摘要
首先提出一种基于波达方向(direction of arrival,DOA)矩阵思想的L型阵列多输入多输出(multi-ple input multiple output,MIMO)雷达二维角度估计方法。通过将L型阵列MIMO雷达所产生的二维虚拟平面阵列划分为两个子阵,并构造估计矩阵以实现二维角度估计。在此基础上,针对角度兼并问题,进一步提出联合对角化DOA矩阵方法。该方法通过构造4个子阵,并采用联合对角化方法估计目标二维角度。该方法在保持原DOA矩阵法无需二维谱峰搜索和参数配对等优点的基础上避免了角度兼并问题,能够减少阵列孔径损失,有效提高阵元利用率和角度估计精度。仿真实验验证了所提方法的有效性。
Firstly, a two-dimensional （2-D） angle estimation method for multiple input multiple output （MIMO） radar with L-shape arrays based on direction of arrival （DOA） matrix is proposed. This method divides the 2-D virtual plane array which is generated by the MIMO radar into two overlapping subarrays, and constructs an estimation matrix to estimate the 2-D angles. To solve the problem of angle annexation, a joint diagonalization DOA matrix method is proposed later. This method generates four subarrays from the 2-D virtual plane array, and uses the joint diagonalization algorithm to estimate the 2-D angles. The proposed method secures the advantages of the existing DOA matrix method such as no requirement of 2-D angle search and autopairing of parameters, avoids the angle annexation problem, reduces the loss of the array aperture, and improves the performance of the angle estimation effectively. The computer simulation results demonstrate the effectiveness of the proposed method.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2011年第11期2398-2403,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(60902079)
国防科技重点实验室基金(9140C0104081005)资助课题
关键词
L型阵列
多输入多输出雷达
波达方向矩阵
联合对角化
二维角度估计
L-shape array
multiple-input multiple-output （MIMO） radar
direction of arrival （DOA） matrix
joint diagonalization
two-dimensional （2-D） angle estimation
