解耦，恢复原信号，ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块，包括面积、周长、矩形度、伸长度。- Decoupling, restore the original signal, ofdm system simulation including 16qam modulation fft windowing modules plus cp, Including the area, perimeter, rectangular, elongation.