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Posts

Future Blog Post

less than 1 minute read

Published: January 01, 2199

This post will show up by default. To disable scheduling of future posts, edit config.yml and set future: false.

Blog Post number 4

less than 1 minute read

Published: August 14, 2015

This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

Blog Post number 3

less than 1 minute read

Published: August 14, 2014

This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

Blog Post number 2

less than 1 minute read

Published: August 14, 2013

This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

Blog Post number 1

less than 1 minute read

Published: August 14, 2012

This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.

publications

Joint delay-doppler estimation performance in a dual source context

Published in Remote Sensing, 2020

This paper presents the derivation of a closed-form Cramér-Rao bound for the estimation of the time-delay and Doppler frequency of a signal in presence of a single multipath.

On the impact and mitigation of signal crosstalk in ground-based and low altitude airborne GNSS-R

Published in Remote Sensing, 2021

This paper makes use of the Cramér-Rao bound as a metric to assess the impact of signal crosstalk between two antennas of a GNSS-R receiver.

Multipath estimating techniques performance analysis

Published in IEEE Aerospace Conference, 2022

This paper presents an approach to assess multipath effect based on existing (multipath error envelop) and new (Cramér-Rao bound) metrics.

Close-to-ground single antenna GNSS-R

Published in ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC), 2022

This paper presents different solutions to perform ground-based GNSS reflectometry using a single antenna collecting both the direct and the reflected paths.

Clean-to-Composite Bound Ratio: a multipath criterion for GNSS signal design and analysis

Published in IEEE Transactions on Aerospace and Electronic Systems, 2022

This paper proposes a multipath metric based on the ratio between two Cramér-Rao bounds for GNSS signal design and analysis.

Les signaux à bande large au service de la réflectométrie par GNSS à site bas

Published in Colloque du Groupe de Recherche et d'Etudes de Traitement du Signal et des Images (GRETSI), 2022

This paper presents highlights the feasibility of close-to-ground GNSS reflectometry using recent wideband GNSS signals and dual source signal processing techniques.

Untangling first and second order statistics contributions in multipath scenarios

Published in Signal Processing, 2023

This paper presents the derivation of a closed-form misspecified Cramér-Rao bound for low-cost GNSS receivers in presence of multipath.

GNSS L5/E5 maximum likelihood synchronization performance degradation under DME interferences

Published in IEEE/ION Position Location and Navigation Symposium (PLANS), 2023

This paper presents misspecified Cramér-Rao bound for GNSS receivers in presence of DME interferences.

Band-limited impulse response estimation performance

Published in Signal Processing, 2023

This paper presents a model for signals reflected from extended reflecting surfaces. This model is based on a discrete representation of the reflecting surface impulse response. Possible strategies to evaluate the size of the impulse response are also proposed.

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

Published in Signal Processing, 2023

In this paper an approximation of the dual source maximum likelihood criterion is proposed to tackle the untractable case when the sources are very closed in space.

On the GNSS synchronization performance degradation under interference scenarios: bias and misspecified CRB

Published in Navigation, 2023

In this paper, a closed form expression of the misspecified Cramér-Rao bound is derived for the case of a GNSS receiver with an unknown interference. This result is illustrated with simulations involving a GPS L1 C/A signal and a jammer using an LFM signal.

Towards surface mapping using GNSS-IR

Published in IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2023

This paper presents a reflection signal model for close-to-ground GNSS-IR scenarios. This model allows to map reflection coefficients of the reflecting surface.

Deliberate model misspecification for weather radar signal Doppler spectrum moments estimation

Published in 32nd European Signal Processing Conference (EUSIPCO), 2024

This paper presents an estimation method of the first two moments (mean power and mean frequency) of the Doppler spectrum of radar weather signals based on a signal model misspefication. The Misspecified Cramér-Rao bound is used to evaluate the performance of the proposed approach.

softwares

CRB Overviewer

An introduction to determinististic estimation theory tools

GNSS Satellites Predictor

A way to know where they are

talks

Journées CNES Jeunes Chercheurs (JC2)

Published: October 08, 2021

The Journées CNES Jeunes Chercheurs (JC2) is a three days event gathering all the 2nd year graduate students funded by CNES in France. Each students is asked to present their PhD topic in a three minutes presentation before a poster session where interested people may ask questions. This edition took place at the Cité de l’Espace in Toulouse, France.

TéSA Seminar

Published: February 08, 2022

Laboratory seminar on my PhD current work that took place at the Ibis hôtel next door the TéSA laboratory in Toulouse, France.

IEEE Aerospace Conference 2022

Published: March 08, 2022

Presentation* of the paper Multipath estimating techniques performance analysis at the IEEE Aerospace Conference 2022 that took place at the Yellowstone Conference Center in Big Sky, Montana, USA.

NAVITEC 2022

Published: April 06, 2022

Presentation* of the paper Close-to-ground single antenna GNSS-R at the ESA Workhop NAVITEC.

GRETSI 2022

Published: September 09, 2022

Presentation of the paper Les signaux à bande large au service de la réflectométrie par GNSS à site bas at the French speaking GdR GRETSI 2022 that took place at the Palais des Congrès in Nancy, France.

SLSIP 2022

Published: October 11, 2022

An introduction to the paper Band-limited impulse response estimation performance at the 4th edition of the Statistical Learning for Signal and Image Processing (SLSIP) workshop that took place at the Teatre Art i Joia in Cadaqués, Spain.

PhD Defense

Published: February 14, 2023

Signal processing for GNSS reflectometry

IEEE/ION Position Location and Navigation Symposium (PLANS) 2023

Published: April 26, 2023

Presentation given by Dr. Lorenzo Ortega of the paper GNSS L5/E5 maximum likelihood synchronization performance degradation under DME interferences at the IEEE/ION PLANS 2023 conference that took place at the Hyatt Regency Monterey in Monterey, California, USA.

IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) 2023

Published: December 12, 2023

Presentation given by Pr. François Vincent of the paper Towards surface mapping using GNSS-IR at the IEEE CAMSAP 2023 conference that took place at the Los Sueños Mariott Resort in Los Sueños, Herradura, Costa Rica.