The use of stochastic matched filter in active sonar

In this present study we propose to evaluate a kind of matched filter, called "stochastic matched filter”, first described by J-F Cavassilas and originated to detect short stationary stochastic “pulses” in stationary noise. We can show in this paper that this filter, with minor changes in its definition, can be applied on frequency time-varying signals, such as wide band modulated sonar signal propagated in shallow water. The stochastic matched filter is able to take into account uncertainties and variations of the propagation channel, thus enhancing the detection efficiency. The main characteristics of this treatment is shown up with simulated data.