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Artificial neural network design for improved spectrum sensing in cognitive radio

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Abstract

Dynamic Spectrum Access/Cognitive Radio systems access the channel in an opportunistic, non-interfering manner with the primary network. These systems utilize spectrum sensing techniques to sense the occupancy of the primary user. In this paper, an artificial neural network based hybrid spectrum sensing technique is proposed, which considers sensing as a binary classification problem to detect whether the primary user is idle or busy. The proposed scheme utilizes energy detection and likelihood ratio test statistic as features to train the neural network. Moreover, we demonstrate the impact of hyperparameter tuning and carry out the detailed study of it, yielding a combination of best-suited hyperparameters. The performance of the proposed sensing scheme is validated on primary signals of various real world radio technologies acquired with an empirical testbed setup. We conclude that the best performing configuration results in an increase of approximately 63% in detection performance compared to classical energy detection and improved energy detection sensing schemes when averaged over all the radio technologies considered in this work.

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Acknowledgements

Results in parts were published in proceedings of IEEE PIMRC conference, held in September 2017 at Montreal, Canada [38]. The authors would like to thank financial support received from UKIERI under the DST Thematic Partnership 2016-17 (ref. DST/INT/UK/P-150/2016). The authors also thank Ahmedabad University and University of Liverpool for infrastructure support.

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Authors and Affiliations

  1. School of Engineering and Applied Science, Ahmedabad University, Ahmedabad, India

    Dhaval K. Patel & Brijesh Soni

  2. Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, UK

    Miguel López-Benítez & Ángel F. García-Fernández

  3. ARIES Research Centre, Antonio de Nebrija University, Madrid, Spain

    Miguel López-Benítez & Ángel F. García-Fernández

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  1. Dhaval K. Patel
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  2. Miguel López-Benítez
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  4. Ángel F. García-Fernández
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Correspondence to Brijesh Soni.

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Patel, D.K., López-Benítez, M., Soni, B. et al. Artificial neural network design for improved spectrum sensing in cognitive radio. Wireless Netw 26, 6155–6174 (2020). https://doi.org/10.1007/s11276-020-02423-y

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