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Multicast multigroup beamforming for per-antenna power constrained large-scale arrays
Christopoulos, Dimitrios; Chatzinotas, Symeon; Ottersten, Björn
2015In IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, 2015-August, p. 271-275
Peer reviewed
 

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Keywords :
Large-scale Multicasting; Successive Convex Approximation; Antenna arrays; Antennas; Beamforming; Constrained optimization; Iterative methods; Large scale systems; Multicasting; Network layers; Optimization; Signal processing; Transmitters; Wireless telecommunication systems; Complex optimization problems; Computationally efficient; Multi-group multicasting; Optimization variables; Per-antenna power constraints; Quadratically constrained quadratic problems; Semidefinite relaxation; Successive convex approximations; Beam forming networks
Abstract :
[en] Large in the number of transmit elements, multi-antenna arrays with per-element limitations are in the focus of the present work. In this context, physical layer multigroup multicasting under per-antenna power constrains, is investigated herein. To address this complex optimization problem low-complexity alternatives to semi-definite relaxation are proposed. The goal is to optimize the per-antenna power constrained transmitter in a maximum fairness sense, which is formulated as a non-convex quadratically constrained quadratic problem. Therefore, the recently developed tool of feasible point pursuit and successive convex approximation is extended to account for practical per-antenna power constraints. Interestingly, the novel iterative method exhibits not only superior performance in terms of approaching the relaxed upper bound but also a significant complexity reduction, as the dimensions of the optimization variables increase. Consequently, multicast multigroup beamforming for large-scale array transmitters with per-antenna dedicated amplifiers is rendered computationally efficient and accurate. A preliminary performance evaluation in large-scale systems for which the semi-definite relaxation constantly yields non rank-1 solutions is presented. © 2015 IEEE.
Disciplines :
Electrical & electronics engineering
Identifiers :
eid=2-s2.0-84953381370
Author, co-author :
Christopoulos, Dimitrios ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
yes
Title :
Multicast multigroup beamforming for per-antenna power constrained large-scale arrays
Publication date :
2015
Event name :
16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2015
Event date :
28 June 2015 through 1 July 2015
Audience :
International
Journal title :
IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
Publisher :
Institute of Electrical and Electronics Engineers Inc.
Volume :
2015-August
Pages :
271-275
Peer reviewed :
Peer reviewed
Funders :
ACCESS;Ericsson;Qamcom
Commentary :
117275 9781479919307
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