是一种双隐层反向传播神经网络，包括单边带、双边带、载波抑制及四倍频,FIR 底通和带通滤波器和IIR 底通和带通滤波器。- Is a two hidden layer back propagation neural network, Including single sideband, double sideband, suppressed carrier and quadruple, Bottom-pass and band-pass FIR and IIR filter bottom pas