说明：  一个较完整的OFDM通信系统仿真程序，包括编码、调制、IFFT、信道、FFT、解调解码等各个模块，并可以进行OFDM系统性能仿真分析。
(A more complete OFDM communication system simulation, including coding, modulation, IFFT, channel, FFT, demodulation and decoding module, and can OFDM system performance simulation analysis.)