ARM抗有源诱偏中的DOA估计算法

Anti-Active Decoy DOA Estimation Algorithm for Anti-Radiation Missile

基于对反辐射导弹抗有源诱偏问题中信号特点的分析,提出了一种有针对性的信号波达方向估计算法。利用均匀线阵导向矢量的Vandermonde结构,推导出噪声子空间的代数表达形式,继而利用多项式求根法获得DOA估计。新算法仅对接收数据的一阶统计量进行处理,与经典的Root-MUSIC算法相比,不仅计算复杂度大大降低,而且在间距较近、信号相关/相干辐射源情况下性能优势明显。仿真实验结果验证了所提方法的有效性。

Based on the analysis of the signal in anti-radiation missile（ARM） contradict active decoy,a novel algorithm of signal direction of arrival （DOA） estimation is proposed.An algebraic solution of the zero subspace is derived based on the Vandermonde structure of the uniform linear array＇s steering vectors,and then,the DOA estimation is gotten with a polynomial rooting method.Since only the first order statistics of the array output data is used,compared with the classic Root-MUSIC,the proposed algorithm is not only more computational saved but also more robust in the situation that all the sources are closely spaced and correlated/coherent.At last,the results of simulation prove the validity of the novel algorithm.