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Multipath parameter estimation of linear chirp signals using sensor arrays

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3 Author(s)
Aouada, R. ; Electr. Eng. Dept., Ecole Nationale Polytechnique, Algiers, Algeria ; Belouchrani, A. ; Abed-Meraim, K.

We consider the problem of estimating the parameters of linear chirp signals when received at a multi-sensor antenna. Exploiting the negligible variation of the parameters of interest over the coherence time of the channel, we derive a new data model that outlines the space-time relation between the parameters. In the case of multiple chirps and single-path channels, the derived model allows the estimation of more signals than antennas. The model is directly employed in the case of a single chirp in multipath. Where angles of arrival can be retrieved if more antennas than paths are available. We use a MUSIC-based estimator to recover the unknown parameters and compare its performance through simulations against the Cramer-Rao bound.

Published in:

Sensor Array and Multichannel Signal Processing Workshop Proceedings, 2004

Date of Conference:

18-21 July 2004