matlab_word

初步学习matlab的学习资料，本资料包含《现代通信系统使用matlab》，《数字信号处理及matlab实现》，《matlab信号处理及详解》，《matlab通信仿真与应用》等资料，是通信专业理论学习，很好的资料(Matlab preliminary study of learning materials, this information includes " the use of modern communication systems matlab" , " digital signal processing and matlab to achieve" , " matlab signal processing and 详解" , " matlab simulation and application of communication" and other information, is a communications professional theory learning, good information)

说明：  动态可变环境下基于信标节点间的信号动态计算当前环境下的路径衰落指数，(A method to accucalate the true path loss exponent in dynamic environment!)

this proggram s name is huffcode and it s written in matlab and as its name is clear, it gives hufmman code for probability vector

说明：  根据已有的数据，进行Logistic曲线拟合,代码是对中国今日新冠确诊人数的拟合(The code is about logistic fitting.)

M=512 原图像长度 N=64 K=8 I=zeros(M,M) J=zeros(N,N) BLOCK=zeros(K,K) 显示原图像 I=imread( f:ceshiyuanshitu.bmp ) figure imshow(I) xlabel( 原始图像 ) 显示水印图像 J=imread( f:ceshilogistic_nuaa64.bmp ) figure imshow(J) xlabel( 水印图像 ) 嵌入水印 tem=1 for p=1:N for q=1:N x=(p-1)*K+1 y=(q-1)*K+1 BLOCK=I(x:x+K-1,y:y+K-1) BLOCK=dct2(BLOCK) if J(p,q)==0 a=-1 else a=1 end BLOCK(2,1)=BLOCK(2,1)*(1+a*0.01) BLOCK=idct2(BLOCK) I(x:x+K-1,y:y+K-1)=BLOCK end end 显示嵌入水印后的图像 figure imshow(I) xlabel( 嵌入水印后的图像 ) imwrite(I, f:ceshiembedded.bmp )

超声波扫查中，用线性阵元实现实现线性扫查，扫查体为自定义囊，对接收的回波数据进行hilber变换，获得其包络信息，在对包络信息进行对数压缩，用8为2进制数显示()

继续上传基于稳态kalman滤波器事例讲解，这里可以不需要考虑观测系统中的噪声。(to upload based on steady-state Kalman filter on the case, it need not consider here Observing System of noise.)

hough2005用于检测圆的半径和圆的位置(hough2005 for detecting Yuan Yuan and the radius of the location)

PCM编码MATLAB实现，能够在MATLAB环境下实现PCM量化编码，编码效率高，编码易于实现，简单易懂(PCM coding MATLAB, the MATLAB environment to achieve PCM quantization coding, coding efficiency, coding is easy to implement, easy to understand)

基于MATLAB的信号均衡器与分离器的程序(MATLAB signal equalizer separator-based programs)