Energy Efficiency Maximization for Heterogeneous Networks: A Joint Linear Precoder Design and Small-Cell Switching-Off Approach

Long Nguyen, Quang Duong, Diep N. Nguyen, Le-Nam Tran

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

In this paper, we consider a multiuser multiple-input multipleoutput (MU-MIMO) heterogeneous network (HetNet) in which a macro base station (MBS) and multiple small-cells (SCs) coexist to serve multiple user terminals. We propose a joint linear precoder design problem to maximize the energy efficiency of the considered network. To tackle the cross-tier interference in the HetNets, we exploit zero-forcing precoding where the interference at the users is cancelled out by block diagonalization scheme. A novel group sparsity promoted as group Lasso is proposed using the weighted norm minimization, where the group sparsity pattern indicates those SCs that can be switched off and non-associated users. Simulation results show that the proposed algorithm outperforms many existing algorithms in terms of the total energy efficiency in the HetNets.
Original languageEnglish
Title of host publicationIEEE Global Conference on Signal and Information Processing (GlobalSIP 2016)
Place of PublicationWashington, DC, USA
Publisher IEEE
Pages1-5
DOIs
Publication statusPublished - 24 Apr 2017

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