【作者】 李倩茹； 宋志杰； 王良；

【Author】 LI Qian-ru;SONG Zhi-jie;WANG Liang;College of information science and engineering,Ocean University of China;

【机构】 中国海洋大学信息科学与工程学院；

【摘要】 在相同的阵元数下,非均匀稀疏阵能够获得更大的阵列孔径,但测向时会出现方位模糊。针对这一问题,本文探讨一种特殊的局部满足空间采样定理的非均匀稀疏阵(间距为?/2的基元对组成的非均匀稀疏阵,BMNSLA)的最小方差无畸变响应(MVDR)波束形成方法,通过数值仿真分别同常规波束形成(CBF)的方位模糊抑制能力和等阵元数的均匀阵列的方位分辨力进行对比,并进一步研究了等效阵间距对该方法测向性能的影响,结果表明:较CBF方法,MVDR方法具有更好的测向性能,BMNSLA能获得较等阵元数的均匀阵列更好的测向分辨力。更多还原

【Abstract】 With the same number of array elements,non-uniform sparse thinned array can get bigger aperture,which will lead to a problem of azimuth illegibility.In this paper a special non-uniform sparse thinned array whose local spacing meets spatial sampling theorem(binary motif non-uniform sparse linear array,BMNSLA) based on the minimum variance distortion response(MVDR) beamforming method is studied.By numerical simulation this method is compared respectively with conventional beamforming(CBF) in ambiguity suppression and uniform array with the same elements in resolvability,and further the influence of the equivalent spacing is analyzed.The results indicate:MVDR can yield better performance on direction finding compared with CBF;BMNSLA ensures a better resolution than uniform array with the same number of elements.更多还原