稀布阵下宽带多波束组合印证测向算法

Algorithm for Taking Direction Finding of Wideband Signals with Multiple Beam Combination of Confirmation under Thinned Arrays

在稀布阵下,对信号强度不同的多个信号进行多波束测向时,由于波束主瓣较宽,副瓣较高,因而无法分辨信号到达方向。针对此问题,提出了一种新的多波束测向算法,即多波束组合印证测向算法。该方法充分利用高副瓣的特点,建立多波束学习训练匹配表,通过查表综合判定信号到达方向。仿真实验结果表明:该算法很好地解决了稀布阵下对同时到达阵元的多个信号测向问题,且算法简单,运算量小,测向精度较好,具有很好的工程应用价值。

When taking direction finding of multiple signals under the thinned arrays for different signal strength,the directions of arrival can’t be distinguished,because of the wider main lobe and the higher side lobe. A new algorithm that is called the algorithm for taking direction finding of wideband signals with multiple-beam combination of confirmation is put forward to deal with taking direction finding of multiple-beam. Firstly,the table of multiple-beam training to match is established by use of the higher side bole. Then,the direction of arrival with the table is estimated. The simulation shows that this method solve the problem of taking direction of multiple signals under the thinned arrays well,it is easy,the amount of computation is small,the accuracy is good,and it has good value in engineering.