Study On Imaging Algorithm For Anti-ship Missile Seeker

Imaging seeker is one important technique of accurate controlling and guiding. Whether traditional imaging algorithms are the same with missile radar seeker, whether these algorithms can help to achieve accurate controlling and guiding in order to improve hitting precision, these issues are the hotspot about imaging radar seeker research. This dissertation studies on imaging algorithm of radar seeker for anti-ship missile guidance by the numbers.Firstly this report presents that spotlight SAR mode can be translated to rotating platform imaging after motion compensation when little rotational angle, and simulates ship image from this point of view. Then this dissertation uses basal R-D algorithm to image, and corrects the range walk, improves autofocus based on minimum entropy criteria, corrects geometrical shape change to improve imaging effect.Secondly this dissertation uses modified frequency scaling algorithm (FSA) to image on anti-ship missile radar seeker guidance. This algorithm adopts a nonlinear scaling operation to cope with the range-dependent secondary range compression (SRC) which caused by large squint angle. The well-focused images can be acquired.Finally this report analyses ballistic programming and terminal guiding. It can get good image to adopt modified FSA when radar seeker is on terminal maneuver trajectory of SAR imaging.