Energy-Efficient Cooperative Backscattering Closed-Form Solution for NOMA

El Hassani, Hajar; Savard, Anne; Belmega, Elena Veronica; C. de Lamare, Rodrigo

Type de document :

Communication dans un congrès avec actes

Titre :

Energy-Efficient Cooperative Backscattering Closed-Form Solution for NOMA

Auteur(s) :

El Hassani, Hajar [Auteur]
Equipes Traitement de l'Information et Systèmes [ETIS - UMR 8051]
Savard, Anne [Auteur]

Centre for Digital Systems [CERI SN - IMT Nord Europe]
Ecole nationale supérieure Mines-Télécom Lille Douai [IMT Nord Europe]
Circuits Systèmes Applications des Micro-ondes - IEMN [CSAM - IEMN ]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Belmega, Elena Veronica [Auteur]
Equipes Traitement de l'Information et Systèmes [ETIS - UMR 8051]
C. de Lamare, Rodrigo [Auteur]
University of York [York, UK]
Departamento de Informática = Department of Informatics [PUC-Rio]

Titre de la manifestation scientifique :

IEEE Global Communications Conference, GLOBECOM

Ville :

Madrid

Pays :

Espagne

Date de début de la manifestation scientifique :

2021-12-07

Discipline(s) HAL :

Mathématiques [math]
Sciences de l'ingénieur [physics]

Résumé en anglais : [en]

In this paper, the energy efficiency of multiuser non orthogonal multiple access (NOMA) systems in the presence of a backscatter device is investigated. The energy efficiency maximization problem is formulated as a tradeoff ...
Lire la suite >In this paper, the energy efficiency of multiuser non orthogonal multiple access (NOMA) systems in the presence of a backscatter device is investigated. The energy efficiency maximization problem is formulated as a tradeoff between the sum rate and the total power consumption and shown to be nonconvex. We then derive a closed-form expression of the optimal reflection coefficient. Remarkably, the obtained expression allows the reformulation of the optimization in terms of the power allocation policy into a convex optimization problem that has recently been solved in closed form. This overall solution can then be exploited to reduce the computational complexity of Dinkelbach's algorithm for maximizing the ratio sum rate vs. total power. Simulation results show that the presence of backscatter devices significantly improve the energy efficiency of NOMA systems and reach up to 450% relative gains compared to OMA.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet ANR :

Technologies Emergentes pour l'Internet des Objets

Collections :