Construct the short length of QC LDPC codes without girth 4 and girth 6

GPS NEMA 0183协议（中文）-GPS NEMA 0183 agreement (Chinese)

ami码，单极性不归零码的matlab仿真的实现，属于本人课内作业-ami yards Unipolar not NRZ Simulation of Matlab, I belong to the reverse operation

涉及Fax/Mail/Voice通讯编程的一个程序 -An example of Fax/Mail/Voice communication programming

ASK通信编程仿真源程序-ASK communication simulation programming source

中国移动MMS规范，主要描述了中国移动彩信平台的结构概述，相信您读完对，整个彩信体系会有一定的了解-China Mobile MMS norms, the main description of China Mobile MMS platform structure outlined, I believe you read right, MMS system as a whole will have a better understanding

学通讯电子工程的必会的知识之一,打开看看吧!-electronic communications school project will be one of the knowledge, open look!

uwb_ppm_bpsk的源码,可以由此学习UWB的调制解调方式,对研究UWB有很大帮助-uwb_ppm_bpsk source code, which can study the UWB modulation and demodulation, UWB research will be of great help

本程序包包含有linux下socket通讯的tcp例程，包含有tcp的服务器端和客户端，含有C语言以及perl两种实现，本人整理，全部能运行。-bags containing the procedures under linux tcp socket communications routines, including a tcp servers and clients, containing C and perl language to achieve both, I collated all can run.

P2P之UDP穿透NAT的原理与实现(附源代码).htm-P2P之UDP NAT htm

虽然Windows下可视化开发工具如VC、Delphi、C＋＋ Builder等都有专用的定时器控件Timer，而且使用很方便，可以实现一定的定时功能，但最小计时精度仅为55ms，且定时器消息在多任务操作系统中的优先级很低，不能得到及时响应，往往不能满足实时控制环境下的应用。不过Microsoft公司在Win32 API函数库中已经为用户提供了一组用于高精度计时的底层函数，如果用户使用得当，计时精度可到1ms。这个计时精度、对于一般的实时系统控制完全可以满足要求。现将由C＋＋ Builder 4.0提供的重新封装后的一组与时间相关的主要接口函数（函数名、参数、功能与Win32 API基本相同）说明如下： -visual development tools such as Visual C++, Delphi, C++ Builder and others all have dedicated Timer timer control, but it is convenient. can achieve a timing function, but only the minimum time of 55 ms accuracy. Timer news and multi-task operating system in the low priority that is not to respond in a timely manner, often fail to meet the real-time control environment applications. However, Microsoft Corporation in the Win32 API function has been to provide the user with a group for high-precision the bottom was a time function, if the user is properly utilized, time accuracy can be a ms. Accuracy this time, and for most of the real-time control system can meet the requirements.