Achieving energy efficiency fairness in multicell MISO downlink
Nguyen, Kien-Giang; Tran, Le-Nam; Tervo, Oskari; Vu, Quang-Doanh; Juntti, Markku (2015-05-21)
K. G. Nguyen, L. N. Tran, O. Tervo, Q. D. Vu and M. Juntti, "Achieving Energy Efficiency Fairness in Multicell MISO Downlink," in IEEE Communications Letters, vol. 19, no. 8, pp. 1426-1429, Aug. 2015. doi: 10.1109/LCOMM.2015.2436382
© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2018062726506
Tiivistelmä
Abstract
We investigate the fairness of achievable energy efficiency in a multicell multiuser multiple-input single-output (MISO) downlink system, where a beamforming scheme is designed to maximize the minimum energy efficiency among all base stations. The resulting optimization problem is a nonconvex max-min fractional program, which is generally difficult to solve optimally. We propose an iterative beamformer design based on an inner approximation algorithm which aims at locating a Karush-Kuhn-Tucker solution to the nonconvex program. By novel transformations, we arrive at a convex problem at each iteration of the proposed algorithm, which is amendable for being approximated by a second order cone program. The numerical results demonstrate that the proposed algorithm outperforms the existing schemes in terms of the convergence rate and processing time.
Kokoelmat
- Avoin saatavuus [29905]