7641ba3a56ff

说明：  matlab与数学建模--源程序 我是初学者，大家可以参考一下(matlab mathematical modeling- source I am a beginner, we can refer to)

code qpsk for qpsk semilogy

异步电机矢量控制仿真，包含各种基础矢量控制仿真，包含速度环，电流环，励磁环等。(Asynchronous motor vector control simulation, including a variety of basic vector control simulation, including speed loop, current loop, excitation ring, etc.)

OVSF，正交可变扩频因子，WCDMA扩频码(OVSF, orthogonal variable spreading factor, WCDMA spreading codes)

It is a matlab program to implement mimo for a single modulation tech and used to detrmine BER

说明：  调用normfit函数求正态总体参数的最大似然估计和置信区间(Normfit function calls seeking normal population parameters of maximum likelihood estimates and confidence intervals)

该文件中包含了详细的matlab实现的源代码，很适合初学者入门。代码的运行环境有要求： 1. 软件环境 需要安装暴风影音才能正常播放.WMV文件； MATLAB R2011b 版本的软件。 2. 硬件环境 处理器：CPU主频不低于1GHz； 内存：不小于256MB； 硬盘：不小于10GB； 显示器：支持1024*768分辨率。(The file contains a detailed matlab realize the source code, it is suitable for beginners. Operating environment code required: 1 Software Environment         STORM need to be installed in order to play properly .WMV file         MATLAB R2011b version of the software.     2 hardware environment         Processor: CPU clock speed of not less than 1GHz         Memory: not less than 256MB         Hard disk: not less than 10GB         Display: 1024* 768 resolution.)

布莱克曼窗是一个比较适合复杂的窗，它的衰减很大，做成录波器容易满足指标(Blackman window is a more suitable for complex window, its large attenuation, made recorder easily satisfied index )

说明：   empirical formula with kaiser clc clear all fs=1000 fc=250 df=50 r=0.001 f=fc/fs dw=2*pi*(df/fs) a=-20*log(r) n=floor(((a-8)/(2.285*dw))+1) if a>50 b=0.1102*(a-8.7) elseif a>=21 && a<=50 b=0.5842*((a-21)^0.4)+0.07886*(a-21) elseif a<21 b=0.0 end w=kaiser(n,b) for i=1:n if i~=(n-1)/2 hd(i)= (2*f*sin((i-((n-1)/2))*2*pi*f))/((i-((n-1)/2))*2*pi*f) elseif i==(n-1)/2 hd(i)=2*f end end for j=1:n h(j)=w(j)*hd(j) end subplot(3,1,1), plot(w) subplot(3,1,2), plot(h) subplot(3,1,3), plot(h,n)

A/D convertor, PCM, quantization