The calculation amount of clutter compensation and suppression algorithm in array element domain increases sharply when the number of array elements increases.The spatial-domain reduced-dimensional scheme of simultaneous multiple-beam reception can significantly reduce the complexity of the system,but the non-stationary property of airborne bistatic radar clutter in the beam domain brings great difficulties to clutter suppression,and there is currently no relevant research on the beam domain compensation method.To solve the above problems,this paper proposes a non-stationary clutter suppression method for airborne bistatic radar which is suitable for the beam domain.By constructing a range-dependent space-time interpolation matrix,the echo data of different range gates is interpolated differently,and the beam domain range-dependent compensation is realized.Then,the beam domain space-time adaptive processing(STAP)method is adopted for the compensated data,which achieves effective clutter suppression while reducing complexity.Simulation experiments verify the effectiveness and feasibility of this method.
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