Aiming at phenomenon of grating lobe occurred in de-chirp reception range profile synthesis algorithm in time-domain when stepped-frequency chirp signal has redundancy in frequency-domain,stitching algorithm in timedomain based-on grating lobe correction window is presented.According to bistatic features of radar,method of forming ideal grating lobe correction window by using signal which is attenuated and looped to receiving terminal directly from transmitting signal is presented; flow and simulation demon...