Multi object concealed threat detection by late time response analysis

A new approach has been considered to detect threat item among multiple concealed objects by analyzing the delayed time-response of the objects, that would be illuminated by an ultra wide band radar. It was observed that the reflected wave, from the target, produced a delayed damped sinusoidal oscillation, that contained aspect independent complex natural resonances, which was unique for any individual object. A generalized pencil of function is applied for signal processing to extract poles from the scattered late time response of different objects. Application of hamming window function improves discrimination and detection of poles of multiple objects. Determination of the presence of a particular pole or concealed threat is observed upon using this proposed methodology.