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22-07-2020 | Issue 8/2020

Artificial neural network design for improved spectrum sensing in cognitive radio

Journal:: Wireless Networks > Issue 8/2020

Authors:: Dhaval K. Patel, Miguel López-Benítez, Brijesh Soni, Ángel F. García-Fernández

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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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Title: Artificial neural network design for improved spectrum sensing in cognitive radio
Authors:: Dhaval K. Patel
Miguel López-Benítez
Brijesh Soni
Ángel F. García-Fernández
Publication date: 22-07-2020
DOI: https://doi.org/10.1007/s11276-020-02423-y
Publisher: Springer US
Journal: Wireless Networks The Journal of Mobile Communication, Computation and Information
Issue 8/2020
Print ISSN: 1022-0038
Electronic ISSN: 1572-8196

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