Characterizing Coated Objects with Radar Identification System using Short-time Matrix Pencil Method

This paper presents a radar target identification of a coated object. Based on the singularity expansion method, poles extracted from the received backscattering signal by using a short-time matrix pencil method were used as the object's signatures for identification. Simulation examples were illustrated in order to study on identification of a coated object. The antenna effect was taken into account and then mitigated by using a calibration technique. In simulations, the PEC sphere object was coated with dielectrics whose thickness was varied in order to investigate the behavior of extracted pole and the commencements of the late-time response of each object's layer. Simulation results showed that extracted poles obtained from the use of a short-time matrix pencil method can identify the PEC object coated with the dielectrics.