相控阵雷达无法分辨一个波束宽度内的2个目标,多输入多输出(Multi-Input Multi-Output, MIMO)雷达阵列各阵元 发射正交信号,提高了阵列系统的自由度,改善了雷达阵列系统分辨性能。文中给出了MIMO阵列相关滤波器组分离目 标回波信号的原理框图,并进行了MIMO阵列常规波束形成器和最小方差无失真响应(MVDR)波束形成器理论分析和仿 真实验。仿真结果表明,MIMO阵列比常规相控阵列具有更高的角度分辨率。

Contrast to phased-array radar cannot resolve two targets located in a single beam, multi-input multi-output (MIMO) radar improve target bearing resolution by enabling each element transmit orthogonal signals to increase degrees of freedom (DOF) . In this paper, a correlative filter bank configuration is proposed for the orthogonal components separation of the MIMO array target echoe, and the conventional beamformer (CBF) and minimum variance distortionless response (MVDR) beamformer for the MIMO array target DOA estimation are evaluated and studied theoretically and via simulations. Simulation results show that angular resolution achieved by MIMO array is higher than that of its phased array counterpart.

国防科技重点实验室基金;西北 工业大学基础研究基金