The effect of channel estimation errors on the energy efficiency of downlink massive MIMO systems

Author

Tebe, Parfait I. ; Yujun Kuang ; Opare, Kwasi A. ; Kponyo, Jerry J.

Author_Institution

Sch. of Commun. & Inf. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2015

fDate

7-10 July 2015

Firstpage

963

Lastpage

968

Abstract

In this paper the effect of channel estimation errors on the energy efficiency of a downlink massive multiple-input multiple-output system is investigated and analyzed. The required downlink transmit power of the zero forcing (ZF) and maximum ratio transmission (MRT) precoding schemes are derived and analyzed under imperfect channel state information condition. Analytical and simulations results show that, as the reliability of the estimation increases from zero, power increases to a certain point and begins to decrease. The value of reliability where the power begins to decrease depends on the number of base station antennas and the number of users within the cell.

Keywords

MIMO communication; antenna radiation patterns; cellular radio; channel coding; channel estimation; energy conservation; precoding; telecommunication network reliability; telecommunication power management; MRT precoding scheme; ZF downlink power transmission; base station antennas; cellular system; channel estimation error; channel state information condition; downlink massive MIMO system energy efficiency; maximum ratio transmission precoding scheme; multiple input multiple output system reliability; zero forcing downlink power transmission; Antennas; Erbium; Estimation; Handheld computers; Reliability; Massive MIMO; channel reliability; channel state information; downlink transmit power;

fLanguage

English

Publisher

ieee

Conference_Titel

Ubiquitous and Future Networks (ICUFN), 2015 Seventh International Conference on

Conference_Location

Sapporo

ISSN

2288-0712

Type

conf

DOI

10.1109/ICUFN.2015.7182689

Filename

7182689