Joint Detection and CFO Estimation for QAM Constellations

Rui Miguel Henriques Dias Morgado Dinis

doi:10.1109/VETECS.2011.5956202

Joint Detection and CFO Estimation for QAM Constellations

Rui Miguel Henriques Dias Morgado Dinis

DEE2010-A1 Telecomunicações

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

4 Citations (Scopus)

Abstract

In this paper we propose the use of QAM constellations, specifically 4, 16, and 64-QAM, in severely time-dispersive channels and with moderate CFOs (Carrier Frequency Offsets). We consider an SC-FDE (Single Carrier Frequency-Domain Equalization) and assume that previously to the equalization procedure a coarse CFO estimation and compensation is performed. Since the coarse CFO estimate can have a significant error leading to a residual CFO we present and evaluate a receiver with joint detection and carrier synchronization in order to guarantee a good BER. We employ frequency-domain iterative DFE (Decision Feedback Equalization) receivers denoted by IB-DFE (Iterative Block-Decision Feedback Equalization), which are combined with a DD (Decision-Directed) CFO estimator. Our aim is to determine the synchronization requirements for 4, 16, and 64-QAM and compare several methods for the DD CFO estimators when using these QAM constellations.

Original language	Unknown
Title of host publication	IEEE Vehicular Technology Conference
Pages	1-5
DOIs	https://doi.org/10.1109/VETECS.2011.5956202
Publication status	Published - 1 Jan 2011
Event	73rd IEEE Vehicular Technology Conference (VTC Spring) - Duration: 1 Jan 2011 → …

Conference

Conference	73rd IEEE Vehicular Technology Conference (VTC Spring)
Period	1/01/11 → …

Access to Document

10.1109/VETECS.2011.5956202

Cite this

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title = "Joint Detection and CFO Estimation for QAM Constellations",

abstract = "In this paper we propose the use of QAM constellations, specifically 4, 16, and 64-QAM, in severely time-dispersive channels and with moderate CFOs (Carrier Frequency Offsets). We consider an SC-FDE (Single Carrier Frequency-Domain Equalization) and assume that previously to the equalization procedure a coarse CFO estimation and compensation is performed. Since the coarse CFO estimate can have a significant error leading to a residual CFO we present and evaluate a receiver with joint detection and carrier synchronization in order to guarantee a good BER. We employ frequency-domain iterative DFE (Decision Feedback Equalization) receivers denoted by IB-DFE (Iterative Block-Decision Feedback Equalization), which are combined with a DD (Decision-Directed) CFO estimator. Our aim is to determine the synchronization requirements for 4, 16, and 64-QAM and compare several methods for the DD CFO estimators when using these QAM constellations.",

keywords = "quadrature amplitude modulation, single carrier frequency-domain equalization, Carrier frequency offset",

author = "Dinis, {Rui Miguel Henriques Dias Morgado}",

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doi = "10.1109/VETECS.2011.5956202",

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T1 - Joint Detection and CFO Estimation for QAM Constellations

AU - Dinis, Rui Miguel Henriques Dias Morgado

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N2 - In this paper we propose the use of QAM constellations, specifically 4, 16, and 64-QAM, in severely time-dispersive channels and with moderate CFOs (Carrier Frequency Offsets). We consider an SC-FDE (Single Carrier Frequency-Domain Equalization) and assume that previously to the equalization procedure a coarse CFO estimation and compensation is performed. Since the coarse CFO estimate can have a significant error leading to a residual CFO we present and evaluate a receiver with joint detection and carrier synchronization in order to guarantee a good BER. We employ frequency-domain iterative DFE (Decision Feedback Equalization) receivers denoted by IB-DFE (Iterative Block-Decision Feedback Equalization), which are combined with a DD (Decision-Directed) CFO estimator. Our aim is to determine the synchronization requirements for 4, 16, and 64-QAM and compare several methods for the DD CFO estimators when using these QAM constellations.

AB - In this paper we propose the use of QAM constellations, specifically 4, 16, and 64-QAM, in severely time-dispersive channels and with moderate CFOs (Carrier Frequency Offsets). We consider an SC-FDE (Single Carrier Frequency-Domain Equalization) and assume that previously to the equalization procedure a coarse CFO estimation and compensation is performed. Since the coarse CFO estimate can have a significant error leading to a residual CFO we present and evaluate a receiver with joint detection and carrier synchronization in order to guarantee a good BER. We employ frequency-domain iterative DFE (Decision Feedback Equalization) receivers denoted by IB-DFE (Iterative Block-Decision Feedback Equalization), which are combined with a DD (Decision-Directed) CFO estimator. Our aim is to determine the synchronization requirements for 4, 16, and 64-QAM and compare several methods for the DD CFO estimators when using these QAM constellations.

KW - quadrature amplitude modulation

KW - single carrier frequency-domain equalization

KW - Carrier frequency offset

U2 - 10.1109/VETECS.2011.5956202

DO - 10.1109/VETECS.2011.5956202

M3 - Conference contribution

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BT - IEEE Vehicular Technology Conference

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