双基多输入多输出雷达准平稳目标空间定位算法

Quasi-Stationary Targets 3D Localization for Bistatic MIMO Radar

针对现有双基多输入多输出(MIMO)雷达目标定位算法不适用于准平稳目标的问题,提出了双基多输入多输出雷达准平稳目标空间定位算法。该算法利用目标的准平稳特性和旋转不变特性估计参数(ESPRIT)方法来估计目标相对于发射阵列和接收阵列的二维角度,从而实现对准平稳目标的空间定位。仿真验证表明:该算法不需要多维谱峰搜索和参数配对,具有较小的运算量,并能对消空间阵列噪声,适用于更广泛的未知噪声背景和低信噪比环境。

The existing localization algorithms are not suitable for quasi-stationary targets for bistatic MIMO ra-dar.A novel algorithm was proposed for spatial localization of quasi-stationary targets.By exploiting the charac-ter of quasi-stationary targets and the rotational invariance property of ESPRIT,the two-dimensional direction of departures （2-D DODs）and two-dimensional direction of arrivals （2-D DOAs）of quasi-stationary targets could be estimated accurately,so the targets could be localized in a 3-D plane.The simulation results indicated that the proposed algorithm did not need multi-dimensional nonlinear peak searching,which meant low computa-tional load,and the estimated parameters of the targets could be paired automatically.And the spatial array noise could be eliminated,the proposed algorithm was suitable for more general unknown noise fields and low SNR environments.