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Efficient time of arrival estimation in the presence of multipath propagation
Guilhem Villemin1, Caroline Fossati, Salah Bourennane
1CNRS-UMR 7249 / Fresnel Institute, Ecole Centrale Marseille, Aix-Marseille Université, D.U. de Saint-Jéro^me, 13397 Marseille Cedex 20, France guilhem.villemin@fresnel.fr, caroline.fossati@fresnel.fr, salah.bourennane@fresnel.fr.
Abstract:
Most of acoustical experiments face multipath propagation issues. The times of arrival of different ray paths on a sensor can be very close. To estimate them, high resolution algorithms have been developed. The main drawback of these methods is their need of a full rank spectral matrix of the signals. The frequential smoothing technique overcomes this issue by dividing the received signal spectrum into several overlapping sub-bands. This division yields a transfer matrix that may suffer rank deficiency. In this paper, a new criterion to optimally choose the sub-band frequencies is proposed. Encouraging results were obtained on real-world data.
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