中文说明：
现在我终于找到了一份，它以FUNCTION的形式，再现了OFDM映射，IDFT/DFT，同步（时间/频率同步）和信道估计，以及频率偏移的估计等一系列代码。希望大家能从中得到你需要的东西。
English Description：
Now I finally found one, which reproduces a series of codes in the form of function, such as OFDM mapping, IDFT / DFT, synchronization (time / frequency synchronization) and channel estimation, as well as frequency offset estimation. I hope you can get what you need from it