互质阵中空间谱估计研究进展  

Research Progress on Spatial Spectrum Estimation Based on Coprime Array

作　　者：张小飞[1] 林新平 郑旺[1] 翟会 

机构地区：[1]南京航空航天大学电子信息工程学院,南京210016

出　　处：《南京航空航天大学学报》2017年第5期635-644,共10页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(61371169)资助项目

摘　　要：阵列信号处理技术是信号处理领域一个重要分支,广泛应用于雷达、声呐、水电天文等领域。空间谱估计是阵列信号处理中一个主要研究热点,为了避免角度模糊,要求阵元间距要小于等于载波波长的一半。互质阵突破半波长的限制,其阵元间距一般大于半波长。因此,互质阵能够在阵元数固定的情况下,获得更大的阵列孔径。互质阵空间谱估计算法可以利用互质特性辨识目标源,且能够获得更高的测向精度与分辨率。互质阵空间谱估计研究逐渐成为当今阵列信号处理领域的热点。本文总结了互质线阵与互质面阵下的空间谱估计的研究进展,分析了互质阵列相对于普通均匀阵列在阵列孔径扩展以及提高空间自由方面的优势。仿真结果展现了互质阵下高效的波达方向估计性能。Array signal processing technology is an important Spatial spectrum estimation is a major re- is widely used in radar, sonar and hydropower astronomy. search hotspot in array s!gnal processing and is confined to the arrays with inter-element spacing smaller than half wavelength of the carrier wave to avoid ambiguous angles. Generally, the inter-element spac- ing of coprime arrays is larger than half wavelength. As a result, with fixed number of sensors, the coprime arrays can obtain extended array aperture and hence the corresponding spectrum estimation methods can achieve better direction of arrival estimation performance and resolution, where the targets can be detected uniquely with eoprime property. Therefore, the investigations of spatial spectrum esti- mation with coprime arrays have aroused considerable attentions in array signal processing. In this pa- per, we summarize the existing researches based on coprime linear array and coprime planar array and analysis the advantages of the coprime array relative to the uniform array in expanding array aperture and increasing spatial degree of freedom. Simulation results validate the effectiveness and superiority of the methods with coprime arrays.

关 键 词：互质线阵 互质面阵 空间谱估计 波达方向估计 

分 类 号：TN911.7[电子电信—通信与信息系统]