Reducing the Computational Complexity of Multicasting in Large-Scale Antenna Systems - CentraleSupélec Accéder directement au contenu
Article Dans Une Revue IEEE Transactions on Wireless Communications Année : 2017

Reducing the Computational Complexity of Multicasting in Large-Scale Antenna Systems

Romain Couillet
Chau Yuen
  • Fonction : Auteur

Résumé

In this paper, we study the physical layer multicasting to multiple co-channel groups in large-scale antenna systems. The users within each group are interested in a common message and different groups have distinct messages. In particular, we aim at designing the precoding vectors solving the so-called quality of service (QoS) and weighted max-min fairness (MMF) problems, assuming that the channel state information is available at the base station (BS). To solve both problems, the baseline approach exploits the semidefinite relaxation (SDR) technique. Considering a BS with N antennas, the SDR complexity is more than O(N6) , which prevents its application in large-scale antenna systems. To overcome this issue, we present two new classes of algorithms that, not only have significantly lower computational complexity than existing solutions, but also largely outperform the SDR-based methods. Moreover, we present a novel duality between transformed versions of the QoS and the weighted MMF problems. The duality explicitly determines the solution to the weighted MMF problem given the solution to the QoS problem, and vice versa. Numerical results are used to validate the effectiveness of the proposed solutions and to make comparisons with existing alternatives under different operating conditions.
Fichier principal
Vignette du fichier
jrnl_multicasting.pdf (1.67 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01784930 , version 1 (12-07-2018)

Identifiants

Citer

Meysam Sadeghi, Luca Sanguinetti, Romain Couillet, Chau Yuen. Reducing the Computational Complexity of Multicasting in Large-Scale Antenna Systems. IEEE Transactions on Wireless Communications, 2017, 16 (5), pp.2963 - 2975. ⟨10.1109/TWC.2017.2672751⟩. ⟨hal-01784930⟩
51 Consultations
97 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More