Two new categories of shift-invariant features of high-resolution radar range profiles

We propose two categories of shift-invariant features for high-resolution radar range profiles. One category consists of the optimally shifted range profiles (OSRP) derived by a method called autoaligning, which aligns range profiles to common reference positions that are flexibly defined on the range axis. The other category, the accumulated bispectral features (ABF), is derived by accumulating the bispectra of the range profiles along circles centered at the origin. The performances of the proposed features are evaluated using a data set of three scaled aircraft models. The experimental results show that the correct aligning ratio of the autoaligning method increases by roughly 100% over the scattering centroid method, and that ABF possess higher separability than FT magnitudes