OFDM Basic

代码利用DWT算法实现了电子水印技术。 其中包括了水印的插入，提取，以及4种不同的攻击。最后，测量了psnr(This algorithm describe digital watermark algorithm by using DWT. It implements embedding, extraction, and 4 different attacks. in the end, it measures psnr)

基于matlab的图像增强程序 进过多次滤波(Image enhancement based on the matlab program into the filter several times)

对铅酸蓄电池，超级电容，锂电池，三者连接到dc-dc变换器升降压，然后采取不同的控制策略，恒压，恒流，恒功率控制，最后通过逆变器将直流变交流。matlab 仿真(For lead-acid batteries, supercapacitors and lithium batteries, the three are connected to the dc-dc converter to increase and decrease the voltage. Then, different control strategies are adopted to control the constant voltage, constant current and constant power. Finally, the dc converter is changed into an alternating current through the inverter.The matlab simulation)

直接序列扩频通信系统误码率的仿真分析PN码同步方法的比较与仿真-Direct Sequence Spread Spectrum Communication System Simulation and Analysis of BER PN Code Synchronization Methods and Simulation

Execute FILE, searching in the `PATH environment variable if it contains no slashes, with arguments ARGV and environment from `environ .

说明：  《Matlab从入门到精通》所有的源程序。(《Matlab from entry to the master》 all of the source.)

说明：  互相关法的实现。一般多用于图像配准之中，能够求两幅具有角度偏移图像的互相关值大小。互相关值能够应用于众多方面。(Implementation of Cross Correlation Method. Generally used for image registration, can be obtained with two angle offset image cross-correlation value size. The cross-correlation value can be applied to a number of aspects.)

该水印图像算法是基于DWT的零水印，并有信噪比，NC值分析，有助于初学者了解数字水印，每段代码都有备注，方便大家学习与理解

Equation of haar wavelet

一组用来计算不同参考椭球下的坐标变换函数(Geodetic Transformations A set of functions to calculate coordinate transformations between different reference ellipsoids and different projections.)