摘要
针对现有宽带相干信源DOA估计算法存在的问题,提出了一种解决宽带相干信源空间谱估计的新方法。简述了宽带阵列信号模型以及投影子空间正交性测试(TOPS)方法,并深入分析了TOPS不能适应相干信号的实质。通过将矩阵共轭重构算法引入TOPS算法中,解决了TOPS算法不能处理相干信号的问题。此方法不仅提高了抗相干信号的能力,而且在聚焦中不需要角度的预估计。数值仿真实验结果验证了该方法的有效性。
Aiming at the disadvantages of existing DOA estimation methods for wideband coherent sources,a new algorithm is proposed for estimating DOA of wideband coherent sources.It is pointed out that TOPS（test of orthogonality of projected subspace）cannot process coherent sources,matrix conjugated reconstruction method is combined with TOPS algorithm here,which solves the problem of TOPS algorithm that cannot process coherent sources.This algorithm is in no need of initial estimation of the DOA,which enhances the robustness of the method.The result of computer simulation shows validity of this algorithm.
出处
《无线电工程》
2010年第10期16-19,共4页
Radio Engineering
