一种三角形栅格阵列的波达方向估计方法  

A Method for DOA Estimation of Triangular Grid Array

作　　者：张孟达[1] 杨广玉[1] 刘小忠[1] 

机构地区：[1]中国电子科技集团公司第三十八研究所,安徽合肥230088

出　　处：《雷达科学与技术》2015年第1期99-102,共4页Radar Science and Technology

摘　　要：大型阵列因阵元数目多,具有增益高、波束窄的特点而得到广泛应用。针对大型阵列阵元数目较大的特点,在工程应用中通常采用2D-FFT算法快速估计波达方向。但是2D-FFT算法仅适用于天线阵元矩形栅格排布情况。若2D-FFT用于三角形栅格排布的阵列,则会出现栅瓣。针对这一问题,提出一种基于2D-FFT的相位补偿算法用于三角形栅格阵列的波达方向估计。该算法将2D-FFT分为行变换和列变换两步,对行变换的结果相位补偿后再进行列变换。理论分析和计算机仿真证明了该算法的有效性。The large scale array with thousands of array elements has been widely used for its high gain and narrow beam in the desired directions.The large scale array with a number of elements usually adopts the two-dimension fast Fourier transform（2D-FFT）algorithm to estimate the direction of arrival（DOA）.However,the 2D-FFT algorithm is only suitable for the case that the antenna elements arranged in a rectangular grid.If the 2D-FFT algorithm is used for the triangular grid array,the gating lobes will occur.To solve this problem,a new method with phase compensation based on 2D-FFT algorithm for DOA estimation of triangular grid array is proposed.Theoretical analysis and computer simulation confirm the effectiveness of the proposed method.

关 键 词：大型阵列 三角形栅格 相位补偿 波达方向估计 

分 类 号：TN958[电子电信—信号与信息处理]