WEIXIN_Location

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)

对于粒子群算法和MATLAB学习者有很大帮助，非常好用的。(PSO algorithm and MATLAB for learners of great help, very useful.)

说明：  介绍用MATLAB实现OFDM技术的文章，其中包括matlab程序。(Introduced the use of MATLAB to achieve OFDM technology articles, including the matlab program.)

维也纳科技大学的关于LTE的系统级仿真平台，可以作为初学者使用。(Vienna university of science and technology, the system about LTE level simulation platform, can be used as a beginner)

基于蒙特卡洛仿真法的OFDM通信的仿真 具有卷积 交织模块(Monte Carlo simulation method based on the OFDM communications with convolutional interleaving module simulation)

经测试可以运行的MATLAB编程实现混合蛙跳算法(After the test you can run MATLAB programming realize SFLA)

一、穆勒矩阵构成 穆勒矩阵是一个4*4的矩阵，完整描述了介质的偏振属性。可通过水平线偏振光H、垂直线偏振光V，45°线偏振光P，右旋圆偏振光R入射，并分别探测水平线偏振光H、垂直线偏振光V，45°线偏振光P，右旋圆偏振光R出射情况下的能量值，即16种偏振态组合下的强度结果，HH/ HV/ HP/ HR，PH/ PV/ PP/ PR，VH/ VV/ VP / VR和RH/ RV/ RP/ RR。进而Mueller矩阵可按照公式（1）计算得到：(First, the Muller matrix The Muller matrix is a 4*4 matrix that completely describes the polarization properties of the medium. The horizontal line, vertical line polarized light polarized light H V, 45 degrees P linearly polarized light, right circularly polarized incident detection and R, respectively, H vertical horizontal line polarized light polarized light V, 45 degrees P linearly polarized light, right circularly polarized light R emitted under the condition of energy intensity results of 16 kinds of polarization combinations HH/ HV/, HP/ HR, PH/ PV/ PP/ PR VH/, VV/ VP and RH/ RV/ RP/ RR / VR. Furthermore, the Mueller matrix can be calculated according to formula (1):)

这是一个用于负荷预测的灰色预测模型GM(1,1),希望对大家了解灰色预测模型及负荷预测有帮助(This is a gray prediction model for load forecasting GM (1,1), we want to understand the gray forecast model Type and load forecasting help)

基于小波变换的数字水印算法matlab代码，可以得到很精确的幅值、频率、相位估计，有CDF三角函数曲线/三维曲线图。( Based on wavelet transform digital watermarking algorithm matlab code, You can get a very accurate amplitude, frequency, phase estimation, There CDF trigonometric curve/3D graphs.)

光纤Bragg光栅的1阶2次模（LP02）的有效折射率和谐振波长的计算测试程序，欢迎拍砖