocols [11,[16][17][18][19]24,26] and with two-way relaying (TWR) protocols [12,13,15,23,25]. Here, amplify-and-forward (AF) relays are adopted in [11][12][13]15,24] for a lower complexity with the simple relay operation amplifying the received signal without information decoding, while decode-and-forward (DF) relays are adopted in [16][17][18][19]23,25] for a better performance with the complicated relay operation regenerating the relay signal after decoding the received signal.…”

Section: Related Workmentioning

confidence: 99%

“…For the TWR protocol, the SWIPT methods are combined with the spectrally efficient two-phase protocols composed of multiple access (MAC) and broadcasting (BC) phases [12,13,23,25]; an exception is observed in [15], which incorporates the PS-SWIPT and the TS-SWIPT into the four-phase TWR for an easier modification in spite of a large loss in the spectral efficiency. As in the OWR protocol, the outage probability and ergodic capacity are analyzed for the AF-TWR protocol employing the PS-SWIPT [12].…”

Section: Related Workmentioning

confidence: 99%

“…In particular, various relaying protocols have been rebuilt to support energy harvesting devices in cooperative networks [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], where relays can be categorized into either energy harvesting nodes or energy transmission nodes. Energy harvesting relays are as low in complexity as communicating devices and harvest the energy in helping the data exchange of the devices in general [11][12][13][14][15][16][17][18][19][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…Energy harvesting relays are as low in complexity as communicating devices and harvest the energy in helping the data exchange of the devices in general [11][12][13][14][15][16][17][18][19][23][24][25][26]. On the other hand, energy transmission relays are as highly complex as base stations so that the relays transfer the power and information to the communicating devices [20][21][22]; the relays even employ massive antennas to leverage the efficiency in the power and information transfer at a high cost in implementation [27,28].…”

Section: Introductionmentioning

confidence: 99%

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Rate Optimization of Two-Way Relaying with Wireless Information and Power Transfer

2017

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Abstract:We consider the simultaneous wireless information and power transfer in two-phase decode-and-forward two-way relaying networks, where a relay harvests the energy from the signal to be relayed through either power splitting or time splitting. Here, we formulate the resource allocation problems optimizing the time-phase and signal splitting ratios to maximize the sum rate of the two communicating devices. The joint optimization problems are shown to be convex for both the power splitting and time splitting approaches after some transformation if required to be solvable with an existing solver. To lower the computational complexity, we also present the suboptimal methods optimizing the splitting ratio for the fixed time-phase and derive a closed-form solution for the suboptimal method based on the power splitting. The results demonstrate that the power splitting approaches outperform their time splitting counterparts and the suboptimal power splitting approach provides a performance close to the optimal one while reducing the complexity significantly.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rate Optimization of Two-Way Relaying with Wireless Information and Power Transfer

2017

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“…The idea of the SWIPT scheme was first proposed in [9], and since then, it has been extended to wireless relay networks [10][11][12][13][14][15][16][17][18]. For the one-way single-antenna relay channel, time switching (TS) was proposed for AF relay networks in [10] and power splitting (PS) was proposed for DF relaying networks in [11].…”

Section: Introductionmentioning

confidence: 99%

Secrecy in Wireless Information and Power Transfer for One-Way and Two-Way Untrusted Relaying with Friendly Jamming

Xiao

Zhang

Xue

et al. 2017

Mobile Information Systems

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An untrusted relay system combined with a simultaneous wireless information and power transfer (SWIPT) scheme is considered in one-way and two-way relaying transmission strategies. In the system, two source nodes can only communicate with each other via an untrusted energy harvesting relay node, which sends the message by using its harvested energy from the source nodes. Specifically, we classify the intermediate relay as an eavesdropper into two modes: active eavesdropper and nonactive eavesdropper, depending on whether it has sufficient energy of its own to transmit the message or not. Under a simplified three-node fading wiretap channel setup, the transmit power allocation and power splitting ratio are jointly optimized to minimize the outage probability in the delay-sensitive case and to maximize the average rate in the delay-insensitive case, subject to the average and peak total power constraints. Applying the dual-decomposition method, the optimization problem can be efficiently solved in the delay-sensitive scenario. Moreover, an iterative algorithm is proposed to derive the solution to maximize the average rate in the delay-insensitive scenario. Numerical results demonstrate the performance of system outage probability in the two modes versus different rates and how efficiently the secrecy rate is improved compared with traditional schemes.

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Wireless‐Powered Cooperative Relay Networks

Maso

Zhong

Zhou

et al. 2017

Wiley Encyclopedia of Electrical and Electronics Engineering

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A cooperative communication network consisting of a source, a destination, and one or multiple relays serves as a primary building block useful to implement practical wireless systems. On the other hand, limited battery life of mobile terminals adversely affects the performance of wireless communication systems. As a contemporary development, significant advances made in wireless power transfer (WPT) and energy harvesting techniques offer effective solutions to replenish energy and prolong the network operation. In this context, envisioning the combination of WPT and relay nodes seems to open up the promising prospect of building a network with larger throughput, wider coverage, and quasiperpetual operation. In this article, we present an overview of the contemporary results on system analysis, optimization, and hardware design aspects of wireless‐powered cooperative relay networks. Further, we highlight key research challenges that requires the attention of research community and system designers so that implementation of such networks becomes a reality in the near future.

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Distributed Energy Beamforming for Simultaneous Wireless Information and Power Transfer in the Two-Way Relay Channel

Cited by 67 publications

References 12 publications

Rate Optimization of Two-Way Relaying with Wireless Information and Power Transfer

Rate Optimization of Two-Way Relaying with Wireless Information and Power Transfer

Secrecy in Wireless Information and Power Transfer for One-Way and Two-Way Untrusted Relaying with Friendly Jamming

Wireless‐Powered Cooperative Relay Networks

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