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Counting equivalent correlators: quantifying the number for GNSS acquisition engine architectures / A. Genghi in GPS world, vol 20 n° 1 (January 2009)

Public [article]  inGPS world > vol 20 n° 1 (January 2009) . - pp 39 - 65 Titre : Counting equivalent correlators: quantifying the number for GNSS acquisition engine architectures Type de document : Article/Communication Auteurs : A. Genghi, Auteur ; J. Brenner, Auteur ; F. Spalla, Auteur Année de publication : 2009 Article en page(s) : pp 39 - 65 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] acquisition de données [Termes IGN] covariance [Termes IGN] positionnement par géodésie spatiale [Termes IGN] puce [Termes IGN] qualité instrumentale [Termes IGN] récepteur Galileo [Termes IGN] récepteur GNSS [Termes IGN] récepteur GPS Résumé : (Auteur) Many GNSS chip manufacturers software houses, when announcing a new product, include a part of the specifications the numbers of equivalents correlators that boost the power of their acquisition engine. This number is one of the most important figures of merit for a GNSS receiver, especially when compared to the number of physical correlators. Nevertheless, it is not easily defined. Furthermore, this number is often dictated by engineering needs rather than by engineering measurements. It is quite obvious that this number is proportional to the sensitivity of the receiver and inversely proportional to the time to first fix (TTFF), but a precise relationship is difficult to find. In fact, the number of equivalent correlators depends not only on the baseband processing architecture but also on the firmware/software acquisition scheme. Also, this parameter has an intrinsic logarithmic relationship with the sensivity parameter, also it is not obvious to everyone in the GNSS community. In this article, we examine these issues and propose a means to quantify the number of equivalent correlators for traditional GPS receiver architectures. We extend the methodology to the latest architectures for high-sensitivity GPS receivers and for Galileo signal tracking. Copyright Questex Media Group Inc Numéro de notice : A2009-002 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29632 [article]

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