舰载圆形阵列天线抑制相干干扰的性能研究

自适应天线阵常常工作于存在相干干扰的背景下,运用空间平滑技术的波束形成方法可抑制相干干扰,但降低了阵列孔径利用率且不能直接用于圆形阵列.这里对一种基于预正交处理思想的波束形成方法的性能进行了分析,表明其不仅能有效抑制相干干扰,而且充分利用了阵列孔径,在实际应用时可采用阵列移位方式来实现.计算机仿真实验表明,该方法不仅可以在有很大随机移位误差的情况下有效工作,而且在阵元存在幅相误差时比常规方法更有效,所得结论有利于推动该技术走向工程实际.

Study of the performance of suppressing the coherent interference based on shipborne uniform circular array

An adaptive antenna usually works in an environment where coherent interferences exist. The approach of spatial smoothing is often applied to suppress coherence interference, but it has a lower utilization ratio of arrays' aperture and cannot be simply used in uniform circular array. An analysis was done on the performance of an orthogonal processing algorithm and showed that this approach can suppress the coherence interference and has higher utilization ratio of arrays' aperture. It can be achieved by moving the position of the circular array in practice. The method is effective in dealing with displacement error and it can work more effectively than the conventional arithmetic in dealing with amplitude perturbation and phase perturbation as verified by computer simulation.