对均匀圆阵列(UCA)二维波达方向估计问题，运用相位激励模式波束形成技术，得到圆阵波束空间实值阵列流形。在波束空间内．研究了相干信源子空间分解技术和加权子空间拟合技术。计算机仿真表明，在波束空间内的加权子空间拟合技术具有良好的相干信源二维波达方向估计性能。

For the purpose of estimating 2 D DOA of uniform circular array(UCA), phase mode excitation based UCA beamforming is employed to obtain real valued beamspace manifold. We researched the subspace eigenvalue decomposition and weighted subspace fitting techniques in the beamspace. The computer simulations indicated that the weighted subspace fitting technique in the beamspace possessed a significant advance of 2 D estimation for coherent sources.

TN911 TN957.51