用于卫星通信的卫星通信部分 3 调制技术的基本原理

一个小小而简单的VB通信程序 实现了两端的连接和发送信息， 要知道对方IP和端口-a small and simple VB communication programe which realizes the connection and message between two sides as if get the other one s ip and port

GPRS 通讯，拨号连接。一个很好的 例子 -GPRS communications, dial-up connection. A good example

QAM调制的基本原理 QAM调制实际上是幅度调制和相位调制的组合。相位 + 幅度状态定义了一个数字或数 字的组合。QAM的优点是具有更大的符号率，从而可获得更高的系统效率。通常由符号率 确定占用带宽。因此每个符号的比特（基本信息单位）越多，效率就越高。-QAM modulation of the basic principles are in fact QAM modulation amplitude modulation and phase modulation of the portfolio. Phase+ margin status defines a combination of numbers or figures. The advantage of QAM symbols are greater rate, thus the system efficiency will be higher. Symbol rate is usually determined by the occupied bandwidth. Thus each bit symbols (basic units of information) the more the higher the efficiency.

互动.NET单用户留言簿-interaction.NET single-user Guestbook

移动无线通信小区功率控制中的DPC算法，用于下行功率控制-Mobile wireless communications cell power control in the DPC algorithm for downlink power control

SIP. Understanding the Session Initiation Protocol Second Edition.rar全面介绍SIP RFC3261-SIP. Understanding the Second Session Initiation Protocol Edition.rar introduced SIP RFC3261

适合于无线通信信道编码的交织器的MATLAB编程，刚编写交织器的同学可下载-Suitable for wireless communication channel coding interleaver of MATLAB programming, just to prepare students interleaver can be downloaded

一篇统计文章，计算组合标准差，可用。小样本合并成大样本时候计算标准差

GSMl3层概述,需要了解的朋友可以看一下,是ETSI文档.-GSMl3 outlined layer, need to know you can look at is the ETSI document.

非常实用的Modbus调试工具源码，采用VC6.0 开发，主要用于调试Modbus设备，软件功能使用，实现原理简单，是调试支持Modbus协议自动化设备的必备工具