LO

Lorenzo Ortega

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Documents
Affiliations actuelles
  • Institut Polytechnique des Sciences Avancées (IPSA)
  • Laboratoire de recherche coopératif dans les télécommunications spatiales et aéronautiques (TESA)
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Publications

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Robust semiparametric efficient estimator for time delay and Doppler estimation

Lorenzo Ortega , Stefano Fortunati
IEEE Signal Processing Letters, 2025, ⟨10.1109/LSP.2025.3560533⟩
Article dans une revue hal-04805170 v2
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Emerging trends in signal processing and machine learning for positioning, navigation and timing information: special issue editorial

Pau Closas , Lorenzo Ortega , Julien Lesouple , Petar M. Djuric
EURASIP Journal on Advances in Signal Processing, 2024, 2024 (1), pp.84. ⟨10.1186/s13634-024-01182-8⟩
Article dans une revue hal-04695683 v1
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Bayesian EM Approach for GNSS Parameters of Interest Estimation Under Constant Modulus Interference

Julien Lesouple , Lorenzo Ortega
EURASIP Journal on Advances in Signal Processing, In press, 2024 (1), pp.32. ⟨10.1186/s13634-024-01129-z⟩
Article dans une revue hal-04485071 v2
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On the efficiency of misspecified Gaussian inference in nonlinear regression: application to time-delay and Doppler estimation

Stefano Fortunati , Lorenzo Ortega
Signal Processing, 2024
Article dans une revue hal-04349291 v1
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GNSS Channel Coding Structures for Fast Acquisition Signals in Harsh Environment Conditions

Lorenzo Ortega , Charly Poulliat
Navigation, 2023, 70 (3), pp.navi.585. ⟨10.33012/navi.585⟩
Article dans une revue hal-04003710 v1
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Band-limited impulse response estimation performance

Corentin Lubeigt , Lorenzo Ortega , Jordi Vilà-Valls , Eric Chaumette
Signal Processing, 2023, 208, pp.108998. ⟨10.1016/j.sigpro.2023.108998⟩
Article dans une revue hal-04541129 v1

Approximate maximum likelihood time-delay estimation for two closely spaced sources

Corentin Lubeigt , François Vincent , Lorenzo Ortega , Jordi Vilà-Valls , Eric Chaumette
Signal Processing, 2023, 210, pp.109056. ⟨10.1016/j.sigpro.2023.109056⟩
Article dans une revue hal-04541122 v1

On GNSS Synchronization Performance Degradation under Interference Scenarios: Bias and Misspecified Cramér-Rao Bounds

Lorenzo Ortega , Corentin Lubeigt , Jordi Vilà-Valls, , Eric Chaumette
Navigation, 2023, 70 (4), pp.navi.606. ⟨10.33012/navi.606⟩
Article dans une revue hal-04541095 v1

Insights on the Estimation Performance of GNSS-R Coherent and Noncoherent Processing Schemes

Lorenzo Ortega , Jordi Vila-Valls , Eric Chaumette
IEEE Geoscience and Remote Sensing Letters, 2022, 19, pp.1-5. ⟨10.1109/LGRS.2021.3079579⟩
Article dans une revue hal-04541183 v1

Non-Binary PRN-Chirp Modulation: A GNSS Fast Acquisition Signal Waveform

Lorenzo Ortega , Jordi Vila-Valls , Eric Chaumette
IEEE Communications Letters, 2022, pp.1-1. ⟨10.1109/LCOMM.2022.3185319⟩
Article dans une revue hal-03774100 v1

Clean-to-Composite Bound Ratio: A Multipath Criterion for GNSS Signal Design and Analysis

Corentin Lubeigt , Lorenzo Ortega , Jordi Vila-Valls , Laurent Lestarquit , Eric Chaumette
IEEE Transactions on Aerospace and Electronic Systems, 2022, pp.1-1. ⟨10.1109/TAES.2022.3172023⟩
Article dans une revue hal-03774103 v1

Untangling First and Second Order Statistics Contributions in Multipath Scenarios

Corentin Lubeigt , Lorenzo Ortega , Jordi Vilà-Valls , Eric Chaumette
Signal Processing, 2022, pp.108868. ⟨10.1016/j.sigpro.2022.108868⟩
Article dans une revue hal-03878879 v1

Accounting for Acceleration – Signal Parameters Estimation Performance Limits in High Dynamics Applications

