基于修正超波束技术的精确定向算法探讨

Research on the algorithms of accurate bearing estimation based on modified hyper-beam technique

为提高目标定向精度,在保持基阵孔径不变的前提下,对传统超波束技术进行了修正,将超波束非线性运算和后置处理算法相结合,避开了超波束非线性带来的弊端。仿真结果表明,修正后的方法有效地减小了主瓣宽度,降低了旁瓣高度,提高了系统的目标检测性能,降低了虚警概率,对于系统的精确定向具有重要意义。

Accurate bearing estimation is critical in array processing techniques. Since the conventional hyper beam technique, due to the nonlinearity, cannot be combined straightforwardly with linear post-processing algorithms, this article improves the technique and proposes a new approach which successfully steers clear of the non-linear drawbacks. Simulations demonstrate that this new approach can effectively reduce the width of the main lobe of the beam pattern and reduce the amplitude of the side lobe, and thus enhance the accuracy of the bearing estimation.