hl-20

认知无线电下中继传输场景，DF与AF在判决条件下进行转换(wireless nerwork based on relay with transformation between AF and DF in cognitive radio)

1、Rayleigh_Doppler_singlePath.m 产生单径Rayleigh衰落，采用了6种方法并进行了比较，推荐使用第6种方法； 2、Rayleigh_Doppler_multiPath.m 根据多条径的延时和强度，产生频率选择性衰落； 在单径和多径两个程序中，均提供了其功率谱的输出代码； (1, Rayleigh_Doppler_singlePath.m Single Path Rayleigh fading generated using the six kinds of methods and compared recommend using the first six kinds of methods 2, Rayleigh_Doppler_multiPath.m Drive under a number of delay and intensity, resulting in frequency selective fading in single-track and multi-path two procedures, which provide the power spectrum of the output code )

说明：  《Matlab从入门到精通》所有的源程序。(《Matlab from entry to the master》 all of the source.)

潮流计算C++程序，计算ieee4 5 14 30 57 118 300(Power Flow calculation program)

spectrum_sub是谱减函数，使用谱减的方法达到降噪的目的，对于一般的平稳信号效果特别好。(Spectrum_sub is spectral subtraction function, using the spectral subtraction method to achieve the purpose of noise reduction, for general stationary signal effect is very good.)

matlab 编写的画图程序，用来画电阻率曲线的代码。(matlab prepared Paint program, used to draw resistivity curve code.)

掺5 MgO的PPLN晶体温度调谐曲线，泵浦光1064nm，周期为29.5,30,30.5,31,31.5um(5 MgO doped PPLN crystal temperature tuning curve of the pump laser 1064nm, period 29.5,30,30.5,31,31.5um)

通过一些用MATLAB处理图像的例子来让初学者入门。使得初学者对图像处理有个好的了解(Through a number of examples of image processing using MATLAB to let beginners started. Allows beginners have a good understanding of image processing)

MATLAB图像标记，可以对图像中的你感兴趣的区域进行提取和标记，为后续分析提供帮助，程序可运行(MATLAB image tag, the image of the region of interest you can be extracted and tag, provide help for subsequent analysis, program can be run)

二阶电路的Matlab仿真，该文给出二阶电路仿真实例, 不仅给出计算结果, 并绘出仿真曲线.(Matlab simulation of second order circuit, the article gives examples of second-order circuit simulation, not only gives the results, and draw the simulation curve.)