Compensation of wall effects is the key problem of Synthetic Aperture Radar (SAR) in through-the-wall imaging.Wall parameters are usually unknown

which are essential for wall effects compensation.In this paper

an approach to compensate wall effects in the image domain is proposed on the quantitative analysis of the wall effects on focusing and locating of behind-the-wall targets.The proposed method estimates the wall parameters from the image formed by traditional image formations and its filtered results

which has the advantages of high precision and low computational burden.It is validated that the proposed method can precisely focus and locate behind-the-wall targets using simulated data.