Centre dedocumentation
scientifique

A fresh look at GNSS anti-jamming / Daniele Borio in Inside GNSS, vol 12 n° 5 (September - October 2017)  

Public [article]  inInside GNSS > vol 12 n° 5 (September - October 2017) . - pp 54 - 61 Titre : A fresh look at GNSS anti-jamming Type de document : Article/Communication Auteurs : Daniele Borio, Auteur ; Pau Closas, Auteur Année de publication : 2017 Article en page(s) : pp 54 - 61 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal [Termes IGN] anti-leurrage [Termes IGN] brouillage [Termes IGN] estimation de position [Termes IGN] interférence [Termes IGN] méthode robuste [Termes IGN] mitigation [Termes IGN] signal GNSS Résumé : (auteur) Although strong jamming can overwhelm much weaker GNSS signals, receiver performance can be significantly improved by implementing interference mitigation techniques. With this article we briefly discuss the most common approaches for interference mitigation and frame them with respect to the principles of Interference Cancellation (IC) and robust estimation. Additionally, we present initial results obtained using Robust Transform Domain (RTD) mitigation techniques. These techniques provide effective alternatives to Transform Domain excision, enabling receiver operations in the close proximity of a jammer. Numéro de notice : A2017-583 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://www.insidegnss.com/node/5618 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86718 [article]

SMAP L-Band microwave radiometer: RFI mitigation prelaunch analysis and first year on-orbit observations / Priscilla N. Mohammed in IEEE Transactions on geoscience and remote sensing, vol 54 n° 10 (October 2016)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 54 n° 10 (October 2016) . - pp 6035 - 6047 Titre : SMAP L-Band microwave radiometer: RFI mitigation prelaunch analysis and first year on-orbit observations Type de document : Article/Communication Auteurs : Priscilla N. Mohammed, Auteur ; Mustafa Aksoy, Auteur ; Jeffrey R. Piepmeier, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 6035 - 6047 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal [Termes IGN] acquisition de données [Termes IGN] bande L [Termes IGN] glace [Termes IGN] humidité du sol [Termes IGN] interférence [Termes IGN] mission SMAP [Termes IGN] mitigation [Termes IGN] radiomètre à hyperfréquence Résumé : (auteur) The National Aeronautics and Space Administration's (NASA) Soil Moisture Active and Passive (SMAP) mission, which was launched on January 31, 2015, is providing global measurements of soil moisture and freeze/thaw state. The SMAP radiometer operates within the protected Earth Exploration Satellite Service passive frequency allocation of 1400-1427 MHz. However, unauthorized in-band transmitters and out-of-band emissions from transmitters operating at frequencies adjacent to this allocated spectrum are known to cause interference to microwave radiometry in this band. Because measurement corruption by these terrestrial transmissions, which is referred to as radio-frequency interference (RFI), threatens mission success, the SMAP radiometer includes special flight hardware to enable the detection and filtering of RFI. Results from the first year of SMAP data show the presence of RFI with frequent occurrence over Asia and Europe. During the calibration/validation stage of the mission, the RFI detection and mitigation algorithms were modified to provide enhanced performance. Analysis of the L1B_TB products indicates good algorithmic performance with respect to RFI detection and removal. However, some regions of the globe (e.g., Japan) continue to experience complete data loss. This paper summarizes updates to the SMAP RFI processing algorithms based on prelaunch tests and on-orbit measurements, as well as RFI information obtained in SMAP's first year on orbit. Numéro de notice : A2016-867 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2016.2580459 En ligne : https://doi.org/10.1109/TGRS.2016.2580459 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82907 [article]

Interference mitigation in the E5A Galileo band using an open-source simulator / Diego Alonso in Inside GNSS, vol 11 n° 4 (July - August 2016)  

