A Review of Mutual Coupling in MIMO Systems

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Abstract

This paper provides a systematic review of the mutual coupling in multiple-input multiple-output (MIMO) systems, including effects on performances of MIMO systems and various decoupling techniques. The mutual coupling changes the antenna characteristics in an array and, therefore, degrades the system performance of the MIMO system and causes spectral regrowth. Although the system performance can be partially improved by calibrating out the mutual coupling in the digital domain, it is more effective to use decoupling techniques (from the antenna point) to overcome the mutual coupling effects. Some popular decoupling techniques for MIMO systems (especially for massive MIMO base station antennas) are also presented.
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This paper provides a systematic review of the mutual coupling in multiple-input multiple-output (MIMO) systems, including effects on performances of MIMO systems and various decoupling techniques. The mutual coupling changes the antenna characteristics in an array and, therefore, degrades the system performance of the MIMO system and causes spectral regrowth. Although the system performance can be partially improved by calibrating out the mutual coupling in the digital domain, it is more effective to use decoupling techniques (from the antenna point) to overcome the mutual coupling effects. Some popular decoupling techniques for MIMO systems (especially for massive MIMO base station antennas) are also presented.
Original languageEnglish
JournalIEEE Access
Volume6
Pages (from-to)24706 - 24719
Number of pages14
ISSN2169-3536
DOI
Publication statusPublished - Apr 2018
Publication categoryResearch
Peer-reviewedYes

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