大角度干扰抖动下的零陷展宽算法研究

自适应波束形成算法能将零陷自动对准干扰方向，但在干扰快速移动或天线平台出现振动等情况下，很可能由于干扰位置的扰动而使自适应权和数据失配．通过对干扰导向矢量的左右旋转，利用对协方差矩阵的数值处理，推导出一种和干扰方向无关的自适应零陷加宽技术．该方法通过对角度偏移量的跟踪，尤其适合较大抖动角度情况下零陷的展宽，在干扰方向与数据失配的情况下，仍能够较好地抑制干扰，从而提高算法的稳健性．

Research on widened nulling under drastic interference angle shaking

The adaptive beam-forming algorithm can aim at the direction of jammer automatically. But when the antenna platform vibrates or interference moves quickly, it is possible that the mismatching occurs between adaptive weight and data due to the perturbation of the interference location. Here an adaptive beam-forming null widening technology is deduced by utilizing the numerical method of correlated variance matrix according to the rotation of the steering vector. By tracing the deviation of angle, this method is well suitable to nulling widening with great shaking angle. The interference can still be suppressed well even in the situation where the interference direction and data dismatch, so that the robustness of the algorithm is improved.