Three-dimensional imaging for UWB though-the-wall radar

In through-the-wall imaging, the three-dimensional (3D)imaging results are much more efficient in detecting and identifying targets than two-dimensional imaging results. To getting the high-quality imaging results, the 3-D BP imaging method is adapted and the crucial problem about the signal propagation delay is rigorously derived. Based on the derivation results, a compensation method is proposed for refocusing the targets in 3D imaging application. By using this method, the effects of the wall can be compensated and more accurate information of the targets can be obtained. Experimental data processing results validate the conclusion of this paper.