fengwo

说明：  】利用混沌动力学系统中logistic 映射先对水印图像进行置乱预处理以增强其鲁棒性, 在小波域中将原始音频信号按比例分段, 此比例为原始音频信号低频部分与水印信号个数之比, 然后将水印信号加入到音频信号的 低频部分。用StirMark 攻击后的实验结果表明, 该算法对StirMark 的部分攻击具有一定的鲁棒性。(The logistic- map sequences to encrypt the watermark are used. The original audio signal in DWT (Discrete Wavelet Transform) domain is seperated into some pieces determined by the ratio between the length of the low frequency parts and the length of the encrypted watermark. Every bit of the watermark is added into the relevant pieces of the low frequency parts in the DWT domain. Experimental results show that the algorithm is robust against some StirMark attacks.)

这个是西安电子科技大学的陈怀琛教授编写的《数字信号处理教程——MATLAB释义与实现》(第2版)程序集(This is the Xi' an University of Electronic Science and Technology, prepared by Professor Chen Huaichen " Digital Signal Processing Course- MATLAB Interpretation and Implementation" (2nd edition) assembly)

mc-cdma matlab下的性能仿真(mc-cdma Matlab under the Performance Simulation)

数字基带系统将数字信号从时域上看时数字滚降，需要画出滚降前后的波形展示出来。频域上带宽变化了。输入滤波器之前的波形与采样判决之后的波形。采样判决前的频谱。 采样判决后的码型。 2、眼图（采样判决之前的眼图）（信噪比大眼图清晰） 3、误码曲线，（横坐标时信噪比，纵坐标时误码率） 4、Arfa变化对误码特性的影响，变好还是变差(变好)，眼图清晰度变化（清晰），传递函数的带宽的变化。（带宽越大）(1.Digital baseband system point of view the digital signal from the time domain when the number of roll-off, you need to draw the waveform displayed before and after the roll-out. The frequency domain, the bandwidth change. Input filter and sample ruling before the wave after wave. Sample pre-judgment spectrum. Sampling pattern after the verdict. 2, the eye diagram (eye before sampling decision) (SNR big eye clear) 3, the error curve (abscissa when the signal to noise ratio, bit error rate when the vertical axis) 4, Arfa impact of change on BER performance, get better or worse (getting better), change of eye-definition (clarity), the transfer function of the bandwidth changes. (The greater the bandwidth))

一个AES加密算法的matlab实现代码，是密码学的又一重要加密算法。(A realization of the AES encryption algorithm matlab code, is another key cryptography encryption algorithm.)

计数型抽样检验分析程序 按超几何分布计算(Counting of sampling inspection procedures by calculating the hypergeometric distribution)

Implementation of cl_page for LOVSUB layer.

使用MATLAB编程“支持向量机聚类”与 “支持向量机回归”(Support vector machine clustering and support vector machine regression)

计算SQUIRT 模型，弹性波在饱和多孔介质中传播时，一种微观流动机制(used to realize the Squirt flow model)

离散随机信号的计算机仿真(验证性实验)---仿真协方差函数为C（x)的高斯过程(Computer simulation of discrete stochastic signal validation experiments--- Simulation covariance function C (x) of the Gaussian process)