matlab-xiaobobao

说明：  两个方向的二维主成分分析matlab算法(Two directions of two-dimensional principal component analysis algorithm matlab)

扩频通信，从电磁波利用来看，与一般现有的常规通信方式完全不同。扩频通信利用伪随机编码把信息数据（窄带信号）的频谱进行扩展，形成宽带的低功率谱密度信号发射，使用不同的伪随机序列编码，不同通信用户可在同一频段、同一时间工作，互不影响或干扰极小地进行通信。(Spectrum, from the electromagnetic waves used term, and the general existing conventional means of communication is entirely different. Spread spectrum communication using pseudo-random code to the information data (narrowband signal) to extend the spectrum, the formation of low-power spectral density broadband signal transmission, using different pseudo-random sequence of coding, different communication users at the same frequency band, at the same time work, mutual does not affect or interfere with a very small way to communicate.)

计算机辅助设计与仿真技术的概述，文件格式为ppt格式。(Computer-aided design and simulation technologies overview ppt file format format.)

Simple multiobjective optimization

例3：分析占空比为ta的矩形脉冲频谱 T=1 时间窗大小 ta=0.5 占空比 N=256 t=linspace(-T,T,N) ts=2*T/N fs=1/ts (x=zeros(1,N) x(N/2-round(N/2*ta):N/2+round(N/2*ta))=ones(1,2*round(N/2*ta)+1) y=fft(x,N) figure plot(t,x) title([ 时域信号图 占空比为 ,num2str(ta)]) axis([-T T-0.2 1.2]) xlabel( t /s ) figure subplot(211) f=linspace(-fs/2,fs/2,N) plot(f,abs(fftshift(y))/N) title([ 矩形脉冲双边谱 脉冲时间t=[- ,num2str(ta*T), , ,num2str(ta*T), ] ]) xlabel( f /Hz ) )

matlab 程序 ica 独立成分分析主函数（其中没有编制子函数代码）(The main function matlab ica independent component analysis (not one of them to compile a function code) )

实现数据的高通、带阻、低通的数字滤波。 非常适合初学者使用(Data of high-pass, band stop, low-pass digital filtering. Very suitable for beginners to use)

digital image processing

用matlab模拟电场线绘图，四个单位点电荷，电荷性质可改变。(Drawing electric field line simulation using matlab)

说明：  最佳基带系统的源程序 matlab程序示例(the best base-band source of the examples Matlab)