Next Article in Journal
Asynchronous Fault Location in Transmission Lines Considering Accurate Variation of the Ground-Mode Traveling Wave Velocity
Next Article in Special Issue
Energy Efficiency and Network Performance: A Reality Check in SDN-Based 5G Systems
Previous Article in Journal
Study and Optimization of Design Parameters in Water Loop Heat Pump Systems for Office Buildings in the Iberian Peninsula
Previous Article in Special Issue
An Efficient Energy Saving Scheme for Base Stations in 5G Networks with Separated Data and Control Planes Using Particle Swarm Optimization
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle
Energies 2017, 10(12), 1953; doi:10.3390/en10121953

Energy-Efficient Subcarrier Pairing and Power Allocation for DF Relay Networks with an Eavesdropper

1
IDCOM, School of Engineering, University of Edinburgh, Edinburgh EH9 3JL, UK
2
Department of Communication Engineering, National Central University, Taoyuan 32001, Taiwan
*
Author to whom correspondence should be addressed.
Received: 13 October 2017 / Revised: 13 November 2017 / Accepted: 17 November 2017 / Published: 24 November 2017
(This article belongs to the Special Issue Energy-Efficient Computing and Networking in the 5G Era)
View Full-Text   |   Download PDF [298 KB, uploaded 24 November 2017]   |  

Abstract

Algorithms for joint subcarrier pairing and power allocation are investigated in order to maximize the worst-case energy efficiency (EE) in dual-hop decode-and-forward (DF) relay networks in the presence of an active eavesdropper. Accordingly, we study the impact of number of subcarriers on the trade-off in performance between the EE and the spectrum efficiency (SE). The formulated EE optimization problem is the ratio of the secure SE over the entire power consumption in the network, subject to the constraints of total transmit power and subcarrier pairing. A near-optimal iterative algorithm is proposed to perform the subcarrier pairing and power allocation for achieving the maximum EE in the networks. Furthermore, a suboptimal algorithm is proposed with two-step resource allocation. By considering the subcarrier channel quality of the source-to-relay and relay-to-destination links, the subcarrier pairing is first performed, followed by an energy-efficient iterative power allocation scheme to maximize the EE. Numerical results validate the effectiveness and correctness of the proposed algorithms. View Full-Text
Keywords: power allocation; subcarrier pairing; decode-and-forward; energy efficiency; eavesdropper; relay networks power allocation; subcarrier pairing; decode-and-forward; energy efficiency; eavesdropper; relay networks
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Singh, K.; Ku, M.-L.; Biswas, S.; Ratnarajah, T. Energy-Efficient Subcarrier Pairing and Power Allocation for DF Relay Networks with an Eavesdropper. Energies 2017, 10, 1953.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top