STAP技术在有源干扰环境下的运用方法

A Method of STAP Application in Active Jamming Environment

为了在复杂的有源干扰环境下改善空时二维自适应处理(Space-time Adaptive Process-ing,STAP)技术的处理性能,提出了一种基于局部空域自适应阵列处理的改进型自适应波束形成方法。这是一种空间抗干扰与STAP技术滤除杂波级联的方法。采用MUSIC技术对有源干扰的波达方向进行估计,然后分别在期望方向和干扰方向形成接收多波束,再在波束域进行自适应处理以抑制有源干扰,最后在空间反干扰滤波后运用STAP技术进行杂波抑制。仿真结果表明,该方法能有效估计出干扰源的方位,使STAP技术在有干扰的环境下也能保持较好的杂波抑制性能,同时在波束域进行自适应滤波,大大降低了抑制干扰所需的运算量,理论分析和仿真结果表明了该算法的有效性。

To solve the problem that how to improve the performance of STAP in the environment of complex active jamming, an improved adaptive beams formed method based on the part space adaptive array processing is put for- ward . The method is presented, which is a method of special anti -jamming technique in series with filtering clut- ter using STAP technique. At first, MUSIC method is used to estimate DOA of the active jamming, then, multi - beams are formed on the anticipant and interfered directions. Finally STAP technique is used to suppress clutter af- ter anti - interference filtering in the space. The result of simulation demonstrates that the use of this method can ef- fectively estimates active jamming~ orientation, and maintains the performance of clutter suppression in the environ- ment of interference. Using adaptive filter in the beam domain can reduce the required computations. The efficiency of the method is demonstrated by simulation.