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 simul