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通信原理的经典讲义，日本东北大学安达幸信教授来华讲义-Communication Theory of classic lectures, Koji Tohoku University Professor Anderson notes here

这个也是关于空间谱的matlab 挺好的 可以-This is on the spatial spectrum of matlab can be quite good

数字调制技术一套的基础功能选择特定的调制方案。一般的基础功能是互相正交的。可以使用 "克施密特正交化" 过程派生的基础功能。一旦选择了基础功能，任何信号空间中的向量可以表示为基函数的线性组合。 在正交相移键控 （QPSK） 两个正弦波 (sin 和 cos） 作为基函数调制的。调制被通过不同相的基础功能，根据消息符号。在 QPSK，调制是基础，在那里有一个符号包含 2 位的象征。

通信系统仿真原理与无线应用代码 是一本不可多得的仿真书籍 -Communication System Simulation Principle and wireless application code is a simulation of rare books

windows ce下的串口通信程序,大家参考-good

域名系统安全（PKI）签名机构

西门子S7-300和S7-400的梯形图编程手册,供需要的人参考-Siemens S7-300 and S7-400 of the ladder programming manual for those who need it for reference

Async Professional 3这个工具包包罗万象：你在DELPHI和C Builder下编写通讯程序的一切。从简单的通讯到发送传真、寻呼以及INTERNET应用，只有Async Professional将所有通讯功能集中一起而又价格公道。Async Professional 3建立于TurboPower早期获得大奖的通讯库，并加入了你所需要的功能。一些强大的新功能包括数字寻呼（甚至基于INTERNET），FTP文件传输，RAS拨号自动脚本，新的高级VT100终端，FAX服务器控件以及其它等等。试用版（只有IDE运行时才工作）。-Async Professional 3 of the tool kit all-inclusive: you DELPHI and C Builder prepared with all the communication process. From simple communication to send a fax, paging and INTERNET applications, only Async Professional all communication functions together and at reasonable prices. Async Professional 3 was established in early TurboPower award-winning communications library, and add the features you need. Some powerful new features including digital paging (even based on the INTERNET), FTP file transfer, RAS dial-up automated scripts, the new senior VT100 terminal, FAX server controls, as well as other and so on. Trial version (only run when the work of IDE).

文章介绍了在通信系统中用卷积器实现快速码同步及解调-Introduction article used in the communication system Convolver realize rapid code synchronization and demodulation

一个开发实时数据信号处理的元老级的库函数，intel的，不可多得，难得一见，一见钟情，情难以忍！-A development deal with real-time data signal of the senior class library, intel, and a rare, rare, love at first sight, difficult to tolerate the situation!