Vu, Quang-Doanh and Tran, Le-Nam and Farrell, Ronan and Hong, Een-Kee
(2016)
Energy-Efficient Zero-Forcing Precoding Design
for Small-Cell Networks.
IEEE Transactions on Communications, 64 (2).
pp. 790-804.
ISSN 0090-6778
Abstract
We consider small-cell networks with multiple antenna
transceivers and base stations (BSs) cooperating to jointly
design linear precoders to maximize the network energy efficiency,
subject to a sum power and per-antenna power constraints at individual
BSs, as well as user-specific quality of service (QoS) requirements.
Assuming zero-forcing precoding, we formulate the problem
of interest as a concave–convex fractional program to which
we proposed a centralized optimal solution based on the prevailing
Dinkelbach algorithm. To facilitate distributed implementations,
we transform the design problem into an equivalent convex program
using Charnes–Cooper’s transformation. Then, based on
the framework of alternative direction method of multipliers
(ADMM), we develop a decentralized algorithm, which is numerically
shown to achieve fast convergence. Since BSs are generally
power-hungry, it may be more energy-efficient if some BSs can
be shut down, while still satisfying the QoS constraints. Toward
this end, we investigate the problem of joint precoder design and
BS selection, which is a mixed Boolean nonlinear program, and
then provide an optimal solution by customizing the branch-and-bound
method. For real-time applications, we propose a greedy
algorithm which achieves near-optimal performance in polynomial
time. Numerical results are provided to demonstrate the
effectiveness of the proposed algorithms.
| Item Type: |
Article
|
| Keywords: |
Small-cell networks; energy efficiency; MIMO; joint design; ADMM; branch-and-bound; |
| Academic Unit: |
Faculty of Science and Engineering > Electronic Engineering |
| Item ID: |
9573 |
| Identification Number: |
https://doi.org/10.1109/TCOMM.2015.2502941 |
| Depositing User: |
Ronan Farrell
|
| Date Deposited: |
20 Jun 2018 14:14 |
| Journal or Publication Title: |
IEEE Transactions on Communications |
| Publisher: |
IEEE |
| Refereed: |
Yes |
| URI: |
|
| Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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