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本文主要阐述了DTMF的原理及如何在MATLAB上产生DTMF信号，主要涉及到电话拨号音合成的基本原理及识别的主要方法，利用 MATLAB 软件以及 FFT 算法实现对电话通信系统中拨号音的合成与识别。并进一步利用 MATLAB 中的图形用户界面 GUI 制作简单直观的模拟界面。 能够利用矩阵不同的基频合成 0 － 9 不同按键的拨号音，并能够对不同的拨号音加以正确的识别，实现由拨号音解析出电话号码的过程，完成对电话拨号音系统的简单的实验仿真。-This paper described the principle and how DTMF in MATLAB to generate DTMF(This paper describes the principle of DTMF and how MATLAB to generate DTMF signals, mainly related to the telephone dial tone and identification of the basic principles of synthesis of the main method, using MATLAB software, and the FFT algorithm to the telephone communication system, the synthesis and identification of dial tone . And further the use of MATLAB' s graphical user interface simple and intuitive GUI make the analog interface. Able to use a different fundamental frequency matrix synthesis of 0- 9 different button dial tone and can be different correct identification of dial tone to achieve by the dial tone of the process of parsing a telephone number to complete the telephone dial tone system, a simple experiment simulation.-This paper described the principle and how DTMF in MATLAB to generate DTMF)

刘利生所著外弹道测量数据处理一书的电子版，比本站版本更为清晰的版本。(Exterior ballistic measurement data processing，author liu li sheng,2001.)

用于无线通信系统中提高通信质量、减小误码率的有效措施的操作工具(Used in wireless communication systems to improve communication quality, effective measures to reduce the error rate)

利用MATLAB语言仿真截断正态分布函数(Simulation using MATLAB language truncated normal distribution function)

用matlab实现图像融合，并且具有图片(Achieve image fusion using matlab)

这是一个单纯形法的Matlab程序，用于无约束非线性规划问题(Simplex method)

the matlab fem code for some beginers .you can have a look

无线衰落信道之瑞利衰弱的仿真 可以做出多径瑞利的仿真 (Simulation of Rayleigh weak)

voltage-boosting converter, named as KY converter, was proposed, which provides low output voltage ripple and is very suitable for supplying power to devices that must operate under low-ripple conditions.

通过对摄像镜头拍摄得到的图片进行失真复原，确定相应摄像头的固定失真系数，从而解决该摄像镜头的失真问题。(Image captured by the imaging lens distortion recovery, to determine the appropriate camera fixed distortion coefficient, so as to solve the problem of the distortion of the imaging lens.)