read_grib

在一张表中标注了CTFT，DTFT，DFT之间的对应关系，列出公式，给出了简单认证，同时加上文字说明(Marked in a table of correspondence between CTFT, DTFT, DFT between lists formula gives a simple certification, plus text)

3G系统中，利用扩频技术来扩频的代码。即为PN码产生器的程序代码。(The code of PN generate for spread spectrum tecnology.)

利用二维离散小波，在一幅图像中嵌入水印，并对水印图像进行水印的提取和检测。(Using two-dimensional discrete wavelet, an image embedded in the watermark and image watermark extraction and detection.)

本程序描述的是如何用MATLAB语言来编写低通过程的程序(low-passprocess)

实现大点数的IFFT变换，先进行小点数IFFT变化，然后再进行过采样滤波，有频谱图及例子(Achieve great points IFFT transform, first have a small point IFFT change, and then over-sampling filter, a spectrum and examples)

Marr-Hildreth (LoG) edge detection algorithm

the algorithm is canny edge detector that is used to detect edges in an image.

小波去噪,利用小波系数在相邻尺度上的相关性关系,针对小波系数估计中硬阈值方法和软阈值方法的缺点, 通过对双重量收缩函数得到的阈值乘以一个合适系数进行修定的折衷方法,提出了一种新的小波域局部自适应去噪算法.实验结果表明,该方法既可以去除噪声,又可以较好地保留图像的高频细节特征.(Wavelet denoising using the wavelet coefficients in adjacent scales of the correlation relationship between the estimation of wavelet coefficients for the hard thresholding and soft thresholding shortcomings, through the contraction of the double weight of the threshold function has been multiplied by a suitable coefficient revised compromise, proposed a new wavelet-domain partially adaptive denoising algorithm. The experimental results show that the method can remove noise, also can be used to retain the details of the characteristics of high-frequency images.)

this matlab code is for implementation of rayleigh channel using gans model.

经典DSP书籍，最新的第二版。chm格式，非常清晰。(classic books, the latest version of the second. Chm format, very clear.)