Ev_Model

说明：  二阶巴特沃斯(Butterworth)低通滤波器(Low pass filter)

These programs are used to calcualted a Duel phase lag model with different methods.

采用平面波展开法模拟2维光子晶体的能带结构,FDTD法模拟2维光子晶体能量传输(used plane wave expansion method for simulation of two-dimensional photonic crystal structure of the band, FDTD simulation of two-dimensional photonic crystal energy transmission)

Phase_Unwrapping_2D，对SAR干涉图进行二维相位解缠(Phase_Unwrapping_2D,the program for 2D Phase Unwrapping)

帧间编码，通过matlab实现的，代码通俗易懂，较为实用，可以用于对编码的初步学习(Inter-coded, implemented by matlab code easy to understand, more practical, can be used for a preliminary study of the coding)

变采样和多相滤波器的实现。本程序实现了一个变采样程序，中间设计滤波器设计和插值抽取。其中滤波器设计用的是窗函数法，根据要求设计窗函数，得到窗函数的长度。接着是插值，滤波，抽取，得到最后变采样之后的波形文件、另外对比了用直接卷积和多相分解卷积两种方法最后的结果。 (Implementation of variable sampling and polyphase filter. This procedure implements a variable sampling procedures, intermediate design and interpolation and decimation filter design. The filter design is using the window function method, according to the requirements of the design of window function, get the length of the window function. Then the interpolation, filtering, extraction, and finally obtain the variable wave file, sampling after the addition of contrast and polyphase decomposition results of two methods for convolution last direct convolution.)

多普勒matlab仿真,利用MATLAB仿真程序实现,多普勒流量计的理论模型的仿真过程，可以在界面清晰的看见各信道信号的波形(Doppler matlab simulation using MATLAB simulation program realize, Doppler flowmeter theoretical model of simulation, you can clearly see the interface of the channel signal waveform)

产生2fsk或4fsk的调制信号，可以控制带宽，中心频率，噪声，可以观察频谱(this can product signal)

amlify and forward locations in coperative communications system

说明：  Feedback quantization in LTE: