子空间算法是一种基于矩阵特征空间分解的方法，信号子空间由阵列接收到的数据协方差矩阵中与信号对应的特征向量组成噪声子空间则由协方差矩阵中所有最小特征值噪声方差对应的特征向量组成。子空间算法就是利用这两个互补空间之间的正交特性来估计空间信号的方位-Subspace algorithms is minimized by the corresponding eigenvalues ​ ​ of all the noise variance-covariance matrix of a matrix decomposition method based on the feature space , subspace signal is received by the array data covariance matrix composed of the noise subspace and signal corresponding eigenvectors feature vector components. Subspace algorithm is the use of orthogonal properties between these two complementary space to estimate the orientation of the space signal