Document Type

Article

Publication Date

2020

DOI

10.3390/s20133614

Publication Title

Sensors

Volume

20

Issue

13

Pages

16 pp.

Abstract

Implementation of dynamic spectrum access (DSA) in cognitive radio (CR) systems requires the unlicensed secondary users (SU) to implement spectrum sensing to monitor the activity of the licensed primary users (PU). Energy detection (ED) is one of the most widely used methods for spectrum sensing in CR systems, and in this paper we present a novel ED algorithm with an adaptive sensing threshold. The three-event ED (3EED) algorithm for spectrum sensing is considered for which an accurate approximation of the optimal decision threshold that minimizes the decision error probability (DEP) is found using Newton’s method with forced convergence in one iteration. The proposed algorithm is analyzed and illustrated with numerical results obtained from simulations that closely match the theoretical results and show that it outperforms the conventional ED (CED) algorithm for spectrum sensing.

Comments

© by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.

Original Publication Citation

Martian, A., Sammarraie, M., Vladeanu, C., & Popescu, D. (2020). Three-event energy detection with adaptive threshold for spectrum sensing in cognitive radio systems. Sensors, 20(13), 16 pp., Article 3614. https://doi.org/10.3390/s20133614

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