Spectrum and Energy Efficiency in Massive MIMO Enabled HetNets: A Stochastic Geometry Approach

Author

Anqi He ; Lifeng Wang ; Elkashlan, Maged ; Yue Chen ; Kai-Kit Wong

Author_Institution

Sch. of Electron. Eng. & Comput. Sci., Queen Mary, Univ. of London, London, UK

Volume

19

Issue

12

fYear

2015

Firstpage

2294

Lastpage

2297

Abstract

This letter focuses on the spectrum efficiency (SE) and energy efficiency (EE) of K-tier heterogeneous networks (HetNets), in which massive multiple-input multiple-output (MIMO) is employed in the macro cells. We consider the impact of massive MIMO on flexible cell association. We develop an analytical approach to examine SE and EE of HetNets. We confirm that using flexible cell association can improve the EE of HetNets by offloading data traffic to small cell. This is due to an increase of EE in the macro cell. Moreover, we show that serving moderate number of users in the macro cells with massive MIMO can boost both SE and EE.

Keywords

MIMO communication; cellular radio; energy conservation; geometry; radio spectrum management; stochastic processes; telecommunication power management; K-tier heterogeneous networks; MIMO enabled HetNets; energy efficiency; macro cells; multiple-input multiple-output; spectrum efficiency; stochastic geometry approach; Base stations; Downlink; Fading; Interference; MIMO; Power demand; Signal to noise ratio; Energy efficiency; Het- Nets; HetNets; flexible cell association; massive MIMO; spectrum efficiency;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2015.2493060

Filename

7302534