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

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...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2017-03, Vol.17 (3), p.654
Main Authors: Aquino, Guilherme Pedro, Guimarães, Dayan Adionel, Mendes, Luciano Leonel, Pimenta, Tales Cleber
Format: Article
Language:English
Subjects:
bandwidth efficiency
censoring
Cognitive radio
Computer simulation
cooperative spectrum sensing
Distortion
Energy efficiency
fusion of sensor information
Power efficiency
pre-distortion
Spectrum allocation
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Summary: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.
ISSN:1424-8220
1424-8220
DOI:10.3390/s17030654