研究生时的现代信号处理的作业，包括 MUSIC算法，ESPRIT算法 ROOT-MUSIC算法，是学习PCA特征提取的很好的学习资料，外文资料里面的源代码，是一种双隐层反向传播神经网络。-Modern signal processing jobs when the graduate, Including the MUSIC algorithm, ESPRIT algorithm ROOT-MUSIC algorithm, Is a good learning materials to learn PCA feature extraction, Foreign materials inside the source code, Is a two hidden layer back propagation neural network.