noise

contrast of an image

This short demo presents an efficient algorithm for edge detection

gauss消去法解线性方程组，系数矩阵A存放于数组A中(Gauss elimination method solving linear equations, A of the coefficient matrix A stored in an array)

MATLAB入门教程的附带程序，适合初学者学习matlab( Fringe code of a MATLAB book .It is fit for beginners to learn matlab.)

本代码是全通系统和最小相位系统的零极点和幅频和相频的响应(The code is all-pass system and the minimum phase zero poles and frequency and phase frequency response)

geometrical detection of faces

分别用三种不同的差分近似公式（前向差分、后项差分和中心差分）来技术函数的近似值(Respectively with three different difference approximation formula (forward difference, backward difference and central difference) approximation to the technical function)

4 QAM Spatial modulation with maximum likehood detection

MATLABR2007教程以及i习题和答案，源码等，很好是清华出版社的(MATLABR2007)

用matlab做的qam的基本原理仿真，清晰明了，有相应结果，可作为qam调制的入门教程。(QAM matlab to do with the basic principles of simulation, clarity, have corresponding results can be used as QAM Modulation Tutorial.)