Characterization of radar targets in resonance domain with a reduced number of natural poles

In resonance domain, the radar scattering response can be modeled by natural poles of resonance, with the formalism of the singularity expansion method. The mapping of poles gives useful information for the discrimination of radar targets. In this paper, we show that a reduced number of poles is sufficient to characterize an object. Furthermore, we propose a procedure for selecting poles actually contributing to the scattering response. Results are presented for different canonical targets