Hamish Mcphee , Lorenzo Ortega , Jordi Vila-Valls , Eric Chaumette
IEEE Transactions on Aerospace and Electronic Systems, 2022, pp.1-13. ⟨10.1109/TAES.2022.3189611⟩
Article dans une revue hal-03769981 v1

On the Accuracy Limits of Misspecified Delay-Doppler Estimation

Hamish Mcphee , Lorenzo Ortega , Jordi Vilà-Valls , Eric Chaumette
Signal Processing, 2022, pp.108872. ⟨10.1016/j.sigpro.2022.108872⟩
Article dans une revue hal-03878878 v1
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Low Complexity Robust Data Demodulation for GNSS

Lorenzo Ortega , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault Roudier , Hanaa Al-Bitar et al.
Sensors, 2021, 21 (4), pp.1341. ⟨10.3390/s21041341⟩
Article dans une revue hal-03341451 v1

On the Impact and Mitigation of Signal Crosstalk in Ground-Based and Low Altitude Airborne GNSS-R

Corentin Lubeigt , Lorenzo Ortega , Jordi Vilà-Valls , Laurent Lestarquit , Eric Chaumette
Remote Sensing, 2021, 13 (6), pp.1085. ⟨10.3390/rs13061085⟩
Article dans une revue hal-04541237 v1

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

Lorenzo Ortega Espluga , Jordi Vilà‐valls , Charly Poulliat , Pau Closas
IET Radar Sonar and Navigation, 2021, 15 (2), pp.113-127. ⟨10.1049/rsn2.12017⟩
Article dans une revue hal-03245922 v1

On Nested Property of Root-LDPC Codes

Lorenzo Ortega Espluga , Charly Poulliat
IEEE Wireless Communications Letters, 2021, 10 (5), pp.1005-1009. ⟨10.1109/LWC.2021.3054414⟩
Article dans une revue hal-03245925 v1
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Compact CRB for delay, Doppler, and phase estimation – application to GNSS SPP and RTK performance characterisation

Daniel Medina , Lorenzo Ortega , Jordi Vilà-Valls , Pau Closas , Francois Vincent et al.
IET Radar Sonar and Navigation, 2020, 14 (10), pp.1537-1549. ⟨10.1049/iet-rsn.2020.0168⟩
Article dans une revue hal-02974914 v1
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LLR Approximation for Fading Channels Using a Bayesian Approach

Lorenzo Ortega Espluga , Marion Aubault-Roudier , Charly Poulliat , Marie-Laure Boucheret , Hanaa Al-Bitar et al.
IEEE Communications Letters, 2020, 24 (6), pp.1244-1248. ⟨10.1109/LCOMM.2020.2978832⟩
Article dans une revue hal-03246009 v1
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Joint Delay-Doppler Estimation Performance in a Dual Source Context

Corentin Lubeigt , Lorenzo Ortega , Jordi Vilà-Valls , Laurent Lestarquit , Eric Chaumette
Remote Sensing, 2020, 12 (23), pp.3894. ⟨10.3390/rs12233894⟩
Article dans une revue hal-03108747 v1
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Performance Limits of GNSS Code-Based Precise Positioning: GPS, Galileo & Meta-Signals

Priyanka Das , Lorenzo Ortega , Jordi Vilà-Valls , François Vincent , Eric Chaumette et al.
Sensors, 2020, 20 (8), pp.2196-2217. ⟨10.3390/s20082196⟩
Article dans une revue hal-02974864 v1
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Positioning Performance Limits of GNSS Meta-Signals and HO-BOC Signals

Lorenzo Ortega , Daniel Medina , Jordi Vilà-Valls , François Vincent , Eric Chaumette
Sensors, 2020, 20 (12), pp.3586-3613. ⟨10.3390/s20123586⟩
Article dans une revue hal-02974941 v1
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Optimizing the Co-Design of Message Structure and Channel Coding to Reduce the TTD for a Galileo 2nd Generation Signal

Lorenzo Ortega , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault-Roudier , Hanaa Al Bitar-El Natour
Navigation, 2020, 67 (3), pp.471-492. ⟨10.1002/navi.382⟩
Article dans une revue hal-02941370 v1

New multiplexing method to add a new signal in the Galileo E1 band

Lorenzo Ortega Espluga , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault‐roudier , Hanaa Al‐bitar
IET Radar Sonar and Navigation, 2020, 14 (11), pp.1735-1746. ⟨10.1049/iet-rsn.2020.0197⟩
Article dans une revue hal-03245938 v1

