Joint variable threshold M-QAM and ARQ for Nakagami-m fading channel with feedback delay

Sang Do Lee; Young Chai Ko

doi:10.1109/LCOMM.2010.02.092191

Joint variable threshold M-QAM and ARQ for Nakagami-m fading channel with feedback delay

Sang Do Lee, Young Chai Ko

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

In this paper, we develop a cross-layer combining of adaptive M-ary quadrature amplitude modulation (M-QAM) and automatic repeat request (ARQ) protocol, which adapts the threshold of rate-region boundaries to the variation of feedback delay over the Nakagami-m fading (NMF) channels. We derive a threshold adaptation scheme to reduce the effect of the feedback delay on bit error rate (BER). Numerical results reveal that MQAM with threshold adaptation is more reliable to the feedback delay than M-QAM with fixed thresholds. When we combine the proposed scheme with ARQ, the enhanced BER can lower the probability of packet loss and reduce the number of packet retransmissions.

Original language	English
Article number	5403613
Pages (from-to)	139-141
Number of pages	3
Journal	IEEE Communications Letters
Volume	14
Issue number	2
DOIs	https://doi.org/10.1109/LCOMM.2010.02.092191
Publication status	Published - 2010 Feb

Keywords

Feedback delay
M-QAM and ARQ
Threshold adaptation

ASJC Scopus subject areas

Modelling and Simulation
Computer Science Applications
Electrical and Electronic Engineering

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10.1109/LCOMM.2010.02.092191

Cite this

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title = "Joint variable threshold M-QAM and ARQ for Nakagami-m fading channel with feedback delay",

abstract = "In this paper, we develop a cross-layer combining of adaptive M-ary quadrature amplitude modulation (M-QAM) and automatic repeat request (ARQ) protocol, which adapts the threshold of rate-region boundaries to the variation of feedback delay over the Nakagami-m fading (NMF) channels. We derive a threshold adaptation scheme to reduce the effect of the feedback delay on bit error rate (BER). Numerical results reveal that MQAM with threshold adaptation is more reliable to the feedback delay than M-QAM with fixed thresholds. When we combine the proposed scheme with ARQ, the enhanced BER can lower the probability of packet loss and reduce the number of packet retransmissions.",

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note = "Funding Information: Manuscript received November 8, 2009. The associate editor coordinating the review of this letter and approving it for publication was F. Jondral. S.-D. Lee is with Samsung Electronics, Suwon, Korea (e-mail: sar-dor.lee@samsung.com). Y.-C. Ko is with the School of Electrical Engineering, Korea University, Seoul 136-701, Korea (e-mail: koyc@korea.ac.kr). This research was supported by the MKE(The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2009-C1090-0902-0037). Digital Object Identifier 10.1109/LCOMM.2010.02.092191",

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N1 - Funding Information: Manuscript received November 8, 2009. The associate editor coordinating the review of this letter and approving it for publication was F. Jondral. S.-D. Lee is with Samsung Electronics, Suwon, Korea (e-mail: sar-dor.lee@samsung.com). Y.-C. Ko is with the School of Electrical Engineering, Korea University, Seoul 136-701, Korea (e-mail: koyc@korea.ac.kr). This research was supported by the MKE(The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2009-C1090-0902-0037). Digital Object Identifier 10.1109/LCOMM.2010.02.092191

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N2 - In this paper, we develop a cross-layer combining of adaptive M-ary quadrature amplitude modulation (M-QAM) and automatic repeat request (ARQ) protocol, which adapts the threshold of rate-region boundaries to the variation of feedback delay over the Nakagami-m fading (NMF) channels. We derive a threshold adaptation scheme to reduce the effect of the feedback delay on bit error rate (BER). Numerical results reveal that MQAM with threshold adaptation is more reliable to the feedback delay than M-QAM with fixed thresholds. When we combine the proposed scheme with ARQ, the enhanced BER can lower the probability of packet loss and reduce the number of packet retransmissions.

AB - In this paper, we develop a cross-layer combining of adaptive M-ary quadrature amplitude modulation (M-QAM) and automatic repeat request (ARQ) protocol, which adapts the threshold of rate-region boundaries to the variation of feedback delay over the Nakagami-m fading (NMF) channels. We derive a threshold adaptation scheme to reduce the effect of the feedback delay on bit error rate (BER). Numerical results reveal that MQAM with threshold adaptation is more reliable to the feedback delay than M-QAM with fixed thresholds. When we combine the proposed scheme with ARQ, the enhanced BER can lower the probability of packet loss and reduce the number of packet retransmissions.

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Joint variable threshold M-QAM and ARQ for Nakagami-m fading channel with feedback delay

Abstract

Keywords

ASJC Scopus subject areas

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