Detection in presence of reverberation

This article presents three methods of detection in presence of reverberation. Two of them consider reverberation as a colored and non stationary noise. Furthermore, reverberation is assumed locally stationary. This allows to build the first algorithm which is called a block normalized matched filter. The second method includes a whitening step to improve detection. The third method sees reverberation as a sum of multiple echoes issued from the transmitted signal; we use the principal component inverse algorithm to estimate reverberation in order to cancel it. This last method needs prior knowledge about the target power. Moreover, this power must be small compared to the reverberation power. The three methods are tested and compared on real reverberation noise in active sonar.