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Doppler-aided positioning in GNSS receivers - A performance analysis
- Source :
- Signal Processing, Signal Processing, Elsevier, 2020, 176, pp.107713-107724. ⟨10.1016/j.sigpro.2020.107713⟩
- Publication Year :
- 2020
-
Abstract
- International audience; The main objective of Global Navigation Satellite Systems (GNSS) is to precisely locate a receiver based on the reception of radio-frequency waveforms broadcasted by a set of satellites. Given delayed and Doppler shifted replicas of the known transmitted signals, the most widespread approach consists in a two-step algorithm. First, the delays and Doppler shifts from each satellite are estimated independently, and sub- sequently the user position and velocity are computed as the solution to a Weighted Least Squares (WLS) problem. This second step conventionally uses only delay measurements to determine the user position, although Doppler is also informative. The goal of this paper is to provide simple and meaningful ex- pressions of the positioning precision. These expressions are analysed with respect to the standard WLS algorithms, exploiting the Doppler information or not. We can then evaluate the performance improve- ment brought by a joint frequency and delay positioning procedure. Numerical simulations assess that using Doppler information is indeed effective when considering long observation times, and particularly useful in challenging scenarios such as urban canyons (constrained satellite visibility) or near indoor sit- uations (weak signal conditions which need long integration times), thus providing new insights for the design of robust and high-sensitivity receivers.
- Subjects :
- Computer science
Real-time computing
Fisher information matrix
02 engineering and technology
symbols.namesake
Position (vector)
0202 electrical engineering, electronic engineering, information engineering
Waveform
Traitement du signal et de l'image
Electrical and Electronic Engineering
GNSS Positioning
Cramér-Rao Bound
GNSS
Harsh Propagation conditions
Multilateration
020206 networking & telecommunications
Fisher Information Matrix
High-sensitivity
Nautische Systeme
Control and Systems Engineering
GNSS applications
Signal Processing
symbols
020201 artificial intelligence & image processing
Satellite
Computer Vision and Pattern Recognition
Harsh propagation conditions
Doppler effect
[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Software
Positioning
Cramér-Rao bound
Subjects
Details
- Language :
- English
- ISSN :
- 01651684 and 18727557
- Database :
- OpenAIRE
- Journal :
- Signal Processing, Signal Processing, Elsevier, 2020, 176, pp.107713-107724. ⟨10.1016/j.sigpro.2020.107713⟩
- Accession number :
- edsair.doi.dedup.....e391549a69d53e4ff0cfa2c8405e9867