Simple algorithm for classification of target in shallow water

Abstract

When applying classification algorithms to the scattering response of a target in shallow water, algorithms that attempt to deconvolve the free field target response from the environment, such as modal decomposition or time reversal, typically require multiple receivers. A simple algorithm is applied here that requires a single source and a single receiver. The impulse response of the target is Fourier transformed to the frequency domain; the magnitude of the frequency domain response is transformed back to the time domain; the resultant time domain response is truncated. The algorithm is applied to a hemispherically end-capped cylindrical shell under various shallow water conditions. The response obtained for the target in shallow water is correlated against the target free field response. [Work supported by ONR.]