本代码使用高斯绝对稀疏信号进行重构，采用的重构算法是SAMP，重构效果好！-This code uses the absolute sparse Gaussian signal reconstruction, reconstruction algorithm uses a SAMP, good remodeling effect!

matlab OMP程序，先得到稀疏信号，再投影重构-Matlab OMP, first get sparse signal, and then the projection reconstruction