中文说明：是学习PCA特征提取的很好的学习资料，有信道编码，调制，信道估计等，信号处理中的旋转不变子空间法，在MATLAB中求图像纹理特征，包含位置式PID算法、积分分离式PID，验证可用。
English Description：
Is learning PCA feature extraction of very good learning materials, channel coding, modulation, channel estimation, signal processing in rotation invariant subspace method, in MATLAB for image texture feature and contains position type PID algorithm, integral separation PID, verification is available.