INTERRELATED PROBLEMS IN SPACE-TIME PROCESSING FOR SAR AND ISAR

Two applications of space-time adaptive processing are addressed: clut ter rejection for ISAR by a moving radar, jammer cancellation for broa dband radar like SAR. It is shown that for both problems the space-tim e covariance matrix has a similar form. The effect of space-time FIR f iltering on the resolution capability of ISAR and SAR is analysed. It appears that distortions of the point spreading function mainly appear close to the clutter (or jammer) notches of the adaptive filter, i.e. in areas where the filter transfer function is constant with Doppler (angle).