Theoretical Performance Analysis of GNSS Tracking Loops

Samy Labsir , Gaël Pages , Lorenzo Ortega , Jordi Vilà-Valls , Éric Chaumette
2023 IEEE/ION Position, Location and Navigation Symposium (PLANS), Apr 2023, Monterey, France. pp.946-951, ⟨10.1109/PLANS53410.2023.10139980⟩
Communication dans un congrès hal-04541103 v1

GNSS L5/E5 Maximum Likelihood Synchronization Performance Degradation under DME Interferences

Lorenzo Ortega , Corentin Lubeigt , Jordi Vilã-Valls , Eric Chaumette
2023 IEEE/ION Position, Location and Navigation Symposium (PLANS), Apr 2023, Monterey, France. pp.553-558, ⟨10.1109/PLANS53410.2023.10140102⟩
Communication dans un congrès hal-04541116 v1
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An EM Approach for GNSS Parameters of Interest Estimation Under Constant Modulus Interference

Julien Lesouple , Lorenzo Ortega
EUSIPCO 2023, EURASIP, Sep 2023, Helsinki (Aalto University School of Economics), Finland
Communication dans un congrès hal-04144451 v1

Time-Delay and Doppler Estimation with a Carrier Modulated by a Band-Limited Signal

Joan Bernabeu Frias , Lorenzo Ortega , Antoine Blais , Yoan Gregoire , Eric Chaumette
2023 IEEE 9th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), Dec 2023, Herradura, France. pp.346-350, ⟨10.1109/CAMSAP58249.2023.10403430⟩
Communication dans un congrès hal-04541082 v1

Theoretical Evaluation of the GNSS Synchronization Performance Degradation under Interferences

Lorenzo Ortega , Jordi Vilà-Valls , Eric Chaumette
35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022), Sep 2022, Denver, France. pp.3758-3767, ⟨10.33012/2022.18564⟩
Communication dans un congrès hal-04541136 v1
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Close-to-Ground Single Antenna GNSS-R

Corentin Lubeigt , Francois Vincent , Lorenzo Ortega , Jordi Vilà-Valls , Laurent Lestarquit et al.
ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC 2022), Apr 2022, Online Event, Netherlands
Communication dans un congrès hal-03758599 v1

Multipath Estimating Techniques Performance Analysis

Corentin Lubeigt , Lorenzo Ortega , Jordi Vila-Valls , Laurent Lestarquit , Eric Chaumette
2022 IEEE Aerospace Conference (AERO), Mar 2022, Big Sky, France. pp.1-6, ⟨10.1109/AERO53065.2022.9843802⟩
Communication dans un congrès hal-03774107 v1

A Multidimensional Scaling Approach for Cooperative GNSS Navigation

Ali Naouri , Lorenzo Ortega , Jordi Vila-Valls , Eric Chaumette
2021 International Conference on Localization and GNSS (ICL-GNSS), Jun 2021, Tampere, France. pp.1-6, ⟨10.1109/ICL-GNSS51451.2021.9452296⟩
Communication dans un congrès hal-04541162 v1

On The Accuracy Limit of Joint Time-Delay/Doppler/Acceleration Estimation with a Band-Limited Signal

Hamish Mcphee , Lorenzo Ortega , Jordi Vila-Valls , Eric Chaumette
ICASSP 2021 - 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Jun 2021, Toronto, France. pp.5130-5134, ⟨10.1109/ICASSP39728.2021.9414270⟩
Communication dans un congrès hal-04541153 v1

On the Time-Delay Estimation Accuracy Limit of GNSS Meta-Signals

Lorenzo Ortega , Jordi Vila-Valls , Eric Chaumette , Francois Vincent
2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC), Sep 2020, Rhodes, France. pp.1-6, ⟨10.1109/ITSC45102.2020.9294581⟩
Communication dans un congrès hal-04541200 v1

On the Time-Delay Estimation Performance Limit of New GNSS Acquisition Codes

Lorenzo Ortega , Jordi Vila-Valls , Eric Chaumette , Francois Vincent
2020 International Conference on Localization and GNSS (ICL-GNSS), Jun 2020, Tampere, France. pp.1-6, ⟨10.1109/ICL-GNSS49876.2020.9115552⟩
Communication dans un congrès hal-04541215 v1

Robust Tracking under Measurement Model Mismatch via Linearly Constrained Extended Kalman Filtering

