中文说明：压缩感知的贪婪算法OMP，包括原代码，测试代码，还有信号恢复成功率与测量数、信号稀疏性的关系图示
English Description：
OMP, the greedy algorithm of compressed sensing, includes the original code, test code, and the diagram of the relationship between the success rate of signal recovery and the number of measurements and signal sparsity