Win32串口编程技术,vc++环境下，可以帮助你在短时间内理解串口编程，当然最好的方法还是看msdn....

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

关于GPS定位方程式的讲述，是台北的Jeff写的，我把它编程了文档，发给大家，一起拿来学习。-GPS positioning on the formula described is written in Taipei, Jeff, and I recommend it programmers the document, distributed to you, used to study together.

本例用matlab语言实现了4QPSK的编解码及通过awgn信道的仿真。采用蒙特卡罗仿真法，得到误码性能，绘制曲线。可用于算法研究或课程学习。-Matlab language used in this case achieved 4QPSK codec and channel through awgn simulation. Monte Carlo simulation method, the BER performance, drawing curves. Algorithm can be used for research or courses.

/*

手机短信编码规则，可以教你学会手机短信编码-SMS coding rules, you can teach Institute SMS coding

简易手机软件系统，具有话音，短信等基本业务处理功能，用Telelogic Tau SDL and TTCN Suite 4.4完成，含完整开发文档，已编译通过-simple software system for cell phone,including basic function in processing vioce,SMS. Developed by using Tau SDL and TTCN Suite4.4,completed documentation and compiled.

基于ARM的码激励线性预测编解码系统的实现-ARM-based code excited linear prediction codec system

RN8209计量芯片，采集电压电流，计算电量，有功功率，无功功率，支持防窃电功能，rn8209串口通信，原厂提供的代码，可以下载直接使用。

向西门子PLC的数据块DB写入上位机数据，实现PC与PLC间的通信-Siemens PLC to the data blocks DB write PC data, the realization of PC and PLC communication

这是一个通讯软件-This is a communications software