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Article Dans Une Revue Wireless Personal Communications Année : 2021

A Deep Neural Network Model for Hybrid Spectrum Sensing in Cognitive Radio

Résumé

Spectrum sensing (SS) is an essential task of the secondary user (SU) in a cognitive radio system. SS monitors the primary user (PU) activity in order to avoid any collision with SU, as the latter should be silent when PU is active on a given channel. Hybrid SS (HSS) is one of the powerful methods used to monitor PU activity. It consists of using different detectors together to make a final decision on the PU status. In this manuscript, artificial neural networks (ANN) are used to perform HSS. Since our data is composed from the test statistics (TSs) of several detectors, thus it can be modeled as tabular. Fully connected neural networks become the most suitable ANN model. We applied cutting-edge techniques in the field of deep learning in order to get the best possible accurate neural network model in our application. These techniques boil down to: embedding, regularization, batch normalization and smart learning rate selection. With the help TSs related to several detectors, ANN is trained to distinguish between two hypotheses, H-0: PU is absent and H-1: PU is active. Numerical results show the effectiveness of our proposed ANN-based HSS, as it outperforms the classical ANN-based energy detector and proves its capability to detect PU signal at very low SNR.
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Dates et versions

hal-03127020 , version 1 (08-02-2021)

Identifiants

Citer

Abbass Nasser, Mohamad Chaitou, Ali Mansour, Koffi-Clément Yao, Hussein Charara. A Deep Neural Network Model for Hybrid Spectrum Sensing in Cognitive Radio. Wireless Personal Communications, 2021, ⟨10.1007/s11277-020-08013-7⟩. ⟨hal-03127020⟩
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