基于MIMO技术的二维波达方向估计  

2-D Estimation of Direction-of-arrival Based on MIMO Techniques

作　　者：许红波[1] 王怀军[1] 陆珉[1] 粟毅[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《信号处理》2010年第1期60-64,共5页Journal of Signal Processing

基　　金：国防预研基金(编号A2820061305)

摘　　要：传统的L型阵相比面阵精简了阵列结构,以较少的阵元实现二维波达方向估计,但是波达方向估计性能受到物理孔径限制。本文将MIMO技术和L型阵结合,提出一种基于MIMO技术的L型阵二维波达方向估计方法。该方法通过MIM0等效虚拟阵列原理,将L型阵等效为一矩形平面阵列,然后在等效矩形阵列的基础上,采用MUSIC进行二维波达方向估计,以L型阵的物理孔径实现矩形平面阵列的估计性能。本文推导了二维波达方向估计的CRB,计算机仿真实验证实了所提方法的有效性。A traditional L-shaped array carries out direction-of-arrival estimation with reduced sensors compared with a planar array, but the performance is restricted by fact aperture. This paper combines a traditional L-shaped array and MIMO techniques, and a new 2-D direction-of-arrival estimation method is proposed. By virtual arrays of MIMO, the L-shaped array is equivalent to a rectangle planar array through filters, and direction-of-arrival estimation is carried out using MUSIC based on this equivalent planar array. The performance of a rectangle planar array is obtained from the L-shaped array. The Cramer Rao bound （CRB） of 2-D DOA estimation is analyzed theoretically, and simulations show that the proposed method is effective.

关 键 词：阵列信号处理 MIMO雷达 二维波达方向 

分 类 号：TN957.52[电子电信—信号与信息处理]