针对基于相关函数的波达方向(direction of arrival,DOA)估计方法在冲击噪声环境下性能下降明显甚至失效的问题,提出基于相关熵(Correntropy)的二维ESPRIT算法;该方法利用相关熵在冲击噪声环境下具有鲁棒性的优点,将受干扰信号的自相关函数替换为相关熵函数,并结合二维ESPRIT算法实现在冲击噪声环境下进行二维DOA估计;仿真表明,与基于分数低阶统计(Fractional Lower Order Statistics,FLOS)算法相比,该算法呈现明显优势,特别在高的冲击噪声条件下(1<α<1.5)能对信源方向进行更加有效的估计,且均方误差值仍保持很低。
In order to solve the problem that the correlation function-based DOA (Direction of Arrival,DOA)estimation method has an obvious performance degradation or even a total efficiency loss in the impulsive noise environment,a new two-dimensional ESPRIT algorithm based on correntropy was proposed.It takes advantage of correntropy’s robustness in the impulsive noise environment,replaces the signal's autocorrelation function with the correntropy function and combines with two-dimensional ESPRIT algorithm to estimate two-dimensional DOA in the impulsive noise environment.Simulation results show that CRCO-ESPRIT outperforms the existing FLOS algorithm and espe-cially can estimate DOA efficiently in high impulsive noise environments (1<α<1. 5),and the mean square error still remain at a low level.