基于实值处理的联合波束域双基地MIMO雷达测角算法

Joint Real-valued Beamspace-based Method for Angle Estimation in Bistatic MIMO Radar

该文提出一种基于实值处理的联合波束域双基地多输入多输出(MIMO)雷达测角方法。与直接采用离散傅里叶变换(DFT)空域滤波器的传统波束域方法不同,该方法的空域滤波器通过凸优化方法进行设计,能够灵活控制空域滤波器的带宽并抑制旁瓣电平。基于这种特性,设计的空域滤波器的主旁瓣比能够得到很大提高,从而提高测角性能。更重要的是,所提算法对发射和接收波束矩阵的结构进行设计,这种特殊的结构是构造实值信号模型的必要条件。最后,该文通过建立映射关系的方法对插值误差进行补偿。仿真结果验证了该算法的有效性。

A joint real-valued beamspace-based method for angle estimation in bistatic Multiple-Input Multiple- Output (MIMO) radar is proposed.Instead of using the traditional Discrete Fourier Transform (DFT) beamspace filter,the proposed beamspace filter is designed through convex optimization,which can flexibly control the bandwidth and limit the sidelobe level.Based on this property,the mainlobe-to-sidelobe ratio of the proposed beamspace filter can be greatly improved,which results in the improved estimation performance. More importantly,the structure of the proposed beamspace matrix can be properly designed,which is indispensable in constructing the real-valued signal model.Finally,the mapping relationship to compensate the interpolation error is established.Simulation results verify the effectiveness of the proposed method.