Moving target imaging for the modulated frequency stepped pulse radar signal

To reduce the loss of sampling, higher sampling frequency than bandwidth of chirp must be adopted for the modulated frequency stepped pulse (MFSP) radar signal which will bring on over-sampling result of pulse compression for chirp. So the pick-up algorithm for MFSP radar signal must be adopted to eliminate target's redundancy in order to obtain fine HRRP (high-resolution range profile). However; because of the inaccuracy of the velocity compensation method, the velocity error of the moving target will produce velocity-range coupling error, even making the HRRP not be obtained. This paper proposes a HRRP pick-up algorithm based on the offset of the most powerful scatterer, which could solve the velocity-range coupling error effectively by modifying pick-up ranges of all sampled points. The simulation results prove tie validation of the theoretical analysis.