Sensitivity characterization of differential detectors for acquisition of weak GNSS signals

Abstract : In this paper, we assess the potential of several forms of the postcoherent differential detectors for the detection of weak Global Navigation Satellite Systems (GNSS) signals. We analyze in detail two different detector forms, namely the pair-wise differential detector (PWD) and noncoherent differential detector (NCDD). First, we follow a novel approach to obtain analytic expressions to characterize statistically the PWD. Then, we use these results to propose a polynomial-like model fitted by simulation to the sensitivity loss experienced by the differential operation with respect to coherent summing. This sensitivity loss formula is also used to characterize the NCDD, which is shown to be more adequate than the PWD for the acquisition of GNSS signals. A comparison between the PWD, NCDD, and the traditional noncoherent detector (NCD) is also carried out in this study. The results highlight the superior performance of the NCDD over the NCD for the acquisition of weak signals. For the case of the PWD, its performance is sensitive to Doppler shift. The conclusions drawn from the simulation results are confirmed in the acquisition of real Global Positioning System L1 C/A signals.
Type de document :
Article dans une revue
IEEE Transactions on Aerospace and Electronic Systems, Institute of Electrical and Electronics Engineers, 2016, vol. 52 (n° 1), pp. 20-37. 〈10.1109/TAES.2015.130470〉
Liste complète des métadonnées

Littérature citée [14 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01466634
Contributeur : Open Archive Toulouse Archive Ouverte (oatao) <>
Soumis le : lundi 13 février 2017 - 16:24:16
Dernière modification le : mercredi 12 septembre 2018 - 17:46:03
Document(s) archivé(s) le : dimanche 14 mai 2017 - 15:04:23

Fichier

esteves_17184.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Paulo Esteves, Mohamed Sahmoudi, Marie-Laure Boucheret. Sensitivity characterization of differential detectors for acquisition of weak GNSS signals. IEEE Transactions on Aerospace and Electronic Systems, Institute of Electrical and Electronics Engineers, 2016, vol. 52 (n° 1), pp. 20-37. 〈10.1109/TAES.2015.130470〉. 〈hal-01466634〉

Partager

Métriques

Consultations de la notice

83

Téléchargements de fichiers

93