Velocity estimation of fast moving targets using undersampled SAR raw-data
The paper presents a new methodology to retrieve slant-range velocity estimates for moving targets which induce a Doppler-shift beyond the Nyquist limit determined by the Pulse Repetition Frequency (PRF). The proposed scheme takes advantage of the fact that the range velocity of a moving target induces a Doppler-shift in the azimuth spectra which depends linearly on the fast-time frequency. We present results that take real and simulated SAR data.