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Sensors 2017, 17(3), 654; doi:10.3390/s17030654

Combined Pre-Distortion and Censoring for Bandwidth-Efficient and Energy-Efficient Fusion of Spectrum Sensing Information

1
National Institute of Telecommunications–Inatel, Av. João de Camargo, 510, 37540-000 Santa Rita do Sapucaí, Brazil
2
Federal University of Itajubá–Unifei, Av. BPS, 1303, 37500-903 Itajubá, Brazil
*
Author to whom correspondence should be addressed.
Academic Editors: Francisco Javier Falcone Lanas, Ana Alejos and Leyre Azpilicueta
Received: 13 January 2017 / Revised: 23 February 2017 / Accepted: 14 March 2017 / Published: 22 March 2017
(This article belongs to the Special Issue Cognitive Radio Sensing and Sensor Networks)
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Abstract

This paper describes a novel scheme for the fusion of spectrum sensing information in cooperative spectrum sensing for cognitive radio applications. The scheme combines a spectrum-efficient, pre-distortion-based fusion strategy with an energy-efficient censoring-based fusion strategy to achieve the combined effect of reduction in bandwidth and power consumption during the transmissions of the local decisions to the fusion center. Expressions for computing the key performance metrics of the spectrum sensing of the proposed scheme are derived and validated by means of computer simulations. An extensive analysis of the overall energy efficiency is made, along with comparisons with reference strategies proposed in the literature. It is demonstrated that the proposed fusion scheme can outperform the energy efficiency attained by these reference strategies. Moreover, it attains approximately the same global decision performance of the best among these strategies. View Full-Text
Keywords: bandwidth efficiency; censoring; cognitive radio; cooperative spectrum sensing; energy efficiency; fusion of sensor information; pre-distortion bandwidth efficiency; censoring; cognitive radio; cooperative spectrum sensing; energy efficiency; fusion of sensor information; pre-distortion
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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).

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Aquino, G.P.; Guimarães, D.A.; Mendes, L.L.; Pimenta, T.C. Combined Pre-Distortion and Censoring for Bandwidth-Efficient and Energy-Efficient Fusion of Spectrum Sensing Information. Sensors 2017, 17, 654.

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