Motion estimation of micro-motion targets with translational motion

This paper models the echo returned from a micro-motion target with translational motion as the hybrid sinusoidal frequency-modulated and polynomial-phase signal (SinFM-PPS). We decouple the SinFM component from the PPS one, relying on the properties of the multi-lag high-order ambiguity function (ml-HAF), then employ the time-frequency distribution(TFD)-Hough transform to get robust estimation of the parameters of the two signal components. The simulation results show the validity of our proposed algorithm.