已调制信号计算其普相关密度，ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块，电力系统暂态稳定程序，可以进行暂态稳定计算。- Modulated signals to calculate its density Pu-related, ofdm system simulation including 16qam modulation fft windowing modules plus cp, Power System Transient Stability Program, ca