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Hybrid Acquisition of CBOC Galileo Signals under Multiple Correct-window Hypothesis

Authors:
Elena Simona Lohan
Alexandru Rusu-Casandra
Ion Marghescu

Keywords: unambiguous code acquisition, Galileo, hybrid search, multiple correct-window hypothesis

Abstract:
This paper computes the mean acquisition time for a hybrid search acquisition stage of Galileo signals, under the assumption of multiple correct windows in the search space. The assumption of multiple correct windows is a realistic assumption both in single and multipath-fading channels, due to the fact that the width of the main lobe of the correlation envelope is at least 2 chips (depending on the receiver front-end bandwidth) and the time-bin step of scanning the multiple code phases is typically below 0.5 chips. The multiple-window hypothesis acquisition is poorly addressed in the Code Division Multiple Access (CDMA) literature, and the comparison of multiple-dwell acquisition strategy is completely novel in the Global Navigation Satellite System (GNSS) literature, to the best of the authors’ knowledge. One of the main results of the paper is that choosing an increased false alarm probability per dwell when going from one dwell to the next one, in conjunction with an increasing integration time, offers better results for the mean acquisition time.

Pages: 91 to 96

Copyright: Copyright (c) IARIA, 2011

Publication date: April 17, 2011

Published in: conference

ISSN: 2308-4480

ISBN: 978-1-61208-128-1

Location: Budapest, Hungary

Dates: from April 17, 2011 to April 22, 2011