本程序仿真了正交频分复用的调制与发射，其中包括循环前缀，FFT变换，白噪声信道模拟等部分，最后得出不同信噪比先的系统误码率。-This program simulates the orthogonal frequency division multiplexing modulation with the launch, including the cyclic prefix, FFT, white noise channel analog part of the conclusion that a different signal to noise ratio before the BER.