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Throughput analysis and optimization of wireless-powered multiple antenna full-duplex relay systems

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journal contribution
posted on 24.11.2016, 14:17 authored by Mohammadali Mohammadi, Batu K. Chalise, Himal A. Suraweera, Caijun Zhong, Gan Zheng, Ioannis Krikidis
© 2016 IEEE.We consider a full-duplex (FD) decode-and-forward system in which the time-switching protocol is employed by the multiantenna relay to receive energy from the source and transmit information to the destination. The instantaneous throughput is maximized by optimizing receive and transmit beamformers at the relay and the time-split parameter. We study both optimum and suboptimum schemes. The reformulated problem in the optimum scheme achieves closed-form solutions in terms of transmit beamformer for some scenarios. In other scenarios, the optimization problem is formulated as a semidefinite relaxation problem and a rank-one optimum solution is always guaranteed. In the suboptimum schemes, the beamformers are obtained using maximum ratio combining, zero-forcing, and maximum ratio transmission. When beamformers have closed-form solutions, the achievable instantaneous and delay-constrained throughput are analytically characterized. Our results reveal that beamforming increases both the energy harvesting and loop interference suppression capabilities at the FD relay.Moreover, simulation results demonstrate that the choice of the linear processing scheme as well as the time-split plays a critical role in determining the FD gains.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Transactions on Communications

Volume

64

Issue

4

Pages

1769 - 1785

Citation

MOHAMMADI, M. ...et al., 2016. Throughput analysis and optimization of wireless-powered multiple antenna full-duplex relay systems. IEEE Transactions on Communications, 64(4), pp. 1769-1785.

Publisher

© IEEE

Version

AM (Accepted Manuscript)

Acceptance date

22/02/2016

Publication date

2016-02-11

Copyright date

2016

Notes

© IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

ISSN

0090-6778

Language

en