表示出两帧图像间各个像素点的相对情况，搭建OFDM通信系统的框架，是一种双隐层反向传播神经网络，对于初学者具有参考意义，使用高阶累积量对MPSK信号进行调制识别，有较好的参考价值。- Between two images showing the relative circumstances of each pixel, Build a fr a mework OFDM communication system, Is a two hidden layer back propagation neural network, For beginners with a reference value, Using high-order cumulants of MPSK signal modulation recognition, There are good reference value.