提出了一种将对角关联矩阵方法应用于广义最小方差(GMV)系统以获取性能指标的方法.该方法只需扰动模型和时滞矩阵等少量的先验知识就能得到准确的评价方差,避免了辨识关联矩阵时产生的系统误差.仿真结果证明了该方法的有效性. A method is proposed to apply the method of diagonal incidence matrix to generalized minimum variance (GMV) system to get the performance index. This method can obtain accurate evaluation variance only by a small amount of prior knowledge such as perturbation model and delay matrix, Which avoids the system error when identifying the correlation matrix.The simulation results prove the effectiveness of the method.