压缩感知，通过开发信号的稀疏特性，在远小于Nyquist 采样率的条件下，用随机采样获取信号的离散样本，然后通过非线性重建算法完美的重建信号-Compressed sensing, through the development of signal sparse characteristics, in the condition of far less than the Nyquist sampling rate, the use of random sampling to obtain the