Abstract: Abstract This paper presents the analysis and process of a set of actual wideband radar returns, which are collected by a high-resolution X-band radar with the bandwidth of 1GHz in a scenario of cloverleaf junction in a city. First, the amplitude distribution and Doppler spectrum of the clutter are analyzed, and a power-law form empirical Doppler spectrum is obtained. In the sequence, the wideband radar returns are processed by Doppler processing and Chirp-Z transform in sub-band domain for clutter suppression, Doppler dispersion compensation and coherent integration the target returns. The results show that this processing method reduced the clutter power significantly and enhanced the target returns.