三相光伏逆变并网的仿真，构成不同频率的调制信号，信号处理中的旋转不变子空间法，从先验概率中采样，计算权重，处理信号的时频分析，matlab小波分析程序，基于人工神经网络的常用数字信号调制。- Three-phase photovoltaic inverter and network simulation, Constituting the modulated signals of different frequencies, Signal Processing ESPRIT method, Sampling　a priori probability, calculate the weight, When processing a signal frequency analysis, matlab wavelet analysis program, The commonly used digital signal modulation based on artificial neural network.