Mutual coupling effect and degree of freedom are two important factors to be considered in the planar sparse array (PSA) design. This paper presents two new planar sparse geometries, referred to as the half H array an...
详细信息
Mutual coupling effect and degree of freedom are two important factors to be considered in the planar sparse array (PSA) design. This paper presents two new planar sparse geometries, referred to as the half H array and ladder array, by introducing the effective difference co-array concept and redistributing the dense array elements of the open box array (OBA) to the outer diagonal straight line. The detection capacities of the new structures can be maintained at the same level as the OBAs. Furthermore, they possess much fewer sensor pairs closely spaced, leading to the mutual coupling between the adjacent sensors significantly reduced. Simulations of the direction-of-arrival estimation verify the superiorities of the proposed PSAs with the 2-D unitary ESPRIT algorithm.
The term fractal refers to the fractional dimensions that have recursive nature and when clubbed with the properties of sparse arrays leads to the generation of a novel array called a sparse fractal array. In this pap...
详细信息
ISBN:
(纸本)9781665452458
The term fractal refers to the fractional dimensions that have recursive nature and when clubbed with the properties of sparse arrays leads to the generation of a novel array called a sparse fractal array. In this paper, we extend our research to the 2D domain by introducing planar sparse arrays which generate hole-free difference coarray and have O(N-2) elements just like the OBA but here in the new closed box form, with the additional property of fractal arrays along with sparseness. To estimate azimuth and elevation angle we have designed planar sparse fractal arrays using nested arrays and coprime arrays as the fundamental basic generating array which helps in achieving a high degree of freedom which makes it useful for DOA estimation. Simulations show that the proposed planar arrays have the better estimation performance when compared with existing planar arrays like URA, OBA, and CPA.
暂无评论