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lundi 9 mai 2016.

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 BIOGRAPHY

Dr. Sahmoudi is an Associate Professor, member of the SCAN lab ( Signal, Communication, Antennas and Navigation) at the French Institute of Aeronautics and Space (ISAE-SUPAERO), Toulouse. He received a PhD in signal processing and communications systems from Paris-Sud Orsay University, France, in collaboration with Telecom Paris in 2004. During his doctoral studies he was an assistant lecturer at the prestigious School of Engineering "Ecole Polytechnique" in the Paris area (supervision of students projects on Signal Processing and GPS navigation). After his PhD he was a lecturer at Paris-Dauphine University (ensuring courses and exercices on mathematics and statistics).

From 2005 to 2007, he was a post-doctoral researcher fellow on GPS Signal Processing and Navigation at Villanova University, PA, USA. In august 2007, he joined the ETS school of engineering at Montreal, Canada, to lead the research team of precise positioning (RTK and PPP). In 2009 he became an Associate Professor at ISAE-SUPAERO, University of Toulouse. Currently his research interests focus on all aspects of signal processing for navigation and positioning in harsh environoment, weak GNSS signals acquisition and tracking, multi-frequency and multi-GNSS receivers, multipath mitigation and constructive use and multi-sensor fusion for robust navigation.

Mohamed is a member of the IEEE and ION societies, involved in reviewing for many international conferences and journals including GPS Solutions, IEEE Trans. on AES, IEEE Trans. on Signal Proc., IEEE Trans on Wireless Com., Elsevier Signal Processing, Hindawi JASP, Sensors, Journal of Navigation (ION), etc.

  TEACHING

I am teaching courses on Signal Processing, Optimal Filtering (Kalman filter, etc), GNSS Systems, GNSS Signals, GNSS Receivers Design, Measurements Processing Methods and Technologies, multi-sensor fusion.

I use to propose and supervise practical Labs with post-processing of real data (GPS, GLONASS, Galileo, Inertial and vision).

I am also supervising PhD students, master students and tutoring undergraduate students projects on navigation and autonomous systems (UAV, Robots, etc).

 RESEARCH

My research activities focus on satellites navigation and multi-sensor fusion for positioning and localization in harsh environments (urban and indoor) including the following topics :

  • GNSS Multipath and NLOS : from Mitigation to Constructive Use. The effect of assuming a direct path in a Multipath / NLOS propagation environment leads to serious degradation in accuracy and integrity. Instead of discarding all measurements which are found to be in MP/NLOS conditions, we propose to constructively use these observations to improve the positioning accuracy and integrity in harsh environments.
  • C-GNSS : Connected & Cognitive GNSS Receiver. The goal is to develop a navigation receiver by processing GNSS signals augmented with information about the user environment via a 3D model, cooperative users, a cloud server and/or perception sensors.
  • Multi-Sensor Navigation : To develop robust navigation solutions, the objective of this activity is to optimize the Tight and Ultra-Tight integration of GNSS measurements with other navigation sensors (IMU, odometer, ranging sensors, barometer and ultra-sound altitude sensor, maps, and Visual Odometry).
  • Integrity of GNSS in Environmentally Challenged Environments : The objective is to provide a robust solution in GNSS challenged environments with integrity measures (i.e. confidence indicators according to the requirements of the application at hand). To assess the receiver performance, we aim to characterize the Horizontal Position Error (HPE) in an urban environment. In this context, buildings and natural geographical obstacles reduce the visibility of satellites and add different kind of bias in the pseudorange measurements due to multipath and non-line of sight (NLOS) reflections, challenging the application of all the existing RAIM approaches.
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