[Radio cognitive : des méthodes de détection des canaux libres]
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.
Mots-clés : Radio cognitive, Accès opportuniste, Radiomètre, Cyclostationnaire
Mohamed Ghozzi 1, 2 ; Mischa Dohler 1 ; François Marx 1 ; Jacques Palicot 2
@article{CRPHYS_2006__7_7_794_0,
author = {Mohamed Ghozzi and Mischa Dohler and Fran\c{c}ois Marx and Jacques Palicot},
title = {Cognitive radio: methods for the detection of free bands},
journal = {Comptes Rendus. Physique},
pages = {794--804},
publisher = {Elsevier},
volume = {7},
number = {7},
year = {2006},
doi = {10.1016/j.crhy.2006.07.009},
language = {en},
}
TY - JOUR AU - Mohamed Ghozzi AU - Mischa Dohler AU - François Marx AU - Jacques Palicot TI - Cognitive radio: methods for the detection of free bands JO - Comptes Rendus. Physique PY - 2006 SP - 794 EP - 804 VL - 7 IS - 7 PB - Elsevier DO - 10.1016/j.crhy.2006.07.009 LA - en ID - CRPHYS_2006__7_7_794_0 ER -
Mohamed Ghozzi; Mischa Dohler; François Marx; Jacques Palicot. Cognitive radio: methods for the detection of free bands. Comptes Rendus. Physique, Towards reconfigurable and cognitive communications, 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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