Research on Single Frequency Radar Imaging with BP Algorithm

Abstract

In this letter, we address the Doppler back projection (BP) imaging algorithm for the single frequency continuous wave high resolution imaging. Unlike the existing imaging algorithm for narrow band signal, the Doppler information of targets is used for imaging, which makes up for the lack of range resolution. The concrete formula deduction and algorithm process are presented. By extracting the Doppler information of the target, the phase compensation and back projection imaging, we realize the accurate simulation of single point and multi point targets. The simulation results verify the targets can be well reconstructed. At last, We designed a measurement verification system based on the turntable model. Imaging experiments using measured data based on ideal trajectory has been done. The measurement results indicate the efficiency of the Doppler BP algorithm and implement imaging of point target in small scene.