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Review of channel quality indicator estimation schemes for multi-user MIMO in 3GPP LTE/LTE-a systems

Abdulhasan, Muntadher Qasim and Salman, Mustafa Ismael and Ng, Chee Kyun and Noordin, Nor Kamariah and Hashim, Shaiful Jahari and Hashim, Fazirulhisyam (2014) Review of channel quality indicator estimation schemes for multi-user MIMO in 3GPP LTE/LTE-a systems. KSII Transactions on Internet and Information Systems, 8 (6). pp. 1848-1868. ISSN 1976-7277

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Abstract

Multiple-in multiple-out (MIMO) in long-term evolution (LTE) is an essential factor in achieving high speed data rates and spectral efficiency. The unexpected growth in data rate demand has pushed researchers to extend the benefits of multi-user MIMO. The multi-user MIMO system can take full advantage of channel conditions by employing efficient adjustment techniques for scheduling, and by assigning different modulation and coding rates. However, one of the critical issues affecting this feature is the appropriate estimation of channel quality indicator (CQI) to manage the allocated resources to users. Therefore, an accurate CQI estimation scheme is required for the multi-user MIMO transmission to obtain significant improvements on spectral efficiency. This paper presents overviews of multi-user MIMO in LTE/LTE-advanced systems. The link adaptation, scheduling process, and different factors that affect the reliability of CQI measurements are discussed. State-of-the-art schemes for the post-processing CQI estimation, and the comparisons of various CQI estimation schemes to support multi-user MIMO are also addressed.

Item Type:Article
Keyword:3GPP LTE/LTE-A; Multi-user MIMO; CQI estimation; Link adaptation (LA); Scheduling
Faculty or Institute:Faculty of Engineering
Institute of Gerontology
Publisher:Korean Society for Internet Information
DOI Number:10.3837/tiis.2014.06.002
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3837/tiis.2014.06.002
ID Code:35255
Deposited By: Nurul Ainie Mokhtar
Deposited On:31 Dec 2015 12:39
Last Modified:25 Apr 2016 11:25

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