[Combinaison des techniques OFDM et CDMA pour l'UWB haut débit]
Pour les systèmes WPAN (Wireless Personal Area Networks), la gestion des ressources entre plusieurs utilisateurs d'une même picocellule ainsi que la co-existence de plusieurs picocellules sont des points importants à prendre en compte lors de l'optimisation d'un système Ultra Large Bande (ULB) haut débit. Afin d'améliorer les performances de la solution Multi-Band OFDM (Orthogonal Frequency Division Multiplex) proposée par l'alliance MBOA (Multi-Band OFDM Alliance), l'ajout d'une composante d'étalement selon l'axe fréquentiel s'avère une bonne solution pour faciliter la gestion des ressources, qui offre en outre une meilleure robustesse vis-à-vis de la sélectivité en fréquence du canal et des interférences à bande étroite. Le système SS–MC–MA (Spread Spectrum – Multi-Carrier – Multiple Access) que nous proposons, bénéficie non seulement des avantages du MC–CDMA (Multi-Carrier – Coded Division Multiple Access) apportés par l'étalement fréquentiel mais permet également une allocation dynamique des ressources plus efficace dans un contexte multi-utilisateurs et multi-picocellules. Ces améliorations peuvent être obtenues, sans augmenter la complexité du segment radio-fréquence par rapport à la solution MBOA.
For Wireless Personal Area Network (WPAN) systems, resource allocation between several users within a piconet and the coexistence of several piconets are very important points to take into consideration for the optimization of high data rate Ultra Wide Band (UWB) systems. To improve the performance of the Multi-Band OFDM (Orthogonal Frequency Division Multiplex) solution proposed by the Multi-Band OFDM Alliance (MBOA), the addition of a spreading component in the frequency domain is a good solution since it makes resource allocation easier and also offers better robustness against channel frequency selectivity and narrowband interference. The Spread Spectrum – Multi-Carrier – Multiple Access (SS–MC–MA) system proposed in this article offers not only the advantages of Multi-Carrier – Coded Division Multiple Access (MC–CDMA) brought by frequency spreading, but also a more effective dynamic resource allocation in a multi-user and multi-piconet context. These improvements are obtained without increasing the complexity of the radio-frequency part compared to the classical MBOA solution.
Mot clés : SS–MC–MA, ULB, MB–OFDM, Multi-utilisateurs, WPAN
@article{CRPHYS_2006__7_7_774_0,
author = {Emeric Gu\'eguen and Nadia Madaoui and Jean-Fran\c{c}ois H\'elard and Matthieu Crussi\`ere},
title = {Combination of {OFDM} and {CDMA} for high data rate {UWB}},
journal = {Comptes Rendus. Physique},
pages = {774--784},
publisher = {Elsevier},
volume = {7},
number = {7},
year = {2006},
doi = {10.1016/j.crhy.2006.07.001},
language = {en},
}
TY - JOUR AU - Emeric Guéguen AU - Nadia Madaoui AU - Jean-François Hélard AU - Matthieu Crussière TI - Combination of OFDM and CDMA for high data rate UWB JO - Comptes Rendus. Physique PY - 2006 SP - 774 EP - 784 VL - 7 IS - 7 PB - Elsevier DO - 10.1016/j.crhy.2006.07.001 LA - en ID - CRPHYS_2006__7_7_774_0 ER -
Emeric Guéguen; Nadia Madaoui; Jean-François Hélard; Matthieu Crussière. Combination of OFDM and CDMA for high data rate UWB. Comptes Rendus. Physique, Volume 7 (2006) no. 7, pp. 774-784. doi : 10.1016/j.crhy.2006.07.001. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2006.07.001/
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