有信道编码，调制，信道估计等，数学方法是部分子空间法，基于SVPWM的三电平逆变的matlab仿真，基于人工神经网络的常用数字信号调制，PLS部分最小二乘工具箱,详细画出了时域和频域的相关图，基于chebyshev的水声信号分析。- Channel coding, modulation, channel estimation, Mathematics is part of the subspace, Based on SVPWM three-level inverter matlab simulation, The commonly used digital signal modulation based on artificial neural network, PLS PLS toolbox, Correlation diagram shown in detail the time domain and frequency domain, Based chebyshev underwater acoustic signal analysis.