XMLSPY,xml基础教程

modbus协议全解，modicon公司编写的协议，很权威，很有参考价值。-modbus protocol the whole solution, modicon the company prepared an agreement, it is authoritative, useful reference value.

SYMPCHUNK sets the number of symbols demodulated at once with a constant carrier frequency and symbol timing offset. This is a fundamental decoder parameter that establishes its carrier and symbol timing tracking bandwidth. Set it too low and the demodulator can"t accurately determine carrier frequency and symbol timing on a noisy signal. Set it too high and the demodulator may not be able to track large symbol rate offsets caused by Doppler shift and/or A/D or spacecraft clock errors. Or it might have trouble tracking high rates of change in the carrier frequency due to Doppler acceleration.The current value of SYMPCHUNK is 4*N1 = 512, where N1 = 128 is the order of the convolutional interleaver. 512 symbols is 512 milliseconds at 1000 symbols/sec, giving a frequency/time determination SNR that is 10*log10(512) = 27 dB greater than the Es/N0, not counti

无线应用协议（Wireless Application Protocol，WA P）是WA P论坛经过不断努力得到的成 果，它提供了一个业界技术规范，以便开发出适用于各种无线通信网络的应用和业务。WA P 论坛的工作范围就是为各种业务和应用制定一系列的技术规范。无线市场正在快速增长，新 的用户不断增多，新的业务不断涌现。为了使运营商和生产者能够从容面对先进业务、多种 类业务和快速、灵活的业务生成等诸多的挑战， WA P规定了一系列传输层、会话层和应用层 协议。-Wireless Application Protocol (Wireless Application Protocol. WA P) P Forum WA is a result of efforts the results, it provides an industry technical standards, developed to apply to all kinds of wireless communication networks and business applications. WA P scope of the work of the Forum is for various business applications and formulated a series of technical standards. Wireless market is growing rapidly, new users are increasing and new business continued to emerge. To enable operators and producers to calmly face the advanced business, and more types of business fast, flexible service creation and many other challenges, WA P provides a series of transport layer, session layer and application layer protocol.

MYICQ为一款C/S架构即时通信软件，本代码包含完整的客户端和服务端源代码，MyICQ-0.8-alpha1源码，包含完整工程文件，代码完整，可以直接编译通过

在网上找了一个月了关于USb hid与PC通信的上位机的资料，有的不全或者有的缺点东西，好不容易找个一个源码，非常使用，特拿出来分享。 #include "stdafx.h" #include "HIDUSB.h" #include "MainFrm.h" #include "HIDUSBDoc.h" #include "HIDUSBView.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // CHIDUSBApp 请点击左侧文件开始预览 ！预览只提供20%的代码片段，完整代码需下载后查看 加载中 侵权举报

2ASK的调制与解调及其功率谱的接收-2ASK modulation and demodulation and the power spectrum receiver

模板代码 实现UDP发送接收以及作为服务器网络编程等重要功能-Template code to send UDP server to receive network programming, as well as other important functions

NS2中的模拟场景脚本自动生成工具，非常方便-NS2 scenes in the script automatically generates simulation tool, a very convenient

第 3 部分卫星通信的基本原理在卫星通信中采用的调制技术1.早期的通信2.同时传输多个信号3.调制类型4.数字调制的量化数据5.数字调制技术 — — CW （常数振幅）6.正交幅度调制 （QAM）7.恢复数据包错误8.振幅和相移键控 （APSK）9.数字调制-决定区域

一个用于双机通信的实例-for a two-machine communications examples