WaveMarking

基于Logistic混沌映射的图像加密 将图像数据转换成二进制数据，并采用Logistic进行混沌序列生成，然后设定阈值将其转换成二值序列，之后，设定加密规则，将二进制图像数据与混沌二值序列进行加密运算，实现图像加密(Based on Logistic chaos mapping image encryption)

This function used for mapping gray data after equalization with many method into image.

the use of coherent space-frequency coding in orthogonal frequency division multiplexing (OFDM)-based frequency-selective multiple-input multiple-output (MIMO) antenna fading channels has been proposed. Acquiring knowledge of the fading coefficients in a MIMO channel is already very challenging in the frequency-flat (fast) fading case. In the frequency-selective case, this task becomes significantly more difficult due to the presence of multiple paths, which results in an increased number of parameters to be estimated. In this paper, we address code design for noncoherent frequency-selective MIMO-OFDM fading links, where neither the transmitter nor the receiver knows the channel. We derive the code design criteria

瑞丽衰落和莱斯衰落的对比 瑞利衰落（Rayleigh Fading）：在无线通信信道中，由于信号进行多径传播达到接收点处的场强来自不同传播的路径，各条路径延时时间是不同的，而各个方向分量波的叠加，又产生了驻波场强，从而形成信号快衰落称为瑞利衰落。瑞利衰落属于小尺度的衰落效应，它总是叠加于如阴影、衰减等大尺度衰落效应上。(rice fading and rayleigh fading)

说明：  计算机仿真模拟光学实验——杨氏双缝干涉实验！(双缝干涉)

数字通信原理_基于matlab仿真计算，包含大量实例程序(Digital Communications _ matlab-based simulation, the program contains a number of examples)

*** Losided Iteration (A= P^T) ****

这是一本关于雷达系统仿真的matlab英文书，非常系统的介绍了雷达系统的仿真。(This is the one on the radar system simulation matlab English books, very systematic introduction to the radar system simulation.)

根据系统的输入和输出，辨识系统的的传递函数。该系统为6阶系统，通过降阶降为2阶后，加入状态反馈和状态观测器，调整参数使2阶系统稳定，最后用于控制原6阶系统。阶跃响应和bode图效果都不错。(Based on the input and output of the system, the transfer function of the system is identified. The system is a 6 order system. After the order is reduced to 2 order, the system is added with the state feedback and the state observer, which adjusts the parameters to make the 2 order system stable. Finally, it is used to control the original 6 order system. Step response and Bode figure results are good.)

奇异值分解法计算李雅普诺夫指数谱，程序亲测快速有效(Singular value decomposition method to calculate the Lyapunov exponent spectrum, pro-test program quickly and efficiently)