The total least squares process weakens the influence of the noise so the estimated noise subspace is close to the true noise subspace and the algorithm puts nulls in the interferences directions.

• 利用总体最小二乘方法得到噪声子空间，总体最小二乘处理减轻了噪声的影响，因而估计的噪声子空间接近真实噪声子空间，干扰方向形成零点。