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本文提出了一种用于相干源二维波达方向（DOA）估计的新方法。在该方法中，通过构造一种特别形式的阵列数据协方差矩阵，并利用一次最小平方过程从中提取一个线性算子用以估计噪声子空间，使算法不受信号源相关性的影响，且避免了矩阵的特征值分解。基于噪声的相关性是空间带限的合理假设，新方法选用了一种简单而又特殊的平面阵列结构，用以估计信号源入射的方位角和仰角，使算法不需要特定的传感器加性噪声模型。由于该新方法具有上述优点，因而使其更面向于实时应用。
In this paper, a new method of DOA estimation for coherent sources is proposed. In this method, a special form of array data covariance matrix is constructed, and a linear least square procedure is used to extract a linear operator to estimate the noise subspace so that the algorithm is not affected by signal source dependency and avoid Eigenvalue decomposition of the matrix. The noise-based correlation is a reasonable assumption of the spatial band limit. The new method uses a simple and special planar array structure to estimate the azimuth and elevation of the signal source, so that the algorithm does not need specific sensor additive noise model. Because of the above advantages, the new method makes it more practical for real-time applications.