作者
Kien-Giang Nguyen, Le-Nam Tran, Oskari Tervo, Quang-Doanh Vu, Markku Juntti
发表日期
2015/5/21
期刊
IEEE Communications Letters
卷号
19
期号
8
页码范围
1426-1429
出版商
IEEE
简介
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.
学术搜索中的文章
KG Nguyen, LN Tran, O Tervo, QD Vu, M Juntti - IEEE Communications Letters, 2015