GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulations

GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulations

Abstract This article investigates new strategies to compute accurate low‐complexity log‐likelihood ratio (LLR) values based on the Bayesian formulation under uncorrelated fading channels for both antipodal and code shift keying modulations when no channel state information (CSI) is available at the...

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Main Authors: Lorenzo Ortega, Jordi Vilà‐Valls, Charly Poulliat, Pau Closas
Format: Article
Language:English
Published: Wiley 2021-02-01
Series:IET Radar, Sonar & Navigation
Online Access:https://doi.org/10.1049/rsn2.12017
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spelling doaj-7a1da69c0acc46ebb31844299af0c23c2021-08-02T08:25:45ZengWileyIET Radar, Sonar & Navigation1751-87841751-87922021-02-0115211312710.1049/rsn2.12017GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulationsLorenzo Ortega0Jordi Vilà‐Valls1Charly Poulliat2Pau Closas3Telecommunications for Space and Aeronautics Lab (TéSA) Toulouse FranceISAE‐SUPAERO University of Toulouse Toulouse FranceINP/ENSEEIHT University of Toulouse Toulouse FranceDepartment of Electrical and Computer Engineering Northeastern University Boston Massachusetts USAAbstract This article investigates new strategies to compute accurate low‐complexity log‐likelihood ratio (LLR) values based on the Bayesian formulation under uncorrelated fading channels for both antipodal and code shift keying modulations when no channel state information (CSI) is available at the receiver. These LLR values are then used as input to modern error‐correcting schemes used in the data decoding process of last‐generation Global Navigation Satellite System signals. Theoretical analysis based on the maximum achievable rate is presented for the different methods in order to evaluate the performance degradation with respect to the optimal CSI channel. Finally, the frame error rate simulation results are shown, validating the appropriate performance of the proposed LLR approximation methods.https://doi.org/10.1049/rsn2.12017
collection DOAJ
language English
format Article
sources DOAJ
author Lorenzo Ortega
Jordi Vilà‐Valls
Charly Poulliat
Pau Closas
spellingShingle Lorenzo Ortega
Jordi Vilà‐Valls
Charly Poulliat
Pau Closas
GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulations
IET Radar, Sonar & Navigation
author_facet Lorenzo Ortega
Jordi Vilà‐Valls
Charly Poulliat
Pau Closas
author_sort Lorenzo Ortega
title GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulations
title_short GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulations
title_full GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulations
title_fullStr GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulations
title_full_unstemmed GNSS data demodulation over fading environments: Antipodal and M‐ary CSK modulations
title_sort gnss data demodulation over fading environments: antipodal and m‐ary csk modulations
publisher Wiley
series IET Radar, Sonar & Navigation
issn 1751-8784
1751-8792
publishDate 2021-02-01
description Abstract This article investigates new strategies to compute accurate low‐complexity log‐likelihood ratio (LLR) values based on the Bayesian formulation under uncorrelated fading channels for both antipodal and code shift keying modulations when no channel state information (CSI) is available at the receiver. These LLR values are then used as input to modern error‐correcting schemes used in the data decoding process of last‐generation Global Navigation Satellite System signals. Theoretical analysis based on the maximum achievable rate is presented for the different methods in order to evaluate the performance degradation with respect to the optimal CSI channel. Finally, the frame error rate simulation results are shown, validating the appropriate performance of the proposed LLR approximation methods.
url https://doi.org/10.1049/rsn2.12017
work_keys_str_mv AT lorenzoortega gnssdatademodulationoverfadingenvironmentsantipodalandmarycskmodulations
AT jordivilavalls gnssdatademodulationoverfadingenvironmentsantipodalandmarycskmodulations
AT charlypoulliat gnssdatademodulationoverfadingenvironmentsantipodalandmarycskmodulations
AT pauclosas gnssdatademodulationoverfadingenvironmentsantipodalandmarycskmodulations
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