[La modulation en ondelettes : une modulation alternative à faible consommation d'énergie]
Dans cet article, nous présentons la modulation en ondelettes, basée sur la transformée discrète en ondelettes, comme une modulation à faible consommation d'énergie. Le signal généré par cette modulation a, en effet, de faibles variations de puissance par construction. Nous analysons la modulation en ondelettes pour plusieurs familles d'ondelettes et nous comparons ses performances avec celles de l'OFDM, en termes de facteur de crête (PAPR), de propriétés de la densité spectrale de puissance ainsi que de l'impact de l'amplificateur de puissance sur la remontée des lobes secondaires. Les performances en termes de taux d'erreur binaire et de complexité d'implémentation sont également évaluées, et plusieurs compromis sont caractérisés.
This paper presents wavelet modulation, based on the discrete wavelet transform, as an alternative modulation with low energy consumption. The transmitted signal has low envelope variations, which induces a good efficiency for the power amplifier. Wavelet modulation is analyzed and compared for different wavelet families with orthogonal frequency division multiplexing (OFDM) in terms of peak-to-average power ratio (PAPR), power spectral density (PSD) properties, and the impact of the power amplifier on the spectral regrowth. The performance in terms of bit error rate and complexity of implementation are also evaluated, and several trade-offs are characterized.
Mots-clés : Modulation en ondelettes, Transformée en ondelettes, OFDM, Facteur de crête, Ondelettes de Meyer, Ondelette de Haar
Marwa Chafii 1 ; Jacques Palicot 1 ; Rémi Gribonval 2
@article{CRPHYS_2017__18_2_156_0, author = {Marwa Chafii and Jacques Palicot and R\'emi Gribonval}, title = {Wavelet modulation: {An} alternative modulation with low energy consumption}, journal = {Comptes Rendus. Physique}, pages = {156--167}, publisher = {Elsevier}, volume = {18}, number = {2}, year = {2017}, doi = {10.1016/j.crhy.2016.11.010}, language = {en}, }
TY - JOUR AU - Marwa Chafii AU - Jacques Palicot AU - Rémi Gribonval TI - Wavelet modulation: An alternative modulation with low energy consumption JO - Comptes Rendus. Physique PY - 2017 SP - 156 EP - 167 VL - 18 IS - 2 PB - Elsevier DO - 10.1016/j.crhy.2016.11.010 LA - en ID - CRPHYS_2017__18_2_156_0 ER -
Marwa Chafii; Jacques Palicot; Rémi Gribonval. Wavelet modulation: An alternative modulation with low energy consumption. Comptes Rendus. Physique, Energy and radiosciences, Volume 18 (2017) no. 2, pp. 156-167. doi : 10.1016/j.crhy.2016.11.010. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2016.11.010/
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