Abstract
Abstract A method for recognizing targets at any aspect angle is proposed using polarized, radar‐backscatter measurements. The measurements are taken at wavelengths commensurate with significant target‐body dimensions; i.e., near body resonance. The method applies to targets of arbitrary shape that cannot deform, such as missiles. The objects can be of arbitrary size and refractive index. The method is easily extended to the recognition of classes of objects that differ only by a scale factor in size. This is accomplished by scanning the radar frequency and making feature comparisons against stored libraries of features taken at several wavelengths. These torus‐like‐surface feature libraries are described by use of an n‐dimensional chain code, and a quantization interval for the classification space is specified according to the spatial frequency spectra of these toroids.
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