部分实现了追踪测速迭代松弛算法，现代信号处理中谱估计在matlab中的使用，信号处理中的旋转不变子空间法，是学习PCA特征提取的很好的学习资料，最大似然（ML）准则和最大后验概率（MAP）准则，鲁棒性好，性能优越。-Partially achieved tracking speed iterative relaxation algorithm, Modern signal processing used in the spectral estimation in matlab, Signal Processing ESPRIT method, Is a good learning materials to learn PCA feature extraction, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, Robustness, superior performance.