GTP信令规定了移动台MS接入GPRS网络的隧道控制和管理协议要求，信令主要执行建立、修改和删除隧道的功能。在用户面，GTP利用GSN之间建立的隧道传送用户数据...

无线通讯模块WM-G-MR-09的datasheet.资料比较详细-WM-G-MR-09的datasheet

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 signals, mainly related to the telephone dial tone of the basic principles of synthesis and identification of the main methods, the use of MATLAB software and the FFT algorithm on the telephone communication system dial tone Synthesis and Recognition . And further the use of MATLAB in the production of graphical user interface simple and intuitive GUI interface simulation. Able to take advantage of matrix synthesis of different fundamental frequency 0- 9 different keys of the dial tone and be able to different dial tone to be the correct identification, the dial tone from a telephone number to resolve the process of completion of the telephone dial tone system, a simple experiment simulation

an overview of GSM network system by aircom

这是个MATLAB教程，讲的挺详细的，挺综合，重点突出，适合初学者看。-This is a MATLAB tutorial, speak very detailed, very comprehensive, focused and look for beginners.

一个好的通讯录程序 用VB所编 赶快下载-a good correspondence with VB procedures prepared by quickly download

一个51的小实验，里面主要是为初学者入门编程和熟悉潜入式编程-A 51 small experiment, which is mainly for beginners entry into the programming and familiar with the programming

从msp430外部时钟管脚输入测试脉冲信号，定时记录脉冲个数，实现精确测频。

vc写的一个终端程序，可支持telnet和串口，标准终端协议。功能很全，且运行稳定。-vc write a terminal program, to support telnet and serial, standard terminal agreement. All very functional, and stable operation.

它全部由我自己做的，为新的学习者，学习 OPNET 的一个例子。包括分组交换机基础

雷达一个点仿真，运行结果可看到二维的sinc函数图像-radar simulation, the results can be seen running the sinc function 2D images