基于MIMO雷达降维酉求根MUSIC算法角度估计  

Angle Estimation of Music Algorithm for Dimension Reduction and Unitary Rooting Based on MIMO Radar

作　　者：尹大雨 章飞[1] 姬传堂 YIN Dayu;ZHANG Fei;JI Chuantang(School of Electronic Information,Jiangsu University of Science and Technology,Zhenjiang 212100)

机构地区：[1]江苏科技大学电子信息学院,镇江212100

出　　处：《计算机与数字工程》2023年第7期1457-1461,1634,共6页Computer & Digital Engineering

基　　金：国家自然科学基金项目(编号:61801170,61801435)资助。

摘　　要：针对均匀线阵的单基地多输入多输出(MIMO)雷达波达方向(DOA)问题,提出一种基于波束空间降维酉变换的实值求根MUSIC算法。该算法在传统MUSIC算法的基础上通过降维变换与波束空间方法对接收数据进行降维处理,接着酉变换构建实值协方差矩阵,然后进行实值特征值分解得到噪声子空间。通过构建多项式,用多项式求根的方法来代替传统MUSIC算法中的谱峰搜索,多项式所得的根即是目标的DOA估计。该方法不需要进行谱峰搜索,计算量大大减少,仿真结果验证了算法的有效性。To solve the Direction of Array(DOA)problem of single-base multi-input multi-output(MIMO)radar in uniform linear array,a real value MUSIC algorithm based on unitary transformation of dimensionality reduction in beam space is proposed.Based on the traditional MUSIC algorithm,the received data are processed by dimensionality reduction transformation and beam space method,and then the real value covariance matrix is constructed by unitary transformation,and then the noise subspace is ob-tained by real value eigenvalue decomposition.By constructing polynomial,the method of finding the root of polynomial is used to re-place the spectral peak search in the traditional MUSIC algorithm.The root obtained by polynomial is the DOA estimate of the target.The proposed method does not need to search the spectral peak,and the computation is greatly reduced.The simulation results veri-fy the effectiveness of the proposed method.

关 键 词：MIMO雷达 酉变换 降维变换 波束空间 求根MUSIC算法 

分 类 号：TN953.5[电子电信—信号与信息处理]