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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)

讲述MATLAB的使用教程，由浅入深讲解详细(About the use of MATLAB tutorial, progressive approach to explain in detail)

主要是数字信号中窗函数的设计与分析，matlab源代码的设计，提供了时域与频域分析(Is mainly the design and analysis of window function in the digital signal, the design of Matlab source code, provides the analysis of time domain and frequency domain)

说明：  编写程序：基类base，有一个私有数据成员n，派生类Derived公有继承基类base，Derived中新增加一个数据成员m(Programming: the base class base, there is a private data member n, the derived class Derived inherits the base class public base, Derived add a new data member m)

两个设备形成对射，当有人通过时，一台设备发出指令，控制别的设备。(Two devices formed on the radio, when someone passed a device to issue commands to control other devices.)

用MATLAB实现图像的离散余弦变换，程序运行结果表明离散余弦变换能够起到压缩图像的目的。(in order to compress the bite of pictur,the program use the DCT to compress.)

matlab exercise hope can be useful

线性调频信号雷达脉冲压缩仿真及程序，chirp信号的产生，压缩及效果(LFM singal simulation)

计算重分析指标，Dq，也是本课题组编写，欢迎使用(To calculate the multifractal Dq curves for multiple time series.)

差分幅度相移键控调制解调系统仿真Differential amplitude and phase shift keying modulation and demodulation system simulation(Differential amplitude and phase shift keying modulation and demodulation system simulation the Differential amplitude and phase the shift keying modulation and demodulation system simulation)