非均匀线阵MIMO雷达的多目标定位方法

提出一种非均匀线阵多输入多输出（multiple input multiple output， MIMO）雷达的多目标定位方法。该方法基于阵列内插技术，构造一个内插矩阵对非均匀线阵MIMO雷达进行处理，满足虚拟均匀线阵MIMO雷达的特性，推导出虚拟均匀线阵MIMO雷达的信号子空间，最后利用旋转不变信号参数估计技术（estimating signal parameter via rotational invariance techniques， ESPRIT）对目标方位角度进行估计。其优点是突破ESPRIT算法对阵元配置的要求，且有效增加了阵元数目(实为虚拟阵元)，提高了方位角分辨率。仿真结果表明，该算法增加了MIMO雷达探测目标数，角度估计精度接近克拉美罗界根。同时，所估计的二维方位角参数自动配对，不需要额外的配对运算，计算量小。

Multi-target localization for non-uniform linear array of MIMO radar

A multi-target localization method for non-uniform linear array of multiple input multiple output(MIMO) radar is presented.For this approach,the received data of the non-uniform linear array of MIMO radar can be dealt with array interpolation technique,which satisfies the characteristics of a virtual uniform linear array of MIMO radar.Then the signal subspace of the virtual uniform linear array of MIMO radar is obtained and the target’s azimuth angle can be estimated by estimating signal parameter via rotational invariance techniques(ESPRIT).The strongpoint is that the ESPRIT can be extended to other array geometries and the virtual sensors are increased by the proposed method.The simulation results show that more targets can be estimated and the performance of angle estimation is close to the root of Cramer-Rao bound by the proposed method.Furthermore,the estimated parameters are automatically paired without additional paring computation.