Analysis and extraction of micro-doppler features in FMCW-ISAR using a Modified Extended Hough Transform

The micro-Doppler (m-D) features of targets based on the FMCW-ISAR is analysed in this paper. The influence of the Doppler frequency shift induced by the target's continuous moving in pulse repetition interval (PRI) is discussed, and then a method named Modified Extended Hough Transform is proposed to extract the parameters of m-D features from the spectrogram. The simulation experiment validates the theoretical conclusions in m-D features analysing, and m-D features extraction.