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To improve the robustness of modified scatterer density dependent (MSDD) detector, a scatterers integrator based on the maximum variance of order statistics (SI-MVOS) is proposed. Firstly, the number of scatterers of target is estimated based on the maximum variance of order statistics. Secondly, the energy of estimated scatterers is integrated to form the detection statistic. Its detection performance...
In the paper, the proportions of the sea clutter Intrinsic Mode Functions (ab. IMFs) energy to the whole signal energy and the influence of the target on the proportions are discussed. It is found that the latter low frequency IMFs are weaker when no target is hit, but they are stronger when the target is hit, and the proportions of their energy to the whole signal energy become larger, which could...
Adaptive detection of a sparsely distributed target is addressed without secondary data, in non-Gaussian clutter modelled as a spherically invariant random vector. By utilising different estimators of covariance matrix, an adaptive detection scheme is proposed for a sparsely distributed target, based on the generalised likelihood ratio test and the order statistics. Moreover, the adaptive detector...
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