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UID:507@cran.univ-lorraine.fr
DTSTART;TZID=Europe/Paris:20240716T110000
DTEND;TZID=Europe/Paris:20240716T123000
DTSTAMP:20240719T143623Z
URL:https://www.cran.univ-lorraine.fr/events/seminaire-helena-calatrava-gn
 ss-signal-processing-for-precise-and-robust-positioning/
SUMMARY:Séminaire Helena Calatrava (Northeastern University\, Boston)
DESCRIPTION:Speaker: Helena Calatrava (Northeastern University\, Boston\, U
 SA)\nTitle: GNSS Signal Processing for Precise and Robust Positioning\n\nA
 bstract:\nIn this talk\, we will explore two methodologies designed to enh
 ance the performance of Global Navigation Satellite Systems (GNSS): collab
 orative positioning techniques to improve positioning accuracy and robust 
 signal processing to enhance resilience against jamming attacks. First\, w
 e will introduce the Massive User-Centric Single Difference (MUCSD) algori
 thm\, which enhances GNSS accuracy through user collaboration. MUCSD lever
 ages a network of receivers exchanging observables and noisy estimates of 
 position and clock bias. Implemented as an iterative weighted least square
 s (WLS) estimator\, MUCSD achieves a performance comparable to Differentia
 l GNSS (DGNSS) without the need for costly reference stations. Simulation 
 results demonstrate that MUCSD outperforms DGNSS as the number of collabor
 ative receivers increases\, showcasing its scalability. Next\, we will dis
 cuss the Robust Interference Mitigation (RIM) framework for snapshot archi
 tectures\, addressing interferences such as continuous wave and chirp jamm
 ing signals. While studies on RIM typically assume the number of quantizat
 ion bits allows for full signal representation\, our study examines the im
 pact of low quantization bits on baseline snapshot receiver performance in
  the presence of interference. Additionally\, we will analyze the effect o
 f quantization on the median absolute deviation (MAD) robust measure of st
 atistical dispersion. By combining collaborative positioning techniques an
 d robust interference mitigation\, this talk will showcase advancements th
 at improve GNSS precision and resilience.
CATEGORIES:Département BioSiS,Séminaires projet SiMul
LOCATION:CRAN - FST - 4ème\, Campus Sciences\, Boulevard des Aiguillettes\
 , Vandoeuvre-lès-Nancy\, 54506\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Campus Sciences\, Boulevard
  des Aiguillettes\, Vandoeuvre-lès-Nancy\, 54506\, France;X-APPLE-RADIUS=
 100;X-TITLE=CRAN - FST - 4ème:geo:0,0
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