Attribute Scattering Center Extracting Method Based on Time-Frequency Representations

This article presents a new approach to extract attribute scattering center (ASC) of radar model, which can extract ASC with only single frequency sweep angle RCS data. In order to analyze Doppler frequency characteristics in time-frequency representations (TFR), we use smooth pseudo Wigner Ville distribution(SPWVD) to analyze local scattering center (LSC) and distribute scattering center (DSC). Inverse Radon transform (IRT) is used to estimate parameters in LSC model, and DSC parameters are directly calculated from TFR, and the scatter center results are compared with target model in a figure, and RCS is rebuilt with ASC model, which show this method can extract scattering center in a effectively and accurate way.