Variable threshold M-QAM with feedback delay over Nakagami-m fading channels

Sang Do Lee; Young Chai Ko

doi:10.1109/VETECF.2009.5378871

Variable threshold M-QAM with feedback delay over Nakagami-m fading channels

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In this paper, we propose an adaptive M-ary quadrature amplitude modulation (M-QAM) with variable threshold, which adapts the threshold of rate-region boundaries to the variation of feedback delay between the transmitter and the receiver, over independent and identically-distributed (i.i.d) Nakagami-m fading (NMF) channel. The proposed scheme exploits the estimation of instantaneous bit error rate (BER) which is based on the maximum a posteriori (MAP) criterion in [1]. Based on the proposed scheme, we derive the threshold adaptation algorithm to minimize the effect of the feedback delay on the spectral efficiency and the average BER. Numerical results show that our proposed scheme is more reliable to the feedback delay than conventional adaptive M-QAM with fixed thresholds.

Original language	English
Title of host publication	Proceedings of the 2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall
DOIs	https://doi.org/10.1109/VETECF.2009.5378871
Publication status	Published - 2009
Event	2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall - Anchorage, AK, United States Duration: 2009 Sept 20 → 2009 Sept 23

Publication series

Name	IEEE Vehicular Technology Conference
ISSN (Print)	1550-2252

Other

Other	2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall
Country/Territory	United States
City	Anchorage, AK
Period	09/9/20 → 09/9/23

Keywords

Adaptive modulation
BER estimation
MQAM
Threshold adaptation

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

Access to Document

10.1109/VETECF.2009.5378871

Cite this

Lee, SD & Ko, YC 2009, Variable threshold M-QAM with feedback delay over Nakagami-m fading channels. in Proceedings of the 2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall., 5378871, IEEE Vehicular Technology Conference, 2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall, Anchorage, AK, United States, 09/9/20. https://doi.org/10.1109/VETECF.2009.5378871

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title = "Variable threshold M-QAM with feedback delay over Nakagami-m fading channels",

abstract = "In this paper, we propose an adaptive M-ary quadrature amplitude modulation (M-QAM) with variable threshold, which adapts the threshold of rate-region boundaries to the variation of feedback delay between the transmitter and the receiver, over independent and identically-distributed (i.i.d) Nakagami-m fading (NMF) channel. The proposed scheme exploits the estimation of instantaneous bit error rate (BER) which is based on the maximum a posteriori (MAP) criterion in [1]. Based on the proposed scheme, we derive the threshold adaptation algorithm to minimize the effect of the feedback delay on the spectral efficiency and the average BER. Numerical results show that our proposed scheme is more reliable to the feedback delay than conventional adaptive M-QAM with fixed thresholds.",

keywords = "Adaptive modulation, BER estimation, MQAM, Threshold adaptation",

author = "Lee, {Sang Do} and Ko, {Young Chai}",

year = "2009",

doi = "10.1109/VETECF.2009.5378871",

language = "English",

isbn = "9781424425150",

series = "IEEE Vehicular Technology Conference",

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note = "2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall ; Conference date: 20-09-2009 Through 23-09-2009",

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AU - Lee, Sang Do

AU - Ko, Young Chai

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N2 - In this paper, we propose an adaptive M-ary quadrature amplitude modulation (M-QAM) with variable threshold, which adapts the threshold of rate-region boundaries to the variation of feedback delay between the transmitter and the receiver, over independent and identically-distributed (i.i.d) Nakagami-m fading (NMF) channel. The proposed scheme exploits the estimation of instantaneous bit error rate (BER) which is based on the maximum a posteriori (MAP) criterion in [1]. Based on the proposed scheme, we derive the threshold adaptation algorithm to minimize the effect of the feedback delay on the spectral efficiency and the average BER. Numerical results show that our proposed scheme is more reliable to the feedback delay than conventional adaptive M-QAM with fixed thresholds.

AB - In this paper, we propose an adaptive M-ary quadrature amplitude modulation (M-QAM) with variable threshold, which adapts the threshold of rate-region boundaries to the variation of feedback delay between the transmitter and the receiver, over independent and identically-distributed (i.i.d) Nakagami-m fading (NMF) channel. The proposed scheme exploits the estimation of instantaneous bit error rate (BER) which is based on the maximum a posteriori (MAP) criterion in [1]. Based on the proposed scheme, we derive the threshold adaptation algorithm to minimize the effect of the feedback delay on the spectral efficiency and the average BER. Numerical results show that our proposed scheme is more reliable to the feedback delay than conventional adaptive M-QAM with fixed thresholds.

KW - Adaptive modulation

KW - BER estimation

KW - MQAM

KW - Threshold adaptation

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ER -

Variable threshold M-QAM with feedback delay over Nakagami-m fading channels

Abstract

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Keywords

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