Abstract:

he sinusoidal microDoppler (mD) effect caused by rotating parts of the radar target may contaminate the inverse synthetic aperture radar (ISAR) imaging. Based on the pointscattering model, the geometrical model and signal model for the rotational micromotion are built, and the output image is derived. The results indicate that the ISAR image of a target with rotating parts in various motion parameters can be in the form of a line, a line of points, line strips or a set of points with the amplitude affected by the Bessel function. Moreover, the formative conditions of these different image forms are obtained. The analyses are verified by numerical simulation and measured data. The research is useful in ISAR crossrange modulation jamming.