搭建OFDM通信系统的框架，可以得到很精确的幅值、频率、相位估计，包括最小二乘法、SVM、神经网络、1_k近邻法。- Build a fr a mework OFDM communication system, You can get a very accurate amplitude, frequency, phase estimation, Including the least squares method, the SVM, neural networks, 1 _k neighbor