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CFAR preprocess for near-high clutter detection

The sliding window process in Constant False Alarm Rate (CFAR) detection creates high threshold levels at both up- range and down-range next to a strong clutter point. If the clutter point is stable, these high threshold levels reduce the probability of detection (Pd) unnecessarily. In this paper, a CFAR pre-process is described which removes the high threshold levels near strong clutter and restores the desired Pd.