中文说明：此代码对于 OFDM 链路级仿真，其中包括 OFDM 调制、 解调、 瑞利衰落信道和 AWGN 信道下给出了一个简短的仿真平台。误码率比较也是包括在内的。
English Description：
This code gives a brief simulation platform for the OFDM link-level simulation, which includes OFDM modulation, demodulation,Rayleigh fading channel and AWGN channel. BER comparison is also included.