二维混合MIMO相控阵雷达收发波束空间设计  

Joint transmit and receive beamspace design for two-dimensional hybrid MIMO phased-array radar

作　　者：刘帅琦 王布宏[1] 李夏[1] 田继伟[1] 曹帅 

机构地区：[1]空军工程大学信息与导航学院 [2]中国人民解放军93801部队

出　　处：《系统工程与电子技术》2017年第10期2221-2227,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(61671465)资助课题

摘　　要：针对如何提高低信噪比条件下二维混合多输入多输出(multiple input multiple output,MIMO)相控阵雷达波达方向估计精度问题,结合收发联合波束空间设计给出了解决方案。首先利用半定规划方法设计发射权值,构造旋转平移不变关系,实现发射方向图能量聚焦,约束旁瓣电平,在干扰方位形成发射零陷;在此基础上,结合最小方差无失真响应算法优化阵列接收权值,提高接收端信干噪比。仿真结果表明,所提方法能够提高低信噪比条件下二维混合MIMO相控阵雷达波达方向估计精度。Aiming at improving the direction of arrival （DOA） estimation accuracy of the two-dimensional hybrid multiple input multiple output （MIMO） phased-array radar in low signal-to-noise ratio（SNR）environment,an effective solution is proposed based on joint transmit and receive beamspace design. First, the transmit weight vector is designed by semidefinite optimization （SDP） to construct rotational invariance property, realize transmit energy focusing, control the side lobe and form nulls in the interference locations. Then the receive weight vector is designed by minimize variance distortionless response （MVDR） to improve the receive signal to noise plus interference ratio （SINR）. Numerical simulations show that our approach can improve DOA estimation accuracy of the two-dimensional hybrid MIMO phased-array radar in low SNR environment.

关 键 词：二维混合多输入多输出相控阵雷达 半定规划 最小方差无失真响应 波达方向估计 

分 类 号：TN820[电子电信—信息与通信工程]