互耦的存在严重影响了DOA估计的精度，文中研究了存在互耦情况下的DOA估计问题，重点讨论了阵列单元互耦效应的有效计算和对MUSIC算法的修正问题；以缝隙阵列天线为例，通过对无限阵散射参量的修正得到有限阵的散射矩阵和阻抗矩阵，进而通过阻抗矩阵估计互耦的影响，并对MUSIC算法进行修正，最后给出了仿真结果。

The presence of mutual coupling affects the precision of DOA estimation. The effect of mutual coupling among array elements on the performance of DOA estimation is investigated. The calculation of mutual coupling of slotted array and the correction of MUSIC algorithm are mainly investigated. The scattering and impedance matrix of finite slotted array are acquired by modification of the scattering parameter of infinite array. The impedance matrix is then used to eliminate the effects of mutual coupling and correct the performance of MUSIC algorithm. Finally, the results of computer simulation are given.

TN957.2

航空科学基金资助项目（No.03F53028）