Extended Space Doppler Processing for Non - Cooperative Ground Moving Target Imaging

Non-cooperative moving target appear defocused in SAR image due to the lack of knowledge of the relative motion between radar platform and moving target. The spreading effect induced by uncompensated target motion leads to a low detection capabilities especially in the case of ground moving target where the target returns is lower compared to the clutter return. Moreover in the case of bistatic geometry the problem of clutter non-stationary should be taken into account since this dramatically reduce the detection performance of the conventional STAP filter technique used in monostatic system. In this paper a new bistatic STAP processing operating in space Doppler domain is introduced. The improvement in detection performance make ISAR processing applicable to obtain a well focused image of non-cooperative moving target through the compensation of the relative motion between SAR platform and each detected target.