Yan_Yi_4PAM

说明：  设计一个理想通信系统，实现信息字符流的传输。 发射器： <1>将消息（字符串形式）编码成一个符号序列； <2>用脉冲成形将串符号序列转变成模拟脉冲信号； <3>将模拟脉冲信号调制到载波信号上。 接收器： <1>对接收的信号进行采样； <2>解调信号成基带信号； <3>将信号恢复成字符串。(Design an ideal communication system, the realization information transmission of character flow. Emitters: < 1 > will news (string form) coding into a symbol sequence < 2 > by using a pulse forming will string of symbols into a simulation pulse signal sequences < 3 > will simulate the pulse signal modulation to carrier signal. Receiver: < 1 > of received signal sampling < 2 > demodulation signal into baseband signal < 3 > will signal back into a string.)

该代码可以用，MATLAB实现图像信息熵计算，在图像处理中很实用，评价图像质量。(This code can be used, MATLAB for image information entropy calculations, image processing is very practical, uate the image quality.)

lzw编码，gif图片编码，lena图的lzw可变长编解码(lzw encoding the gif picture coding, lena graph lzw variable length code decoding)

说明：  Hessian矩阵计算，在matlab下开发，二维三维(Hessian matrix calculations, developed under matlab, two-dimensional three-dimensional)

MIMO技术，信噪比SNR和误码率BER的关系对比图像，MATLAB仿真程序代码(MIMO technology, signal-to-noise ratio SNR and bit error rate (BER) the relationship between contrast images, MATLAB simulation program code)

基于随机正态分布的四边简支复合材料层合板的最佳铺层顺序求解(Optimum Laying Sequence of Simply Supported Composite Laminates with Four Sides Based on Stochastic Normal Distribution)

各种matlab代码，实现各种功能，供查阅者参考，熟悉matlab软件的使用(x=linspace(0,1,21) y=linspace(0,1,21) [X,Y]=meshgrid(x,y) z=(X.*Y)./(X+Y) meshc(X,Y,z) )

used to encrypt the input image using RAS algorithm

This is a good file.

复信号情况的基于信号先验特性函数的欠定盲分离(Blind Identification of Underdetermined Mixtures Based on the Characteristic Function The Complex Case)