New formulation of GNSS acquisition with CFAR detection
| Autor: | Kamel Benachenhou, M’hamed Hamadouche, Abdelmalik Taleb-Ahmed |
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| Rok vydání: | 2016 |
| Předmět: |
020301 aerospace & aeronautics
Computer science business.industry Real-time computing Detector 020206 networking & telecommunications Context (language use) 02 engineering and technology Signal Constant false alarm rate 0203 mechanical engineering GNSS applications 0202 electrical engineering electronic engineering information engineering Media Technology Global Positioning System False alarm Electrical and Electronic Engineering Telecommunications business Fusion center |
| Zdroj: | International Journal of Satellite Communications and Networking. 35:215-230 |
| ISSN: | 1542-0973 |
| DOI: | 10.1002/sat.1177 |
| Popis: | Summary This paper deals with the analysis of the acquisition process performed by a global navigation satellite system (GNSS) receiver with a pilot and data channel or in case of GNSS hybrid receiver. Signal acquisition decides the presence or absence of GNSS signal by comparing signal under test with a fixed threshold and provides a code delay and a Doppler frequency estimation, but in low signal conditions or in a noisy environment; acquisition systems are vulnerable and can give a high false alarm and low detection probability. Firstly, we introduce a cell-averaging-constant false alarm rate (CFAR) then a data-pilot cell-averaging-CFAR detector fusion based to deal with these situations. In this context, we use a new mathematical derivation to develop a closed-form analytic expressions for the probabilities of detection and false alarm. The performances of the proposed detector are evaluated and compared with a non-CFAR case through an analytical and numerical results validated by Mont Carlo simulations. Copyright © 2016 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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