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An adaptive threshold feedback compression scheme based on channel quality indicator (CQI) in long term evolution (LTE) system

Abdulhasan, Muntadher Qasim and Salman, Mustafa Ismael and Ng, Chee Kyun and Noordin, Nor Kamariah and Hashim, Shaiful Jahari and Hashim, Fazirulhisham (2015) An adaptive threshold feedback compression scheme based on channel quality indicator (CQI) in long term evolution (LTE) system. Wireless Personal Communications, 82 (4). pp. 2323-2349. ISSN 0929-6212; ESSN: 1572-834X

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Official URL: http://link.springer.com/article/10.1007/s11277-01...

Abstract

Channel quality indicator (CQI) feedback in long-term evolution (LTE) system is an essential technique in describing the instantaneous channel state information. The CQI calculations highly depend on the accuracy of the channel estimation process in order to assign appropriate modulation and coding scheme. However, one of the critical issues affecting the LTE system performance is obtaining the CQI for each transmission period which will inevitably cost many resources. Therefore, an appropriate method for reducing CQI feedback overhead along with accurate channel estimation technique is required to manage the allocated resources and obtains significant improvements in system performance. In this paper, an adaptive threshold feedback compression scheme based on CQI scheme is proposed to obtain better system performance in terms of system throughput and error rate in LTE system. This proposed adaptive scheme dynamically adapts its threshold level to the signal to noise ratio variations, thus increasing the throughput and reducing the CQI feedback overhead. Results show that the proposed CQI based adaptive threshold feedback compression scheme enhances the tradeoff between system throughput and block error rate.

Item Type:Article
Keyword:3GPP LTE; OFDM; MIMO; Channel quality indicator (CQI) feedback; Channel estimation
Faculty or Institute:Faculty of Engineering
Institute of Gerontology
Publisher:Springer
DOI Number:10.1007/s11277-015-2350-1
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s11277-015-2350-1
ID Code:43696
Deposited By: Mohd Hafiz Che Mahasan
Deposited On:08 Aug 2016 16:52
Last Modified:01 Dec 2016 16:35

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