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使用MATLAB 代码完成COSTAS环对QPSK调制的解调载波频率的跟踪(Use MATLAB code completion COSTAS loop tracking of QPSK modulation carrier frequency demodulation)

数模题目代码，一个简易的matlabUI动画演示程序(Modulus subject code, a simple animation demo program matlabUI)

主要用途是对抗多径衰落。由于多径衰落的存在，使得同一个帧由于路径不同，到达用户端的时延有先有后。在相关的频域上的会造成子载波之间的相互干扰，影响 性能。另外，由于有了循环前缀，使得IFFT FFT操作把原来的线性卷积变成循环卷积，大大简化了相应的信号处理复杂度(The main purpose is to fight against multipath fading. Due to the presence of multipath fading, the first after they have the same frame different paths to reach the client delay. Would cause mutual interference between sub-carriers in the frequency domain, affecting performance. In addition, thanks to the cyclic prefix, so IFFT FFT operation to the linear convolution of the original into a circular convolution, greatly simplifying the corresponding signal processing complexity)

以UDP的形式向flightgear发送信息 源码用VC编写，flightgear为2.0.0版本(Send a message with the VC,for flightgear)

Matlab自动生成代码的教程，可用于汽车，航天等行业(Matlab tutorial automatically generated code can be used in automotive, aerospace and other industries)

电磁场与电磁波第四版的答案，比较详细，有用(Electromagnetic field and wave the fourth edition of the answer, more detailed, useful)

间接法功率谱分析代码，数字信号处理领域常用(Indirect method power spectrum analysis code, and digital signal processing used)

这是关于信号处理方面的知识，对matlab的卡尔曼滤波十分重要(This is knowledge about signal processing and it is very importance of kalman filter for matlab )

根据夏道止老师编的电力系统分析教材里的潮流计算原理编写的(Calculated in accordance with the principles of writing Harcourt Road teacher only power system analysis compiled textbooks trend)

function [ H ,S ] = HS( f ) UNTITLED2 Summary of this function goes here Detailed explanation goes here syms x1 x2 f1=diff(f,x1) f2=diff(f,x2) S= [f1 f2] H = [diff(f1,x1) diff(f1,x2) diff(f2,x1) diff(f2,x2)] end s0=subs(S,findsym(S),[0 0])(function [H, S] = HS (f) UNTITLED2 Summary of this function goes here Detailed explanation goes here syms x1 x2 f1 = diff (f, x1) f2 = diff (f, x2) S = [f1 f2] H = [diff (f1, x1) diff (f1, x2) diff (f2, x1) diff (f2, x2)] end s0 = subs (S, findsym (S), [0 0 ]))