L'évaluation de la consommation d'énergie d'une radiocommunication nécessite l'analyse du cycle de vie des éléments utilisés. Cependant, cette analyse ne décrit pas précisément de limite énergétique. Les approches théoriques permettent d'évaluer ces limites qui sont connues dans plusieurs cas de transmission de l'information.
Cependant, les réponses ne sont pas toujours satisfaisantes, particulièrement dans le cas de canaux variants dans le temps. Après une rapide présentation des notions d'énergie limite d'une radiocommunication, et en commençant par une approche globale du problème, nous montrons que, contrairement aux résultats publiés, les limites énergétiques sont toujours différentes de zéro si les contraintes physiques sont correctement exprimées.
The evaluation of the energy consumption of a radiocommunication requires to analyse the life cycle of the elements used. However, this analysis does not specify the energetic limits. Theoretical approaches allow one to draw these limits, which are known in multiple cases of information transmission. However, the answers are not always satisfactory, in particular in the case of time-varying channels. After a brief presentation of the notion of energetic limits of a radiocommunication, and beginning with a global approach, we show that, contrary to the published results, the energetic limits always differ from zero if the physical constraints are correctly expressed.
Mot clés : Communication, Efficacité, Énergie, Modèle, Canal
Jean-Yves Baudais 1
@article{CRPHYS_2017__18_2_144_0, author = {Jean-Yves Baudais}, title = {Fundamental energetic limits of radio communication systems}, journal = {Comptes Rendus. Physique}, pages = {144--155}, publisher = {Elsevier}, volume = {18}, number = {2}, year = {2017}, doi = {10.1016/j.crhy.2016.11.009}, language = {en}, }
Jean-Yves Baudais. Fundamental energetic limits of radio communication systems. Comptes Rendus. Physique, Volume 18 (2017) no. 2, pp. 144-155. doi : 10.1016/j.crhy.2016.11.009. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2016.11.009/
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☆ Part of this article was presented in Journées scientifiques, URSI France, Rennes, France, March 2016.
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