精通mantlab7这本书的例子！1

matlab 的s函数模板，用s函数是，在这个基础上修改后就可以用了！！(matlab s-function template, use the s function is, on this basis can be modified after it! !)

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：  这些是卷积译码程序m文件，其中viterbi.m为卷积译码程序，其余的m文件为viterbi.m中用到的子函数。均已调通，并加上注释！(These are the convolutional decoding process m paper viterbi.m for the convolutional decoding process, the rest of the m file viterbi.m used in subroutine. Have been transferred pass, and to add comments!)

说明：  用matlab建立任意桁架模型，计算节点矩阵，约束矩阵等(Using matlab to establish any truss model, compute node matrix, constraint matrix, etc.)

solar pv mppt system

数值微分三点公式法，一个用于求解微分的程序，用三点发，精度较高。-err

该程序实现了对语言信号的降噪。这是个有用的软件(The program language signals to achieve a noise reduction. This is a useful software)

BP神经网络图像分类程序,代码很好懂，适合初学者。样本选的不是很大。(BP neural network image classification procedures, code easy to understand for beginners. Sample selected is not great.)

OFDMA is an emerging and effective technique in optimizing the performance of 4G plus network

burst error correection in coding theory