中文说明：
针对稀疏圆阵的波达方向估计问题，提出了解相干求根MUSIC算法（Sparse UCA Decorrelation Root-MUSIC，SDR）。通过改进传统的波束变换方法，进行相位校正，并在波束域进行误差补偿，得到具有共轭对称结构的波束域导向矢量。在波束域进行前后向平均处理和使用求根MUSIC算法。
English Description：
To solve the problem of DOA estimation for sparse circular array, a sparse UCA decorrelation root music (SDR) algorithm is proposed. By improving the traditional beam transformation method, phase correction and error compensation are carried out in the beam space to obtain the beam space guidance vector with conjugate symmetry structure. Forward and backward average processing and root MUSIC algorithm are used in the beam space.