Open Access

A Reconfigurable GNSS Acquisition Scheme for Time-Frequency Applications

EURASIP Journal on Advances in Signal Processing20082008:356267

https://doi.org/10.1155/2008/356267

Received: 11 November 2007

Accepted: 11 June 2008

Published: 23 June 2008

Abstract

The extreme weakness of global navigation satellite system (GNSS) signals makes them vulnerable to almost every kind of interferences that, without adequate countermeasures, can heavily compromise the receiver performance. An effective solution is represented by time-frequency (TF) analysis that has proved to be able to detect and suppress a wide class of disturbing signals. However, high computational requirements have limited the diffusion of such techniques for GNSS applications. In this paper, we propose an effective solution for the efficient implementation of TF techniques on GNSS receivers. The solution is based on the key observation that the first block of a GNSS receiver, the acquisition stage, implicitly performs a sort of TF analysis. Thus, a slight modification in the traditional acquisition scheme enables the fast and efficient implementation of TF techniques for interference detection. The proposed method is suitable for different types of acquisition scheme and its effectiveness is proved by simulations and examples on real data.

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Authors’ Affiliations

(1)
Department of Geomatics Engineering, University of Calgary
(2)
Dipartimento di Elettronica, Politecnico di Torino

Copyright

© D. Borio and L. Lo Presti. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.