ETS
11/07/2019 - Jérémy Brossard passed his Ph.D. oral defence
Congratulations to Jérémy Brossard who has successfully defended his Ph.D. dissertation entitled “ Application de la commande B à un quadricoptère... (+ de détail)
11/07/2019 - NextGen MIMO SDAR Project receives NSERC Collaborative Research and Development (CRD) Funding
−Universities and aerospace companies collaborate to develop an integrated communication, navigation and surveillance solution for use in modern... (+ de détail)
13/03/2019 - Tilahun Melkamu Getu passed his Ph.D. oral defence with the highest ETS distinction and excellence!
Congratulations to Tilahun Melkamu Getu who has successfully defended his Ph.D. dissertation entitled “Advanced RFI Detection, RFI Excision and... (+ de détail)
11/03/2019 - Mohamed Lajmi Cherif passed his master oral exam successfully!
Congratulations to Mohamed Lajmi Cherif who successfully completed his Master oral defense titled “Linear multi-sensor integrated navigation... (+ de détail)
18/12/2018 - Abdessamad Amrhar passed his master oral exam successfully!
Congratulations to Abdessamad Amrhar who successfully completed his Master oral defense titled “RECONFIGURABLE FPGA IMPLEMENTATION FOR AVIONIC... (+ de détail)
06/12/2018 - Eric Zhang passed his master oral exam successfully!
Congratulations to Eric Zhang who successfully completed his Master oral defense titled “Design and Implementation of a Wideband Radio for... (+ de détail)
12/10/2018 - Golrokh Araghi passed her master oral exam successfully!
Congratulations to Golrokh Araghi who successfully completed her Master oral defense entitled “Development of a temperature dependent model for... (+ de détail)
04/10/2018 - Congratulations to Dr. Maherizo Andrianarison
Congratulations to Dr. Maherizo Andrianarison who successfully completed his PhD defense on October 2, 2018. The title of his thesis is “New... (+ de détail)
03/10/2018 - The AVIO-505 Project won the Best of Session (CNS-C: Communications Technologies) Award at 37th DASC
Congratulations to the AVIO-505 team! The paper “In-Flight Performance Analysis of a Wideband Radio Using SDR for Avionic Applications” won the... (+ de détail)
29/08/2018 - Anh-Quang Nguyen passed his master oral exam successfully with the degree of excellence!
Congratulations to Anh-Quang Nguyen who passed his master oral defense entitled “Direct RF Sampling Architecture for VHF Avionics” with the... (+ de détail)
26/02/2018 - The AVIO-505 8th and last Scientific Meeting was successfully held!
The 8th and last Scientific Meeting of the AVIO-505 project was successfully held on February 19, 2018, at the Department of Electrical... (+ de détail)
24/01/2018 - Congratulations to Dr Neda Navidi
Congratulations to Dr. Neda Navidi who successfully completed her PhD defense on January 19, 2018. Her thesis "Driving Behavior Assessment... (+ de détail)
19/10/2017 - Dave Côté passed successfully his master oral exam!
Congratulations to Dave Côté who passed his master oral defense on October 4, 2017. His thesis title is "Détermination de l'angle de lacet et... (+ de détail)
22/09/2017 - LASSENA AVIO-505 won the Best of Session (IMA-4) Award at DASC’17
Congratulation to AVIO-505 team! The paper "Direct RF Sampling Transceiver Architecture Applied to VHF Radio, ACARS, and ELTs" won the Best of... (+ de détail)
22/09/2017 - Congratulations,Neda Navidi! Best Paper Award in ICCSTE 2017.
Congratulations to Mme. Neda Navidi who was presented the Best Paper Award in ICCSTE 2017 (Vancouve,Canada,August 7-8,2017). Mme. Neda Navidi is... (+ de détail)
22/09/2017 - Congratulations! Best Student Paper Award in ICNS 2017
Congratulations to Mr. Abdessamad Amrhar who was presented the Best Student Paper Award in ICNS 2017( Herdon, VA,USA, April 18-20, 2017). We also... (+ de détail)
26/09/2015 - Adrien Mixte passed successfully his master oral exam !
Congratulations to Adrien Mixed which received honors for his defense on August 28, 2015. His project, ibNav, focused on the development of a... (+ de détail)
26/09/2015 - Mr. Marc-Antoine Fortin made his PhD oral exam successfully and distinction « Excellence »
Congratulations to Mr. Marc-Antoine Fortin who made his PhD oral exam successfully. The works of mister Fortin's master's degree, subject the title... (+ de détail)
26/09/2015 - Mrs.Neda Navidi gets the Best Poster Award attributed by the UAV-g 2015
Congratulations to Mrs. Neda Navidi who gets the Best Poster Award during the UAV-g 2015 conference, in Toronto, Canada, the September 2nd 2015.... (+ de détail)
22/05/2015 - LASSENA’s work awarded at 2015 ICNS
The work entitled "Integrated Direct RF Sampling Front-end for VHF Avionics Systems" has been recognized as the Best Future Communications Paper... (+ de détail)
20/10/2014 - LASSENA’s work awarded at 33rd DASC
The work entitled "DME/DME Navigation using a Single Low-Cost SDR and Sequential Operation" has been recognized as the Best Paper of the Session... (+ de détail)
09/10/2014 - New research project awarded by NSERC in the field of protection against satellite interference: AVIO-601
Recently, Professor René Jr. Landry from the Department of Electrical Engineering of ÉTS has obtained a Collaborative Research and Development... (+ de détail)
24/09/2014 - Stéphane Ehouman has obtained the second prize at ReSMiQ Innovation Day
Congratulations to Mr. Stéphane Ehouman who has obtained the second prize at ReSMiQ Innovation Day competition celebrated on September 18, 2014.... (+ de détail)
27/08/2014 - Mohammad Honarparvar passed successfully his Ph.D. oral exam (DGA-1033)
Congratulations to Mr. Mohammad Honarparvar who passed the Ph.D. oral examination part of his DGA-1033. Mohammad's thesis is entitled : "Design of... (+ de détail)
27/06/2014 - AMOOS Conferences
The LASSENA is pleased to invite you to international conferences about AMOOS project, Autonomous Mission for On-Orbit Servicing, of the 2014 ISU... (+ de détail)
20/06/2013 - Performance improvements of a navigation algorithm INS / GPS low cost used in urban areas
To provide a solution robust and accurate navigation , GPS receivers must operate in optimal conditions , that is to say have a direct line of... (+ de détail)
08/04/2013 - Marinvent and ETS successfully develop a wireless prototyping process for Marinvent’s APM through Engage project
Montreal, Quebec, Monday, April 8, 2013 – Marinvent announces today the successful completion of its Airfoil Performance Monitor (APM)-Engage... (+ de détail)
13/03/2013 - LASSENA’s participation at the 8th day of discoveries in 2013
Wednesday, March 13th was held the 8th edition of the discoveries day. On this day held a poster contest on research projects students master's... (+ de détail)
06/06/2012 - Philippe Lavoie made his defense viva(master’s degree) successfully and distinction "excellence"
Congratulations to Philippe Lavoie who made his viva (master's degree) successfully. The works of mister Lavoie's master's degree, subject the title... (+ de détail)
Photo RLandry
Bienvenue sur le site de [Fr] [En] [Es] [De]
René Jr. Landry
ETS
CV TL Laboratories Teaching Research Research trainee

