Statistical-Signal-Processing

余弦波是渐变的，当ωt+φ的取值变化量很小时，Y的变化量也是很微小的。余弦波的这一特性保证了嵌入水印后相邻字符灰度值差别不大，人眼无法识别，从而保证了水印的不可见性和图像质量。(Cosine wave is gradual, and when ωt+ φ values variation is very small, Y amount of change is very small. Cosine waves This feature ensures that watermarked gray value of adjacent character is not very different, the human eye does not recognize, thus ensuring the invisibility of watermark and image quality.)

useful resources in matlab

说明：  matlab软件的使用基础知识3.关于矩阵计算，特征值，特殊矩阵的生成等等(matlab basic knowledge of the use of software 3. on the matrix, the characteristic value, the generation of a special matrix, etc.)

说明：  一篇详细讲解了常数模盲均衡算法的各种改进方法的文章，读了之后很有启发(A detailed explanation of the constant modulus algorithm for blind equalization of various methods for improving the article, after a very enlightening read)

建模仿真, matlab 应用仿真， 对ADc理解很有帮助(pipelined_adc_wo_background_cal_dec )

此代码仿真了一个语音输入输出系统，语音信号经过AD转换后，经过DSSS调制解调后，通过DA转换还原输入的声音，每一步的的波形都可以观测，对实际DSSS系统设计有很大的参考价值(This code simulation of a voice input and output systems, speech signal after AD conversion after DSSS modem through DA conversion to restore the input voice, each step of the waveform can be observed, the actual design of DSSS systems have great reference value)

get the entropy of french book

说明：  DE算法,matlab的实现，可以直接进行优化，很好用的(DE Algrothm)

改进的等维新息灰色模型，还有残差数列检验，后验差检验，模型精确好用。(Improved Innovation Gray Model，There are residual series test, posterior difference test, model accuracy easy to use. )

EM Wave propagation and antenna analysis m-files: