零陷展宽算法的性能研究

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.通过对于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.由于零陷的加宽,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 the wide nulling algorithm

The adaptive beamforming algorithm can aim at the direction of jammer automatically. But when the antenna platform vibrates or interference moves quickly, it is possible that the mismatch occurs for adaptive weight and data due to the perturbation of the inteference location. Here an adaptive beamforming null widening technology is deduced by utilizing the numerical method to korrelated variance matrix via the rotation of the steering vector. Because the nulling widens, even when the direction of the interference and the data dismatch, the interference can still be suppressed so that the robustness of the algorithm is raised.