中文说明：主要是OFDM系统中，基于LS和MMSE的信道估计的matlab仿真，该算法比较详细的介绍了这两中算法的实现过程，比较适合做该方面研究的初学者学习参考，代码经过调试，可以直接运行。
English Description：
This paper mainly introduces the MATLAB simulation of channel estimation based on ls and MMSE in OFDM system. The algorithm introduces the implementation process of these two algorithms in detail, which is more suitable for beginners to study and reference in this field. After debugging, the code can run directly.