Estimating the Length of a Radar Shadow in Shadow-feature-enhanced Detection Using a Fuzzy System
نویسندگان
چکیده
Radar shadows are observed when an object that lies within the main beam of a radar transmitter screens a region of the detection space. Objects lying within the screened region, or shadow , reflect no energy back to the radar receiver. When a target screens a region of clutter, such as shown in Fig. 1, the probability of detecting the target may be increased by resolving the lower power returns of the radar shadow from the surrounding higher power clutter returns. Theory and applications of this general concept to enhancing radar detection performance have been discussed in a number of papers [1], [2], [3], [4], [5]: Orlando and Haykin have implemented a system for automatic detection of icebergs from their radar shadows using the Hough transform [1]; more recently, Lombardo et al. have devised a method for target detection in synthetic aperture radar images using shadow information [2]; Khomenko and Zatserklyany have presented a basic concept for detection of ships from their radar shadows [3]; Leung and Minett have developed a method for enhancing the detection performance of the Maximum-Likelihood Constant False Alarm
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