ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块，合成孔径雷达（SAR)目标成像仿真，脉冲响应的相关分析算法并检验。- ofdm system simulation including 16qam modulation fft windowing modules plus cp, Synthetic Aperture Radar (SAR) imaging simulation target, Related impulse response analysis algorithm