中文说明：采用matlab仿真OFDM，直接观察即可，无输入！将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开，这样可以减少子信道之间的相互干扰 ICI 。每个子信道上的信号带宽小于信道的相关带宽，因此每个子信道上的可以看成平坦性衰落，从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分，信道均衡变得相对容易。
English Description：
Matlab simulation of OFDM, direct observation, no input! The channel is divided into several orthogonal subchannels, and the high-speed data signal is converted into parallel low-speed data stream, which is modulated and transmitted on each subchannel. Orthogonal signals can be separated by using correlation technology at the receiving end, which can reduce the interference ICI between subchannels. The signal bandwidth of each subchannel is less than the correlation bandwidth of the channel, so the signal bandwidth of each subchannel can be seen as flat fading, so the inter symbol interference can be eliminated. And because the bandwidth of each subchannel is only a small part of the original channel bandwidth, channel equalization becomes relatively easy.