基于四阶累积量的多参数联合估计算法

New method for joint estimation of array parameters based on forth-order cumulants

研究了利用四阶累积量方法估计信号的到达角、极化角和频率.在高斯色噪声情况下四阶累积量参数估计方法可以获得较高的估计精度,但现有的估计方法只利用了四阶累积量矩阵特征分解的特征值,需要多次特征分解和配对运算,计算量很大.提出利用一次特征分解的特征值和特征矢量,这种方法减少了所需的四阶累积量矩阵,且信号参数自动配对,降低了计算量.

The problem of joint estimation of the frequency, angle of arrival and polarization with crossed dipoles is investigated. The proposed method overcomes the disadvantage of most existing methods in which only the eigenvector of the forth-order cumulant matrix is used, thereby greatly reducing the computation burden. Finally, simulation results verify the efficacy of this method.