基于遗传算法的唯相位控制方向图零点生成

Null Steering Using Genetic Algorithms by Controlling Only the Current Phases

提出了一种基于排序的二进制编码遗传算法 ,并将该算法应用于唯相位控制方向图零点生成。由于在遗传算法中采用基于排序的选择方法和避同交叉方式 ,因而较好地克服了早熟现象。计算实例说明提出的算法十分有效 ,获得了比已有文献更低的零深 ,并且可以在主瓣附近或旁瓣区生成零点 ,也可以在对称主瓣两侧方向生成零点。

A binary coded genetic algorithm based on sorting is presented and applied to null steering of linear arrays by controlling only the current phases. The premature phenomenon is overcome effectively because the selection scheme based on ranking and the crossover method of avoiding the same chromosomes are utilized. Numerical results show the effectiveness of the proposed technique, the null depth levels obtained are lower than those reported in the literatures. Nulls are imposed both at the specified directions in the sidelobe region or in the neighbourhood of the main beam and at symmetric location with respect to the main beam.