Positioning Using OFDM-based Digital TV: New Algorithms and Tests with Real Signals

Damien Serant, Olivier Julien, Christophe Macabiau, Lionel Ries, Paul Thevenon, Mathieu Dervin, Marie-Laure Boucheret

Abstract:	Indoor and urban positioning is an important market which is foreseen to grow significantly in the future years. Unfortunately, in indoor and urban environment the classical mean of positioning based on Global Navigation Satellite Systems (GNSS), has a limited availability and accuracy due difficult multipath conditions and signal blockage by buildings. One alternative that has been explored in the recent years is the use of Signal-of-Opportunities (SoO), such as Wi-Fi, mobile telephony, radio or television signals. Among all SoO available in the air, those based on the popular Orthogonal Frequency Division Multiplexing (OFDM) modulation has been chosen in this work. To demonstrate the potential of OFDM signal for positioning, the work presented on this paper focuses on, as a study case, the European standard for digital TV DVB-T. This paper presents the developed pseudorange estimation method using DVB-T signal. To assess its performance on real signal, a flexible and low-cost test bench has been designed to record and post-process TV signals. The results of two tests on real signals, in two emitters configurations, are finally proposed, showing very good and promising results and demonstrating the potential of OFDM signal to be used as a SoO.
Published in:	Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011) September 20 - 23, 2011 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	3451 - 3460
Cite this article:	Serant, Damien, Julien, Olivier, Macabiau, Christophe, Ries, Lionel, Thevenon, Paul, Dervin, Mathieu, Boucheret, Marie-Laure, "Positioning Using OFDM-based Digital TV: New Algorithms and Tests with Real Signals," Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011), Portland, OR, September 2011, pp. 3451-3460.
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