Abstract
To detect a small target on the sea surface, we propose a detection algorithm that operates in three steps: (1) representation of three-dimensional complex cube in the (radial range, pulse time, scan time) domain by using stepped carrier frequency in fast scan mode; (2) intrascan integration to transform complex cube from the pulse time domain to the radial velocity domain by using Fourier transform; and (3) interscan integration to detect a small target by using a conventional optimal coherent detector with a Fourier relationship between stepped carrier frequency and initial radial range, and a discriminator between a true target and false targets. The proposed method improves the ability to detect of a small target, and reduces the sensitivity to sea clutter despite relatively low radial range resolution. In experiments, our proposed method could perform accurate and robust detection of a small target.
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