Public [article]  inInside GNSS > vol 11 n° 4 (July - August 2016) Titre : Interference mitigation in the E5A Galileo band using an open-source simulator Type de document : Article/Communication Auteurs : Diego Alonso, Auteur ; Nunzia Giorgia Ferrara, Auteur ; Jari Nurmi, Auteur ; Elena Simona Lohan, Auteur Année de publication : 2016 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal [Termes IGN] interférence [Termes IGN] mitigation [Termes IGN] signal Galileo Résumé : (éditeur) Researchers describe the result of investigations into three narrowband interference mitigation methods based on time and frequency processing and compare them in terms of signal acquisition and tracking performance. Numéro de notice : A2016-600 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://www.insidegnss.com/node/5020 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81783 [article]

A study on the dependency of GNSS pseudorange biases on correlator spacing / André Hauschild in GPS solutions, vol 20 n° 2 (April 2016)  

Public [article]  inGPS solutions > vol 20 n° 2 (April 2016) . - pp 159 - 171 Titre : A study on the dependency of GNSS pseudorange biases on correlator spacing Type de document : Article/Communication Auteurs : André Hauschild, Auteur ; Oliver Montenbruck, Auteur Année de publication : 2016 Article en page(s) : pp 159 - 171 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] correction du trajet multiple [Termes IGN] corrélation [Termes IGN] erreur systématique [Termes IGN] mesurage de pseudo-distance [Termes IGN] mitigation [Termes IGN] puce [Termes IGN] récepteur GNSS [Termes IGN] signal GNSS [Vedettes matières IGN] Traitement de données GNSS Résumé : (Auteur) We provide a comprehensive overview of pseudorange biases and their dependency on receiver front-end bandwidth and correlator design. Differences in the chip shape distortions among GNSS satellites are the cause of individual pseudorange biases. The different biases must be corrected for in a number of applications, such as positioning with mixed signals or PPP with ambiguity resolution. Current state-of-the-art is to split the pseudorange bias into a receiver- and a satellite-dependent part. As soon as different receivers with different front-end bandwidths or correlator designs are involved, the satellite biases differ between the receivers and this separation is no longer practicable. A test with a special receiver firmware, which allows tracking a satellite with a range of different correlator spacings, has been conducted with live signals as well as a signal simulator. In addition, the variability of satellite biases is assessed through zero-baseline tests with different GNSS receivers using live satellite signals. The receivers are operated with different settings for multipath mitigation, and the changes in the satellite-dependent biases depending on the receivers’ configuration are observed. Numéro de notice : A2016-610 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1007/s10291-014-0426-0 En ligne : http://dx.doi.org/10.1007/s10291-014-0426-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81807 [article]

Developing a GNSS position and timing authentication testbed: GNSS vulnerability and mitigation techniques / Oscar Pozzobon in Inside GNSS, vol 8 n° 1 (January - February 2013) 

Public [article]  inInside GNSS > vol 8 n° 1 (January - February 2013) . - pp 45 - 53 Titre : Developing a GNSS position and timing authentication testbed: GNSS vulnerability and mitigation techniques Type de document : Article/Communication Auteurs : Oscar Pozzobon, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 45 - 53 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] mitigation [Termes IGN] positionnement par GNSS [Termes IGN] sécurité [Termes IGN] vulnérabilité Résumé : (Auteur) Ensuring the authenticity of position and time services is becoming a major requirement in many GNSS applications, demonstrating the need of tools to support the design, testing, and validation of protection mechanisms at the user and system levels. This work describes the architecture of the GNSS Authentication and User Protection System Simulator (GAUPSS), an innovative testbed that uses software to control hardware equipment and capable of creating realistic scenarios for GNSS threats. The testbed is designed to expose weaknesses of detection mechanisms in user equipment, test the effectiveness of new receiver-based mitigation techniques, and support analysis of system-level schemes to guarantee the authenticity of received signals. Preliminary results from a validation campaign are presented in this work. Numéro de notice : A2013-165 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32303 [article]

Documents numériques

peut être téléchargé a2013-165_developing_a_gnss_testbed_pozzobon.pdf Adobe Acrobat PDF

Confronting urban earthquakes / Kenzo Toki (2000)

Permalink