improving fluctuating target detection using high range resolution stepped frequency radars

one of the problems in detecting radar targets is the variation of target cross section due to aspect angle; which is named as target fluctuation. this perfectly depends on target geometry and transmitted wavelength and can cause significant loss of detection. one of the solutions to this is improving the radar range resolution. stepped frequency is one of the signals that can improve the range resolution. in this paper we introduce this radar signal and explain its processing technique. then we investigate improving detection of fluctuating target in this radar. to do this, we first introduce three methods for modeling of range distributed targets. then suggest two detectors for detecting these targets. finally it is shown that distribution of target due to high range resolution can compensate the target fluctuation loss completely.