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Sensors 2016, 16(5), 624;

Implementation Strategies for a Universal Acquisition and Tracking Channel Applied to Real GNSS Signals

Electrical Department, École de Technologie Supérieure (ÉTS), Montréal, QC H3C 1K3, Canada
Author to whom correspondence should be addressed.
Academic Editor: Luis Javier Garcia Villalba
Received: 23 February 2016 / Revised: 17 April 2016 / Accepted: 20 April 2016 / Published: 2 May 2016
(This article belongs to the Special Issue Advances on Resources Management for Multi-Platform Infrastructures)
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This paper presents a universal GNSS receiver channel capable of tracking any civil GNSS signal. This fundamentally differs from dedicated channels, each customized for a given signal. A mobile device could integrate fewer universal channels to harvest all available signals. This would allow securing signal availability, while minimizing power consumption and chip size, thus maximizing battery lifetime. In fact, the universal channel allows sequential acquisition and tracking of any chipping rate, carrier frequency, FDMA channel, modulation, or constellation, and is totally configurable (any integration time, any discriminator, etc.). It can switch from one signal to another in 1.07 ms, making it possible for the receiver to rapidly adapt to its sensed environment. All this would consume 3.5 mW/channel in an ASIC implementation, i.e., with a slight overhead compared to the original GPS L1 C/A dedicated channel from which it was derived. After extensive surveys on GNSS signals and tracking channels, this paper details the implementation strategies that led to the proposed universal channel architecture. Validation is achieved using GNSS signals issued from different constellations, frequency bands, modulations and spreading code schemes. A discussion on acquisition approaches and conclusive remarks follow, which open up a new signal selection challenge, rather than satellite selection. View Full-Text
Keywords: GNSS; acquisition; tracking; modulation GNSS; acquisition; tracking; modulation

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Fortin, M.-A.; Landry, R., Jr. Implementation Strategies for a Universal Acquisition and Tracking Channel Applied to Real GNSS Signals. Sensors 2016, 16, 624.

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