说明：  OFDM简单仿真，通过仿真实验验证 OFDM 技术的优势，加深对该技 术的掌握，从而深刻理解 4G、5G 相对于前几代移动他通信系统性能 提升的技术优势。
(OFDM simple simulation, through simulation experiments to verify the advantages of OFDM technology, deepen the technology Master the technology, so as to deeply understand the performance of 4G and 5g compared with previous generations of other mobile communication systems Improved technical advantages.)