摘要
在干扰入射方向,自适应天线阵方向图会产生零陷,使副瓣电平降低。根据自适应阵列的这一特性,应用一种基于最大输出信噪比准则的改进自适应算法对天线阵进行方向图综合。假定有大量干扰信号施加到方向图副瓣区,通过只对副瓣峰值电平进行控制调整加权值,降低副瓣电平,得到满足副瓣要求的目标方向图,使算法得到简化。可以应用于不等间距直线阵列和矩形平面阵的方向图综合问题。考虑了阵元间的互耦及阵元方向图特性的影响。仿真结果证实了该算法是可行的。
Adaptive antenna arrays are able to form a pattern null in the direction of an interfering signal, which lowers the sidelobe level in this direction. According to this, an improved adaptive algorithm based on maximum signal-to-noise ratio （MSNR） is applied to pattern synthesis of antenna arrays. Supposing a large num- ber of interfering signals are incident in the sidelobe region, the pattern is modified to satisfy the spid sidelobe level specification by only adjusting the peak sidelobe level, and thus makes the computation simplified. The algorithm can also be applied to pattern synthesis for nonuniform linear arrays and rectangular planar arrays. Mutual coupling and element pattern characteristic are taken into account. The algorithm is validated through simulation.
出处
《电波科学学报》
EI
CSCD
北大核心
2009年第2期249-253,258,共6页
Chinese Journal of Radio Science
