Cognitive space-time adaptive (STAP) radar system optimizes the receiving filter according to the time-varyingclutter environment. Aiming at the optimization design of receiving filter, an optimization model of STAP radar filter isestablished, and a method of filter optimization based on Lagrange dual algorithm is proposed. Compared with thetraditional adaptive STAP filter, the simulation results show that the performance of cognitive reception STAP filter isanalyzed and verified. Compared with the traditional adaptive STAP filter, cognitive STAP filter can significantlysuppress clutter and effectively improve the signal-to-noise ratio.
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