摘要
提出了一种用于星载赋形天线抗多个相干干扰的基于频域单快拍的测向算法,该方法首先采用频域多目标测向算法实现多干扰源的方向估计;基于估计出的干扰源到达方向,对相干信号采用陷零投影矩阵对强目标陷零,以达到对强干扰进行抑制从而测出弱干扰,较好地保证了相干强弱信号测向的准确性,从而有效地对同时强弱相干干扰进行抑制。仿真结果和性能分析验证了该方法的可行性。
In his paper we propose a novel multi-jamming direction finding method of space-borne antenna. Firstly,we present single-snapshot DOA estimation algorithm in frequency to estimate the DOA of multiple targets,and then use the nulling projection matrix to make the stronger signal not so strong in order that we can estimate the weaker signal according to the prior accurately estimated DOA. The presented algorithm solves the problems of DoA estimation exactly. Simulation results and performance analysis demonstrate that the algorithm is effective and feasible.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2010年第3期830-837,共8页
Journal of Astronautics
基金
国家自然科学基金(60502045)
关键词
频域多目标测向
相干信源
陷零矩阵
Multiple targets directions finding algorithm in frequency
Coherent signal
Nulling matrix
