中文说明： OFDM正交频分复用的调制和解调在通信领域研究比较广泛，但OFDM存在一定的调制误差，可以通过调整抽样判决算法，优化恢复相位的偏差。此代码中，通过添加抽样代码，判决算法，完成OFDM解调的相位补偿SFO。
English Description：
OFDM modulation and demodulation for orthogonal frequency division multiplexing communication field is widely used, but certain modulation error of OFDM, you can adjust the sampling algorithm to optimize recovery phase deviation. In this code, by adding the sample code, algorithm, complete OFDM demodulation phase compensation of the SFO.