本片文章语言为英文，matlab中关于fft2的频谱分析。

软电话 从功能分为：服务器端和客户端 服务器：记录所有客户的信息，对客户的登陆、注销等请求进行响应 客户端：利用UDP协议与服务器和被叫或主叫客户端进行通讯 点对点通讯中的请求和响应消息是通过SIP协议来完成传输的，音频信息（压缩后）是同构RTP协议来完成传输的-Soft phone functionality is divided into: server-side and client-server: a record of all customer information, customer landing, write-offs, such as in response to client requests: the use of UDP protocol with the server and the called or caller client communication point of point communication in the request and response messages through the SIP protocol to complete the transmission, audio information (compressed) is isomorphic RTP protocol to complete the transmission

qpsk调制在awgn/rayleigh信道下的误码性能比较，以及信号的功率谱和星座图-QPSK modulation in awgn/Rayleigh Channel Performance Comparison of error, and the signal power spectrum and constellation

源代码展示了VC下命名管道的用法 详细代码示范命名管道的建立、通信、应用基本方法，思路清晰明了。

端口专家是一个优秀的端口（串口、并口）监视、调试程序，有以下基本功能： 1.能动态设置各种通讯速率、奇偶校验、数据位、停止位和流控； 2.可以16进制形式自动显示接收到的数据，并能同时发送ASCII码（包括中文）和16进制字符串，可以任意设定自动发送周期,定时发送数据； 3.能将接收数据保存成文本文件,便于比较观察；并能发送任意大小的数据文件（以二进制形式发送）； 4.能自动保存设置参数，无需每次重新设置。-port experts is a good ports (serial, parallel) monitoring, debugging procedures, the following basic functions : 1. Dynamically created various communications rate, parity, data bits, stop-and flow control; 2. May 16-band automatic form of data received and at the same time sending ASCII (including Chinese) and 16 string band can be set to automatically send arbitrary cycle, regularly send data; 3. preservation can receive data into text files, facilitate comparison of observation; and the ability to send any size of paper (in binary form Send); 4. Save the settings automatically parameters, each without re-instated.

Class B Data Communications Network Interface

sip 揭密英文版，学习sip协议很好的教程，可以与中文版一块阅读。-Inside sip English, learning a good tutorial sip agreement, with the Chinese version of a piece of reading.

The SL11RIDE is a low cost, high speed Universal Serial Bus RISC based Controller board. It contains a 16-bit RISC processor with built in SL11RIDE ROM to greatly reduce firmware development efforts. Its serial flash EEPROM interface offers low cost storage for USB device configuration and customer product specific functions. New functions can be programmed into the I2C by downloading it from a USB Host PC. This unique architecture provides the ability to upgrade products, in the field, without changing the peripheral hardware.-USB IDE solution

XR17D158V driver for CE5.0 header file

一个VB控制并口的通讯的源代码,显示如何用VB控制并口通讯-a VB control of the parameter of source code, and show how VB control Parallel Communications

利用voip打电话，是一个OpenH323的应用-an OpenH323 application ,enable you make a call via voip