Blind deconvolution of underwater channel using transitory signal processing

A modern method for acoustic underwater channel characterization is the passive tomography concept. The technique relies on the use of opportunity sources thus avoiding the use of dedicated active sources. Co-operative source for passive tomography stands for a source of known position radiating an unknown self noise. Then passive tomography is called aided passive tomography. In this paper, we address the problem of aided passive tomography using a single sensor allowing to an efficient passive real time system. A single sensor blind broadband processing is developed based on Time-Frequency analysis and it is dedicated for transient source in nondispersive channel. The processing method for the estimation of the impulse channel response is based on the high order ambiguity time-frequency methods. The results on simulated data and comparison with Cramer-Rao bound will be also devised.