unix环境下高级变成文档，内容很详尽，还有相应的实例

直接扩展频谱通信系统的伪随机码相位和频偏的串行捕获程序。-Direct spread spectrum communication system of pseudo-random code phase and frequency offset of the serial capture program.

计算机 可以实现加减乘除 大家互相勉励 共同借鉴-Computer subtraction multiplication and division can be achieved

讲解空时编码很好的文章PPT格式，北京邮电大学的教材！-Explain the space-time coding a very good article PPT format, Beijing University of Posts and Telecommunications of teaching materials!

ethernet PoE design material, it is a helpful document for hardware designer.

本程序使用VB语言编程，使用WinSock控件完成的点对点（P2P）聊天和文件传输程序。可以实现两台机器间互发消息，并且有聊天和文件传输记录，安全可靠。-procedures for the use of the VB programming language. Use Winsock Control to complete the peer-to-peer (P2P) file transfer and chat procedures. Can be achieved between the two machines each other copies, as well as chat and file transfer records, safe and reliable.

在开发Windows mobile中经常碰到的问题，帮助开发这少走弯路，提高开发效率。-The questions that many people have meet in developing , to help developer reduing the time and improve the effciency

一个简单的例子:如何从串口读取数据,以及向串口写数据-a simple example : how to read data from the serial port and write data to the serial port

七号信令原理（中文）-SS7 Principle (Chinese)

程控滤波器论文。实现了步进为10dB的0到60dB的可调增益。滤波器部分以可编程开关电容滤波器MAX262芯片为核心，实现了截止频率1KHZ-20KHZ步进1HZ可调的程控滤波器，各项误差低于5％。-Program-controlled filter papers. To realize a step from 0 to 60dB in 10dB of adjustable gain. Filter part of programmable switched capacitor filter MAX262 chip as the core, realize the cut-off frequency 1Hz step 1KHZ-20KHZ program adjustable filter, the error of less than 5.

多线程串口通信程序-multithread serial communication program