基于波束赋形的星载自适应调零技术

摘要

针对传统的星载自适应调零系统存在易受干扰影响而大大降低调零效能的问题，提出了一种基于波束赋形的自适应调零方法。星载调零技术以方向信息为调零准则，要求调零系统具有较高测向精度和相干信号处理能力；新方法以波束覆盖区域和相关功率为代价函数，通过自适应迭代处理，在干扰位置处形成零点，从而实现抑制干扰的目的，理论分析和仿真试验均验证了该调零算法的有效性和鲁棒性。%Traditional onboard nulling technology uses direction information to realize jamming position nulling,which requires high precision for DF(Direction Finding)and high ability to deal with concerned signal.So the nulling system is very easy out of work in case of jamming.This article presents an adaptive nulling algorithm based on beamforming. This algorithm uses beam coverage range and concerned power as expense function, and uses adaptive iterative algorithm, gradually forms zero point at jamming position for anti⁃jamming.Theoretical and experimentation results both proved the effectiveness and robustness of this algorithm.