BP神经网络用于函数拟合与模式识别，GSM中GMSK调制信号的产生，包括最小二乘法、SVM、神经网络、1_k近邻法。- BP neural network function fitting and pattern recognition, GSM is GMSK modulation signal generation, Including the least squares method, the SVM, neural networks, 1 _k neighbor method.