基于人工神经网络的常用数字信号调制，利用最小二乘算法实现对三维平面的拟合，最大似然（ML）准则和最大后验概率（MAP）准则。- The commonly used digital signal modulation based on artificial neural network, Least-squares algorithm to fit a three-dimensional plane, Maximum Likelihood (ML) criteria and maximum a p