Lorenzo Ortega , Jordi Vila-Valls , Eric Chaumette , Gael Pages , François Vincent
2020 59th IEEE Conference on Decision and Control (CDC), Dec 2020, Jeju, France. pp.2924-2929, ⟨10.1109/CDC42340.2020.9303842⟩
Communication dans un congrès hal-04541173 v1

A Compact CRB for the Single Source Conditional Signal Model with Application to Delay-Doppler-Phase Estimation of Band-Limited Signals

Lorenzo Ortega , Daniel Medina , Jordi Vila-Valls , François Vincent , Eric Chaumette
2020 59th IEEE Conference on Decision and Control (CDC), Dec 2020, Jeju, France. pp.2906-2911, ⟨10.1109/CDC42340.2020.9303748⟩
Communication dans un congrès hal-04541190 v1

Optimal Channel Coding Structures for Fast Acquisition Signals in Harsh Environment Conditions

Lorenzo Ortega , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault-Roudier , Hanaa Al Bitar-El Natour
32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), Sep 2019, Miami, Florida, United States. pp.4026-4040, ⟨10.33012/2019.17113⟩
Communication dans un congrès hal-02976621 v1

Data Decoding Analysis of Next Generation GNSS Signals

Lorenzo Ortega , Pau Closas , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault-Roudier et al.
32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), Sep 2019, Miami, Florida, United States. pp.1090-1105, ⟨10.33012/2019.17046⟩
Communication dans un congrès hal-02976620 v1

Binary Root Protograph LDPC Codes for CSK Modulation toIncrease the Data Rate and Reduce the TTD

Lorenzo Ortega , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault-Roudier , Hanaa Al Bitar-El Natour
32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), Sep 2019, Miami, Florida, United States. pp.1020-1038, ⟨10.33012/2019.17040⟩
Communication dans un congrès hal-02976619 v1
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New Solutions to Reduce the Time-To-CED and to Improve the CED Robustness of the Galileo I/NAV Message

Lorenzo Ortega Espluga , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault , Hanaa Al Bitar-El Natour
IEEE/ION Position, Location and Navigation Symposium (PLANS 2018), Apr 2018, Monterey, California, United States. pp.1-10
Communication dans un congrès hal-02603519 v1
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Advanced co-design of message structure and channel coding scheme to reduce the time to CED and to improve the resilience for a Galileo 2nd Generation new signal

Lorenzo Ortega Espluga , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault , Hanaa Al Bitar-El Natour
ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC 2018), Dec 2018, Noordwijk, Netherlands. pp.0
Communication dans un congrès hal-02279418 v1

Joint Design of GNSS Signal and Message Structure for Galileo 2nd Generation

Lorenzo Ortega Espluga , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault , Hanaa Al Bitar-El Natour
ITSNT 2018, 5th International Technical Symposium on Navigation and Timing, CNES; ENAC, Oct 2018, Toulouse, France. ⟨10.31701/itsnt2018.19⟩
Communication dans un congrès hal-01942282 v1

New Solutions on the Design of a Galileo Acquisition-Aiding Signal to Improve the TTFF and the Sensitivity

Lorenzo Ortega , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault , Hanaa Al Bitar
Cognizant Autonomous Systems for Safety Critical Applications Workshop - International Technical meeting and showcase of GNSS technology, products and services - ION GNSS+ 2018, Institute of Navigation (ION), Jan 2018, Reston (Virginie), United States. pp.(electronic medium)
Communication dans un congrès hal-03023415 v1
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Co-design of message Structure and Channel Coding Scheme to Reduce the Time to CED and to Improve the Resilience for a Galileo 2nd Generation New Signal

Lorenzo Ortega , Charly Poulliat , Marie-Laure Boucheret , Marion Aubault , Hanaa Al Bitar-El Natour
31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018), Sep 2018, Miami, Florida, United States. pp.4064-4078, ⟨10.33012/2018.15878⟩
Communication dans un congrès hal-02295361 v1
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Signal optimization for Galileo evolution

Lorenzo Ortega
Networking and Internet Architecture [cs.NI]. Institut National Polytechnique de Toulouse - INPT, 2019. English. ⟨NNT : 2019INPT0118⟩
Thèse tel-04169759 v1
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Statistical Signal Processing for the Design of Navigation and Localization Systems

Lorenzo Ortega
Engineering Sciences [physics]. Université toulouse 3 Paul Sabatier, 2025
HDR tel-04978914 v1