s223_PLL_10b

提供了几种最小二乘法程序包括：批处理最小二乘参数估计，递推最小二乘参数估计，遗忘因子递推最小二乘参数估计，递推增广最小二乘参数估计。(Provides several least squares procedures include: Batch least squares parameter estimation, recursive least squares parameter estimation, forgetting factor recursive least squares parameter estimation, Recursive Extended Least Squares Parameter Estimation.)

利用matlab写的较基本的arnold加密与相应解密算法，其中的key可以任意改之，但加密次数不宜太多，最好在100次以内(Use matlab to write the basic Arnold encryption and decryption algorithm, one of the key can be arbitrary change, but the number of encryption shoulds not be too much, best within 100 times)

PCM/FM信号生成函数，包含基于FM调制以及CPM调制方式，前者是利用matlab中的fm模拟频率调制方式，是对PCM/FM信号比较直观的生成方法，后者是利用CPM信号的生成方法，从相位调制的角度生成。(Here is PCM/FM signal generating function, including on CPM modulation and FM modulation, the former is the use matlab simulation frequency fm modulation method is PCM/FM signal generation method more intuitive, which is generated using the method of CPM signals, generated from the phase angle modulation.)

含有：SPWM内/外置波调速；单闭环电流截止转速负反馈；单闭环电压负反馈；单闭环交流调压调速；单闭环无静差转速负反馈；单闭环有静差转速负反馈；电压负反馈电流正反馈；开环直流；双闭环直流调速仿真(Contains: SPWM internal/external wave speed regulation; single closed-loop current cut-off speed negative feedback; single closed-loop voltage negative feedback; single closed-loop AC voltage regulation speed regulation; single closed-loop zero static error speed negative feedback; single closed-loop with static error speed negative feedback; voltage negative feedback current positive feedback; open-loop DC; double closed-loop DC speed regulation simulation)

plot an ellipse using matlab

matlab图像处理命令，集中了matlab图像处理函数,对初学者很由帮助.(Matlab image processing orders, concentrated Matlab image processing function, right from the very beginners to help.)

EMD工具箱，网上很多EMD工具箱有误或者混乱，本EMD工具箱添加到MATLAB的toolbox即可用。(The EMD Toolbox, a lot EMD toolbox wrong or confusing, this EMD toolbox add to the MATLAB toolbox you can use.)

qpsk的调制解调源码，注释详细。功能正常。很适合学习调制解调的人.文件包含： qpsk_mod_demod.m(qpsk mod and demod procedure qpsk_mod_demod.m)

matlab蔡氏电路系统simulink仿真程序，只要只要改换参数即可(matlab code for chua sysytem,substitude different para can run)

matlab实例clearN=100f=zeros(50,50) f(15:35,23:28)=1 figure(1)imshow(f, notruesize )F=fft2(f,N,N) F2=fftshift(abs(F)) figure(2)x=1:N y=1:N mesh(x,y,F2(x,y)) colormap(gray) colorbar(matlab)