finger_vein_extraction_v2.0

线性调频信号是一种雷达常用的电磁波信号，当雷达信号检测到目标时候，反射后得到雷达回波信号，此时由于多普勒效应，信号的频率发生偏移，这个源码仿真出雷达检测到目标速度信息的回波信号。(LFM signal is a commonly used electromagnetic radar signal, when the radar signal detection to the target time, after reflection of radar echo signal, at this time due to Doppler effect, the signal)

This is excersis solution of the chapter 7th of AFT text book which i have uploaded previopusly.

说明：  用ar法模拟脉动风时程的详细的程序，供大家参考讨论(Fluctuating wind ar Law Moot time program, for your reference discussion)

time variable problem using MATLAB

图像自动识别程序（三角形，圆形，正方形）(Image Auto-recognition program (triangle, circle, square))

.MDL FILE REPRESTNTS EXCITER OF IEEE-TYPE 4..WORKS IN MATLAB ALL VERSIONS

SVM主程序,专门用来调用SVM程序的,主要是先建模再验证，得出较好的分类器。(SVMmain program，for using SVM to classify)

对仿真信号进行小波分解，进行小波阈值降噪处理(Wavelet Denoise)

说明：  小波变换的模极大值判断冲击函数、阶跃函数、三角形函数的奇异性(Wavelet transform modulus maxima to determine the impact of function,step function, the singularity of the triangle function)

周期图法在雷达信号处理、目标检测、以及目标跟踪中有重要作用。他的主要特点为从噪声中将所需要的周期信号的特征以功率谱的形式表征出来，通过设置合适的阈值可以代表目标。调频信号则是典型的脉冲压缩信号，其扩频特性使得其不易受噪声干扰。(Periodogram in radar signal processing, target detection, and target tracking plays an important role. His main characteristics will be required from the noise characteristics of periodic signals in the form of the power spectrum characterized it, by setting the appropriate threshold may represent the target. FM signal is a typical pulse compression signal, the spreading characteristics make it less susceptible to noise interference.)