A new method of resolving multiple targets of low resolution radar

In active low-resolution radar, longitudinal resolution usually is more than one hundred meters and as high as several hundreds meters. Due to the short distance between planes which fly in a group, ordinary low resolution radar cannot distinguish them in both distance and azimuth. If we use the technology of ISAR to resolve the difference among Doppler frequencies of the targets and obtain a fine resolution cross-cross image, we may separate them, but a long coherent processing time is needed. In this paper, we exploit the graphics sharpness rule to estimate the motion parameter for one dimensional cross-range images of low resolution radar and compensate them for translational motion. Since coherent processing must not be overlong, we adopt the method of super-resolution to improve the resolution. The experimental results of a group target show that the proposed approach is correct and effective.