Abstract: Traditional clutter suppression is inapplicable to the wideband radar due to the migration through resolution cells during coherent echoes. In this paper, a new method for clutter suppression in the frequence-doppler domain is proposed for the wideband radar. If the target velocity is acquired, it can be utilized to perform the velocity compensation and then the extraction of target information; without the target velocity, the improved Hough transform algorithm is proposed to extract target information, which is equivalent to accomplishing clutter suppression.Meanwhile, the proposed method is able to avoid the loss of target information during clutter suppression. Experimental results on simulated data demonstrate that our approach can provide a satisfying recognition performance, even though the input SCR is -10dB(with the velocity unknown) or -15dB (with the velocity known). Furthermore, the algorithms are still robust to the noise even at -5dB SNR.

Key words: high-resolution range profile (HRRP), clutter suppression, phase compensation, Hough transform, radar target recognition