说明：  简明地介绍了压缩感知的理论，并对当前的无线通信系统进行分析，说明了将压缩感知应用于信道估计的可行性，以及如何将此理论应用于信道估计中。
(Concise introduction to the theory of compressed sensing, and current wireless communication systems analysis, describes the channel estimation used in compressed sensing feasibility, and how this theory is applied to channel estimation.)