A New Tracking Loop Scheme for High Dynamics Real-Time GNSS Receivers with Hardware Correlators

In this paper the implementation of one-delay carrier tracking loops in GNSS receivers that utilized hardware correlators is proposed. The previously adopted two-delay solutions were justified in the necessity of providing a phase reference to the correlator before the beginning of the correlation i...

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Detalles Bibliográficos
Autores principales: Roncagliolo, Pedro Agustín, García, Javier Gonzalo
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2016
Materias:
Ingeniería Electrónica
GNSS
Hardware
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/112787
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-112787
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería Electrónica
GNSS
Hardware
spellingShingle Ingeniería Electrónica
GNSS
Hardware
Roncagliolo, Pedro Agustín
García, Javier Gonzalo
A New Tracking Loop Scheme for High Dynamics Real-Time GNSS Receivers with Hardware Correlators
topic_facet Ingeniería Electrónica
GNSS
Hardware
description In this paper the implementation of one-delay carrier tracking loops in GNSS receivers that utilized hardware correlators is proposed. The previously adopted two-delay solutions were justified in the necessity of providing a phase reference to the correlator before the beginning of the correlation interval. However, this constraint can be relaxed by utilizing other phase reference and compensating the resulting correlation value accordingly after its computation. The proposed one-delay loop implementation is particularly useful for high dynamics conditions and therefore the UFA-PLL structure associated with an optimal digital loop filter was adopted for the analysis presented in this work. The optimum digital loop filter structures, previously derived for the case of two-delay carrier tracking loops, are updated under the one-delay condition. The obtained results are quite similar, with the novelty that the extra pole present in the former solution is not present any more. Two particular cases are analyzed by simulation to determine the pull-out performance and the associated tracking thresholds. First, a loop with correlation time of T = 10ms is shown to be able to track acceleration steps of 20g with similar performance than the previously obtained using two-delay implementations with T = 5ms and the same 75.6Hz bandwidth. In this case, doubling the correlation time imply a great reduction in the computational burden. Secondly, the same pull-out performance is shown in two T = 10ms loops, one with two delays and 37.8Hz bandwidth and the other with one delay and 19.8Hz bandwidth. In this case, half bandwidth imply half variance of the estimated phase, which is equivalent to an improvement of 3dB in the signal to noise ratio.
format Objeto de conferencia
Objeto de conferencia
author Roncagliolo, Pedro Agustín
García, Javier Gonzalo
author_facet Roncagliolo, Pedro Agustín
García, Javier Gonzalo
author_sort Roncagliolo, Pedro Agustín
title A New Tracking Loop Scheme for High Dynamics Real-Time GNSS Receivers with Hardware Correlators
title_short A New Tracking Loop Scheme for High Dynamics Real-Time GNSS Receivers with Hardware Correlators
title_full A New Tracking Loop Scheme for High Dynamics Real-Time GNSS Receivers with Hardware Correlators
title_fullStr A New Tracking Loop Scheme for High Dynamics Real-Time GNSS Receivers with Hardware Correlators
title_full_unstemmed A New Tracking Loop Scheme for High Dynamics Real-Time GNSS Receivers with Hardware Correlators
title_sort new tracking loop scheme for high dynamics real-time gnss receivers with hardware correlators
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/112787
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