On the application of pattern recognition to identification of simple targets based on resonance and polarization diversity

In this paper, target radar features based on extracting the polarization matrix of each of the radar target´s complex natural resonances (CNRs) in the time domain is investigated. These resonance frequencies and their complex residues (amplitudes) in a co- and cross-polar configuration form a polarization matrix decomposition of the target in late time and are also related to the principal dimensions of the target and their relative physical orientation. We have developed and investigated new radar target features, whereby, for incident circular polarization we generate horizontal and vertical complex residue patterns for each known target at the first few dominant resonance frequencies over a number of aspect angles.