D4_15072

building a digital channel with calculating ber

通过该功能，可以处理图像中的很多问题，是图像分析处理的主要工具。(image)

说明：  Matlab数值微分的程序，包含下面所列多种微分算法。 MidPoint 中点公式求取导数 ThreePoint 三点法求函数的导数 FivePoint 五点法求函数的导数 DiffBSample 三次样条法求函数的导数 SmartDF 自适应法求函数的导数 CISimpson 辛普森数值微分法法求函数的导数(Matlab numerical differentiation procedure, including a variety of differential algorithm listed below. MidPoint the mid-point derivative formula to strike a three-point method ThreePoint derivative function for a five-point method FivePoint function derivative DiffBSample cubic spline function method of derivative adaptive method SmartDF derivative function CISimpson Simpson numerical differentiation Method derivative function)

Recteneald数值计算一书的所有源码和课件(Recteneald on a numerical calculation of all source and courseware)

说明：  rosenbrock是数值最优化里的一个重要算例，运用MATLAB编程测试算例(rosenbrock numerical optimization is an important example in using the MATLAB programming test examples)

说明：  利用Matlab语言实现三次样条曲线，并且有GUI图形显示，是数值分析的基础(THE code use Matlab，come ture spline )

matlab编程实现线性预测编码（LPC)(Matlab programming linear predictive coding (LPC))

MATLAB中gcf、gca以及gco的区别 有许多使用者会弄混淆 这里给出了详细的差别(Difference in MATLAB gcf, gca and gco have many users will get confused here gives a detailed differences)

Spectral Efficiency in Large-Scale MIMO-OFDM Systems with Per-Antenna Power Cost

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 )