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Sensitivity characterization of differential detectors for acquisition of weak GNSS signals

Esteves, Paulo and Sahmoudi, Mohamed and Boucheret, Marie-Laure Sensitivity characterization of differential detectors for acquisition of weak GNSS signals. (2016) IEEE Transactions on Aerospace and Electronic Systems, 52 (1). 20-37. ISSN 0018-9251

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Official URL: http://dx.doi.org/10.1109/TAES.2015.130470


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.

Item Type:Article
Additional Information:Thanks to IEEE editor. The definitive version is available at http://ieeexplore.ieee.org The original PDF can be found at IEEE Transactions on Aerospace and Electronic Systems (ISSN 0018-9251) website : http://ieeexplore.ieee.org/document/7444029/ Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
HAL Id:hal-01466634
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Laboratory name:
Deposited On:25 Jan 2017 13:26

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