Title :
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
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;
Conference_Titel :
Ubiquitous and Future Networks (ICUFN), 2015 Seventh International Conference on
Conference_Location :
Sapporo
DOI :
10.1109/ICUFN.2015.7182689
