Application of time frequency analysis methods in inverse scattering

Ramp response technique is reported in literature for extraction of profiles of underwater objects. This paper presents the application of time frequency analysis tools like STFT and Wigner Distributions (WD´s), in extraction of profiles of underwater objects from reflections (echo). The profile extracted at different reflected angles are used in generation of acoustic image of the object. This method is developed for extraction of profiles, mainly from short/medium transmitted pulses, that are of interest in practical applications. This method has been verified for various pulse parameters of the incident wave, like pulse frequency, pulse length, type of modulation (CW, LFM, SFM), sampling frequency, as well as different size and shape of the scattering body. The results for the simulated echoes are presented here.