ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块，使用混沌与分形分析的例程，实现了图像的加水印，去噪，加噪声等功能。- ofdm system simulation including 16qam modulation fft windowing modules plus cp, Use Chaos and fractal analysis routines, Realize image watermarking, de-noising, plus noise and other functions.