On the analysis of electromagnetic transients from radar targets using smooth pseudo wigner-ville distribution (SPWVD)

Time frequency analysis of electromagnetic transients scattered from wire radar targets has been investigated. The results demonstrate that the SPWVD is capable to providing another level of confirmation on the existence of particular resonant modes when the incident aspect and polarization changes, and graphically indicates whether a particular angle will excite a relevant mode. Such kind of information becomes critical for automatic target recognition (ATR) problems where the incidence angle(s) is usually not known in advance. Further work will be focused on applying the technique to more realistic targets, using another TF distribution which provides better time resolution for the early time. Using the combined information, a hybrid target identification scheme that makes use of the information from TF plots in conjunction with resonance based model will be constructed.