基于二次编码的MIMO雷达阵列稀布与天线综合

研究MIMO雷达在阵元数有限、阵列孔径有限、水平维和垂直维分别存在最小阵元间距等约束条件下的天线方向图综合问题。MIMO雷达采用稀布天线,为了降低旁瓣电平,天线综合过程中同时考虑发射方向图和接收方向图的影响,将阵元间距的稀疏约束从规则栅格扩展为仅有两维坐标的约束,提出采用二次编码的改进遗传算法,有效地解决了MIMO雷达天线方向图综合中低旁瓣电平设计问题。结合某工程要求给出了某MIMO雷达天线阵优化结果。仿真结果证实了方法的有效性。

Pattern synthesis of antenna array in MIMO radar by using two-layer coding

For the constraints of the number of element,the limited array aperture and the minimum element spacing in both horizontal and vertical dimensions,the optimization of array pattern synthesis in MIMO radar is presented.To lower the sidelobe level,both the transmitting and receiving patterns are considered in the MIMO radar where sparse arrays are used.Extending the sparse constraints of regular grid to the constraints of inter-element distances in a plane,an improved multiple genetic algorithm by coding twice is proposed,with which the problem of pattern synthesis in MIMO radar with lower maximum relative sidelobe level is solved effectively.The optimal algorithm used in practical design is presented.The simulated results confirm the validity of this method.