The present invention relates to an adaptive constant false alarm rate (CFAR) processing method which can suppress an increase in false alarm rate in a boundary area of a clutter which is a reflective image unnecessarily occurring on a radar screen caused by a ground surface, the ocean, rain, an obstacle, an interference electromagnetic wave, etc. and in a multi-target environment; improve target detection performance; and effectively control a false alarm when detecting a small target in a oceanic clutter environment.
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