ML法能够很好的估计信号的信噪比,matlab实现了五类灰色关联度模型的计算,包含特征值与特征向量的提取、训练样本以及最后的识别。- ML estimation method can be a good signal to noise ratio, matlab implements five gray correlation degree computing model, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition.