codelength_recogcompare_BCH157

MIMO decoupling with dynamic decoupling

modulation techniques in communication

ICA算法的提出者Aapo Hyvarinen提供的FastICA算法，经典中的经典。(Author Aapo Hyvarinen ICA algorithm FastICA algorithm is available, the classic of classics.)

MATLAB 程序，实现2ASK数字信号的产生。(The MATLAB program generation of 2ASK digital signal.)

matlab中值滤波源代码，对于图像处理的人员有一定的参考意义。。(median filter matlab source code for image processing personnel have some reference value. .)

完整的FFT代码，用C#编写，试用过，很好，欢迎下载。(Complete FFT code, written in C#, tried, well, welcome to download.)

Matlab source code for DCT-based watermarking for grayscale images. DCT-based watermark recovering without resorting to the uncorrupted original image. Digital watermarking has been proposed as a viable solution to the need of copyright protection and authentication of multimedia data in a networked environment, since it makes possible to identify the author, owner, distributor or authorized consumer of a document. A new watermarking technique to add a code to digital images is presented: the method operates in the frequency domain embedding a pseudo-random sequence of real numbers in a selected set of DCT coefficients. Watermark casting is performed by exploiting the masking characteristics of the Human Visual System, to ensure watermark invisibility. The embedded sequence is extracted without resorting to the original image, so that the proposed technique represents a major improvement to methods relying on the comparison between the watermarked and original images.

说明：  s=21的s-随机交织图样代码 matlab下生成1024位图样，直接运行(s = 21 for s-random interleaver design code)

matlab中采样mp3格式的音频文件的程序，包含注释。(matlab mp3 audio sample rate)

信号方差计算，对初学者有很大帮助.请有用的欢迎下载(Signal variance, of great help for beginners. Useful welcome to download)