Study of bispectrum signatures of radar targets andclassification techniques
Ji Young Hong · Jounal of Xidian University · 1999
A bispectrum analysis of real target echoes based on conventional coherent radar is made using the complex bispecturm estimation. The useful facts are revealed that the target echoes are typical non Gaussian signals and that the bispectrum distribution domain information effectively reflects the partial scattering modulation signature of targets, which can be used as the signature for target classification. On the basis of this, a method is proposed for bispectrum signature extraction and template construction. By making use of the binary signature image created by thresholding the bispectrum, a “Core” and a “Domain” are defined to represent the generality of bispectrum and its distribution domain, with a template being constructed by them. Finally, the effectiveness of this method in both classification and signature dimensionality reduction is illustrated with some experiments on real target echoes.