WCDMA接口协议中文版，用于详细了解WCDMA接口结构组成及流程

同学录系统是一个用asp.net开发的程序-college system is an Asp. Net with the program

QAM星座图的原理和应用 QAM星座图的原理和应用-QAM constellation diagram of the principle and application of the principle of QAM constellation diagram and applications

GTP信令规定了移动台MS接入GPRS网络的隧道控制和管理协议要求，信令主要执行建立、修改和删除隧道的功能。在用户面，GTP利用GSN之间建立的隧道传送用户数据分组。-GTP signaling provides GPRS mobile station MS network access control and management of the tunnel requirements in the agreement, signaling the main executive to establish, modify and delete functions of the tunnel. In the user plane, GTP using GSN tunnel established between the transmission of user data packet.

直接数字合成(DDS)技术具有信号频率分辨率高、控制灵活、可编程及任意波形输出等优 点-direct digital synthesis (DDS) technology with high resolution signal frequency, flexible control, and programmable arbitrary waveform output advantages

USB On-The-Go Full Speed Host and High Speed Peripheral Controller-USB OTG FS control

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.

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.

一篇详细介绍高速数据调制解调技术，主要以QPSK信号为例，包括解调和定时，挺好的-A detailed introduction of high-speed data modem technology, mainly as an example QPSK signals, including demodulation and timing, very good

手机Modem连接功能支持很多款手机,-phone modem connectivity support many handsets,

In this simulink model , BPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.-In this simulink model , BPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.