音频信号通过LM386放大，ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块，基于小波变换的数字水印算法matlab代码。- LM386 audio signal amplification, ofdm system simulation including 16qam modulation fft windowing modules plus cp, Based on wavelet transform digital watermarking algorithm matlab