本教程主要介绍了数据通信基础，通用串行通信标准和通用MOdem命令以及嵌入式汇编语言开发通信程序。-This tutorial focuses on the data communication infrastructure, universal serial communications standards and common MOdem command and embedded assembly language development communication program.

This code is written for 8051 microcontroller in assembly language. It sends SMS continuously using GSM modem,if GSM modem is connected to its serial port.

基本的调制解调程序集(包BPSK,QPSK,QAM,GMSK等)基于MATLAB的信号处理方式，非常详细。-The basic modem assembly (including BPSK, QPSK, QAM, GMSK, etc.) based on MATLAB signal processing side Type, very detailed.