基于虚拟阵列的 ESP RIT 相干信号 DOA 估计

摘要

提出一种基于虚拟阵列的相干信源 DOA估计方法。利用接收数据及其共轭信息，重新构造子阵数据矩阵，在不损失有效工作阵元情况下采用运算量小的修正 C-ESPRIT方法实现非圆信号在任意初始相位下的相干信号估计。仿真结果表明，VC-ESPRIT算法有效地消除信号初始相位对相干信号C-ESPRIT算法的影响，并且在低信噪比下性能明显优于前后向空间平滑 ESPRIT。%A method of DOA estimation based on virtual array is presented in the presence of coherent signals .U-sing the received dates and its conjugate information , we reconstructed array data matrix .Using the modified C-ES-PRIT, which has small amount of calculation , we estimated the non-circular coherent signal of arbitrary phase with-out array aperture reduction and effective element loss .The simulation results and their analysis show preliminarily that VC-ESPRIT eliminates the limitation of coherent source DOA estimation for C-ESPRIT algorithm and that its performance is better than forward-backward spatial smoothing ESPRIT .