一种基于互素阵的孔径扩展方法

发布时间：2018-03-05 15:43

  本文选题：互素阵　切入点：孔径扩展　出处：《舰船科学技术》2016年23期 　论文类型：期刊论文

【摘要】：物理阵元数一定的情况下,通过孔径扩展虚拟出大孔径的方法可以提高目标方向估计的分辨率。本文提出使用基于互素阵的孔径扩展方法,该方法基于互素定理,通过满足一定规则的非均匀布阵,使用两物理存在阵元接收到的信号虚拟出一新的阵元,如此将此非均匀阵列扩展为孔径较大的均匀线阵,然后进行目标波达方向估计。仿真和水池试验表明该孔径扩展方法可以显著地提高空间分辨率,以及能够得到更低的旁瓣级,显然能节省物理阵元,对工程应用来说能降低成本,所以具有良好的应用前景。
[Abstract]:The resolution of target direction estimation can be improved by using the method of virtual large aperture of physical array when the number of elements is fixed. In this paper, a method of aperture expansion based on cross-prime matrix is proposed, which is based on the reciprocal prime theorem. By using the non-uniform array with certain rules, a new array element is created by using the signals received by the two physical existential elements, so that the non-uniform array is extended to a uniform linear array with large aperture. Then the DOA estimation of the target is carried out. Simulation and tank experiments show that the proposed method can significantly improve the spatial resolution and obtain lower sidelobe levels, which obviously saves physical array elements. It can reduce the cost of engineering application, so it has a good application prospect.
【作者单位】： 西北工业大学航海学院;
【分类号】：TN911.7
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本文编号：1570870