TITLE :
Acquisition and Tracking Threshold Reduction Techniques for GPS Receivers

ABSTRACT :

This thesis deals with the improvement of Spread Spectrum digital receiver robustness characteristics especially those of GPS. A manner to reach this objective is to improve the post-correlation robustness of the GPS digital channels. The technique, called here TASAP, uses this principle of robustness by providing a velocity aiding from the Navigation Filter (PVT) itself to each GPS channel. As soon as the C/No is too weak to allow the normal use of the receiver tracking mode, the PLL and DLL loops switch to the AVIA mode (Internal and Autonomous Velocity Aiding). The NCOs of that carrier tracking loop (PLL) and Digital Delay Lock Loop (DDLL) are then pushed by this velocity aiding (internal to the receiver). This memorandum brings the theoretical demonstrations that reducing the noise bandwidth allows the receiver to reduce the acquisition and tracking thresholds of GPS signals between 5 to 15 dB depending of the situation.

A large panorama of potential original techniques to reduce the acquisition and tracking thresholds is detailed. The theoretical elements are exposed to allow the better understanding of the advantages and the efficiencies of AVIA Loops and to demonstrate the actual C/No thresholds.
The classical models of phase-locked loop are described and with this straightforward model, the code loop is studied more in details in the case of an external velocity aiding resulting from an Inertial Navigation System (INS). Finally, a simple model of the PLL with an autonomous velocity aiding coming from the GPS Navigator itself is carried out.. The model takes into account all the perturbations which corrupt the functionality of the PLL (SA, pseudorange noise, velocity error, etc).

The modelisation of an entire communication system is designed in software with the conception of a generic baseband GPS receiver simulator called MATNAV. The loop filter, the PLL and DLL loop discriminators, the impulse and step response analysis, the loop bandwidths and several simulations can also be found in this work. Our simulations show an improvement of 5 to 15dB on the C/No threshold by using an internal and autonomous velocity aiding from the GPS Navigation Filter. Moreover, the integration of 7 velocity aiding modes to MATNAV simplify the task to the user for measurement comparisons.

KEYWORDS :

Robustness - Threshold - Acquisition - Tracking - GPS - Navigation - Numerical GPS Receiver - Velocity Aiding - INS - Inertial Aiding - MATNAV - TASAP - AVIA Loop - Digital Signal Processing - ARD Capsule - DIOGENE.

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