Cognitive radio: methods for the detection of free bands

Mohamed Ghozzi; Mischa Dohler; François Marx; Jacques Palicot

doi:10.1016/j.crhy.2006.07.009

Cognitive radio: methods for the detection of free bands
[Radio cognitive : des méthodes de détection des canaux libres]

Mohamed Ghozzi ^1,² ; Mischa Dohler ¹ ; François Marx ¹ ; Jacques Palicot ²

¹ France Télécom R&D, 28, chemin du vieux chêne, 38243 Meylan cedex, France
² Supélec – campus de Rennes, avenue de la Boulaie, 35511 Cesson-Sévigné cedex, France

Comptes Rendus. Physique, Volume 7 (2006) no. 7, pp. 794-804.

Résumé
Abstract

Par opposition aux systèmes actuels où l'allocation de spectre est statique, les terminaux radio cognitive de demain pourront chercher de manière dynamique les fréquences d'accès au réseau par la détection des bandes de fréquences libres dans le spectre radio. Dans cet article, nous nous intéressons aux différentes méthodes de détection d'un signal noyé dans le bruit en précisant leurs avantages et leurs inconvénients. Ensuite, une méthode de détection cyclostationnaire dite détection multi-cycles sera proposée. Pour illustrer notre propos, nous appliquerons ces méthodes à la détection des canaux libres sur les bandes de télévision.

In contrast to current systems where the spectrum allocation is static, future cognitive radio devices will be able to seek and use in a dynamic way the frequencies for network access; this will be done by autonomous detection of vacant bands in the radio spectrum. In this article, we are interested in various methods of detection of a signal embedded in the noise by specifying their advantages and their drawbacks. Following that, a cyclostationary detection method, called multi-cycles detection, will be proposed. For illustrative purposes, we will apply these methods to the detection of the free channels within the television (TV) bands.

Publié le : 2006-09-01

DOI : 10.1016/j.crhy.2006.07.009

Keywords: Cognitive radio, Opportunistic access, Radiometer, Cyclostationary
Mot clés : Radio cognitive, Accès opportuniste, Radiomètre, Cyclostationnaire

Affiliations des auteurs :

Mohamed Ghozzi ^{1, 2} ; Mischa Dohler ¹ ; François Marx ¹ ; Jacques Palicot ²

¹ France Télécom R&D, 28, chemin du vieux chêne, 38243 Meylan cedex, France
² Supélec – campus de Rennes, avenue de la Boulaie, 35511 Cesson-Sévigné cedex, France

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Mohamed Ghozzi; Mischa Dohler; François Marx; Jacques Palicot. Cognitive radio: methods for the detection of free bands. Comptes Rendus. Physique, Volume 7 (2006) no. 7, pp. 794-804. doi : 10.1016/j.crhy.2006.07.009. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2006.07.009/

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