用于自适应阵超角分辨的非均匀线阵设计问题

文中讨论了非均匀线阵自适应超角分辨问题,证明了在入射场条件一定的情况下,特征矢量角谱性能完全由阵列因子决定。通过分析与仿真,说明最小冗余阵(LMR) 是一种性能优良的超角分辨阵。并讨论了非均匀线阵存在的栅瓣问题,给出避免栅瓣的单位间距的上限公式。

Problem on the Design of Non-Uniformly Spaced Array Used in Adaptive Super-Angle-Resolution

The structure problems of non-uniformly spaced array used in adaptive super-angle-resolution(SUAR) are discussed in this paper. It is shown that the performances of the angle spectrum of eigenvector algorithms, under some conditions, are determined completely by array factor. Analyses and simulations have illustrated that the linear minimum redundancy(LMR) array is a kind of SUAR array with good performances. It is also shown that some kinds of non- uniformly spaced array, which is the same as uniformly spaced array, have the problem of grating lobes. In this paper, a fomula of the unit length of the array to avoid grating lobes is presented.