Year

2019

Degree Name

Doctor of Philosophy

Department

School of Electrical, Computer and Telecommunications Engineering

Abstract

Massive multiple-input and multiple-output (MIMO) is one of the key enabling techniques for the 5-th generation of cellular mobile communications (5G). Owing to a large number of antennas at the BS, massive MIMO systems can provide substantial improvements in spectrum effciency (SE). However, the increased number of antennas significantly increases the RF circuit power consumption. It is critical to investigate also the energy efficiency (EE) performance.

The EE of massive MIMO systems strongly depends on the receiver design and the RF hardware design. By providing more sophisticated interference cancellation, nonlinear receivers, e.g., successive interference cancellation (SIC)-based receivers, may remarkably improve the SE. This improvement may greatly reduce the number of antennas required at BSs to maintain a given quality of service (QoS), and therefore alleviate the RF circuit power consumption. On the other hand, it is known that analog-to-digital converters (ADCs) contribute significantly to the RF circuit power consumption and the use of low-resolution ADCs can reduce RF circuit power consumption. However, the EE performance of massive MIMO systems with nonlinear receivers and low-resolution ADCs is still limitedly examined. The aim of this thesis is to provide insights on how receiver design and imperfect hardware affect the EE of massive MIMO systems.

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Unless otherwise indicated, the views expressed in this thesis are those of the author and do not necessarily represent the views of the University of Wollongong.