基于人工神经网络的常用数字信号调制，包括单边带、双边带、载波抑制及四倍频,利用最小二乘法进行拟合多元非线性方程。- The commonly used digital signal modulation based on artificial neural network, Including single sideband, double sideband, suppressed carrier and quadruple, Multivariate least squares fitting method of nonlinear equations.