A Robust CFAR Detector Based on Ordered Statistic

An improved version of VI-CFAR called OSVI-CFAR is presented. It is a combination of the ordered statistics (OS) CFAR, the smallest-of OS (SOOS) CFAR and the greatest-of OS (GOOS) CFAR. In homogeneous and clutter edge environments, the detection performance and false-alarm regulation properties for the OSVI-CFAR detector are almost consistent with the VI-CFAR based on mean level (called ML VI-CFAR). But in multiple target situations which the interfering targets are present in both the halves of the reference window, the detection performance for the OSVI-CFAR detector is improved greatly, so it is more robust than the MLVI-CFAR in practice. Finally, some important properties of the OSVI-CFAR detector are analyzed and discussed