说明：  用MATLAB实现的压缩传感，包含位置式PID算法、积分分离式PID，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，研究生时的现代信号处理的作业。
(Using MATLAB compressed sensing, It contains positional PID algorithm, integral separate PID, Is a good learning materials to learn PCA feature extraction, Channel coding, modulation, channel estimation, Modern signal processing jobs when the graduate.)