Abstract:

Missile-borne SAR moves along curve locus.Its imaging algorithm is different from normal air-borne SAR.On the basis of the inherent coupling property between time delay and frequency shift of the pulse compression signal,this paper deduces the output form of shift-frequency jamming on missile-borne SAR based on the missile-borne squint SAR algorithm.The results show that orientation-dimensional displacement and the amount of frequency shift do not have a linear relationship,but to a lesser extent they approximate a linear relationship.Orientation-dimensional and range-dimensional shift-frequency can form two dimensional shift-frequency jamming when working at the same time,thus forming a flexible jamming pattern.Simulation verifies the correctness of the conclusions.

Key words: shift-frequency jamming;missile-borne SAR;curve locus;two dimensional shift-frequency;squint SAR algorithm