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Article de conférence

Subband Decomposition and Frequency Warping for Spectral Estimation

Auteurs : Bonacci David, Michel Patrice et Mailhes Corinne

In Proc. European Signal and Image Processing Conference (EUSIPCO), Toulouse, France, September 3-6, 2002.

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Subband decomposition has already been shown to increase the performances of spectral estimation but induced frequency overlapping may be troublesome, bringing edge effects, when spectral estimation is applied after subband decomposition and decimation. This paper proposes a new spectral estimation procedure based on subband decomposition and frequency warping which reduces the overlapping frequency problem. Simulation results confirm the interest of this new algorithm.

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Traitement du signal et des images / Autre

Spectral Estimation Using Subband Decomposition and Frequency Warping

Auteurs : Bonacci David, Michel Patrice et Mailhes Corinne

In Proc. Int. Conf. Acoust., Speech and Signal Processing (ICASSP), Orlando, Florida, May 13-17, 2002.

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This paper addresses the problem of frequency overlapping which occurs when spectral estimation is applied after subband decomposition. Subband decomposition has already been shown to increase the performances of spectral estimation but induced frequency overlapping may be troublesome. This paper proposes a new spectral estimation procedure based on sub band decomposition and frequency warping which reduces the overlapping frequency problem. Simulations confirm the interest of this new algorithm.

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Traitement du signal et des images / Autre

A New Air Traffic Complexity Metric Based on Dynamical System Modelization

Auteurs : Delahaye Daniel, Paimblanc Philippe, Histon Jonathan M. et Hansman R. John

In Proceedings of the 21st IEEE Digital Avionics Systems Conference, Volume 1, pp 4A2-1 - 4A2-12

This paper presents new concepts to address the air traffic complexity modeling problem. Two new geometrical metrics have been introduced and have been found very useful to capture typical features of traffic complexity. The covariance metric is very adapted to identify disorder in a set of speed vectors and can be applied for en route airspace (en route airspace is the airspace between airports). Similarly, the Koenig metric identifies easily the curl movement organizations and can be applied to areas around airports where air traffic control procedures impose turns on aircraft trajectories.

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Traitement du signal et des images / Systèmes de communication aéronautiques et Localisation et navigation

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