详细画出了时域和频域的相关图，实现了图像的加水印，去噪，加噪声等功能，单径或多径瑞利衰落信道仿真。- Correlation diagram shown in detail the time domain and frequency domain, Realize image watermarking, de-noising, plus noise and other functions, Single path or multipath Rayleigh fading channel simu