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.

• 对均匀圆阵列 (U CA)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。