基于主瓣保形的低旁瓣MIMO雷达发射方向图优化设计方法

当发射天线的个数和结构固定且发射方向图所需要的3 dB主瓣宽度较宽时,绝大多数的发射方向图优化设计方法综合得到的发射方向图都会产生主瓣分裂的现象.针对于此,本文提出一种基于主瓣保形的低旁瓣MIMO雷达发射方向图设计方法.该方法通过约束主波束区域内任意两点之间的线段总是在主波束区域的内部来有效地避免主瓣分裂现象,以及利用...

Low Sidelobe Transmit Beampattern Optimization Design Method for MIMO Radar with Mainlobe Shape-Preserving

When the number and structure of transmitting antennas are fixed and transmit beampattern requires a wider 3 dB mainlobe width,the mainlobe of transmit beampattern will be split in most of the transmit beampattern optimization design methods.Aim at this,a low sidelobe transmit beampattern optimization design method for MIMO radar with mainlobe shape-preserving is proposed in the paper.The proposed method can effectively avoid the phenomenon of mainlobe splitting by guaranteeing that the line segment between any two points in mainlobe region is always inside the mainlobe region of transmit beampattern,and obtain the low sidelobe level by using a modified matrix whose diagonal elements are 0 to modify the non-diagonal elements of transmit waveform covariance matrix.The transmit waveform covariance matrix and the modified matrix can be simultaneously optimized by constructing optimization model.Simulation results show that the transmit beampattern synthesized by the proposed method not only has the desired mainlobe shape,but also has lower sidelobe level.