qpsk & ofdm in awgn channel

基于手机平台的人脸识别系统设计，很前沿的东西。值得珍藏-Mobile phone platform based on face recognition system design, it is the forefront of things. Worthy of collection

本例子详细介绍了如何编制一个利用win32串口API函数，通过读写串口控制MODEM，进而实现远程数据传输的程序。-the detailed examples of how to use the preparation of a Serial win32 API functions to read and write through the modem serial port control, thereby achieving long-distance data transmission procedures.

TCP-IP技术大全2-TCP-IP technology Series 2

中文RFC文件，无需翻译，对学习很有帮助！

如何使用SMPP协议开发,开发短消息通迅-smpp

对象标识符的URN命名空间

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.

老外写的串口和并口的操作源码-foreigners write the serial and parallel operation FOSS

tcp/ip 通讯服务器端程序-tcp/ip server communications procedures

modbus 通讯协议文档，详细描述了RTU、ASCII两种模式下，数据格式。-modbus connection communication protocol document, a detailed description of RTU, both ASCII mode, data format.