Energy-Efficient Cooperative Backscattering Closed-Form Solution for NOMA

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

Document type :

Communication dans un congrès avec actes

Title :

Energy-Efficient Cooperative Backscattering Closed-Form Solution for NOMA

Author(s) :

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

Conference title :

IEEE Global Communications Conference, GLOBECOM

City :

Madrid

Country :

Espagne

Start date of the conference :

2021-12-07

HAL domain(s) :

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

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Technologies Emergentes pour l'Internet des Objets

Collections :