一 本压缩包说明： 包含两个文件夹，一个word文档，和本使用说明文本文档。 其中： 文件夹 PCI9054为驱动程序的完整代码（有注释）以及类DOS应用程序。 文件夹 PCI9054应用程序（VC）是用VC开发的对应的应用程序，包括指示读写时间和显示读写数据。 WORD文档 是使用DriverWorks向导生成程序框架的过程 程序通过DriverWorks实现对PCI9054 BAR0，BAR2的数据写入，读出。读写方式是DIRECT IO方式。值得一提的是，采用该方式所能达到的读写数据速度只有几M。另外，程序中没有加入中断控制等操作。这些我会在今后不断得完善
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上传时间： 2014-01-06
上传用户：xaijhqx
We simulate uncoded BER of BPSK modulated data as a function of SNR -in an AWGN channel -in a Rayleigh fading channel -in an AWGN channel when DIRECT sequence spreading is used and compare results to the theoretical ones. We assume coherent receiver and perfect synchronization.
标签： modulated simulate function channel
上传时间： 2014-01-11
上传用户：1109003457
SPREAD SPECTRUM MODULATION TECHNIQUES -spread spectrum - those modulation methods that are producing a signal whose spectrum is more wider than of the data signal, the occupied frequency band being independent by the signal of data band. -The signals with spread spectrum of DIRECT sequence type BPSK (BPSK-DS-SS) -The signals with spread spectrum of DIRECT sequence type QPSK – DS–SS - Frequency hopping spread spectrum signals (FH-SS)
标签： MODULATION TECHNIQUES modulation SPECTRUM
上传时间： 2017-06-05
上传用户：lht618
This example program is the source code for the FT232BM Test Application from our Utilities page. It can be used to test the handshaking lines on FT232BM based RS232/RS485/RS422 designs. This program can also be used for programming the external EEPROM over USB in a manufacturing environment. The test features require the test cable shown on ST_232_245.pdf to be connected. Our D2XX DIRECT drivers should be installed for this application. The code can be modified to fit your requirements. To download the application source code , click here. To download the test cable specification, click here.
标签： Application Utilities the example
上传时间： 2013-12-09
上传用户：aa17807091
this code is a implementation of the Discrete cosinuss transformation. In this code I have used the DIRECT méthode of calcul by used the equation without used the maatrix multiplication.
标签： this code implementation transformation
上传时间： 2013-12-19
上传用户：lanwei
Universal.Data.Access.Components 2.50 Universal Data Access Components (UniDAC) is a library of components that provides DIRECT access to most popular database servers from Delphi, Delphi for .NET and, C++Builder. UniDAC can work with such servers as Oracle, Microsoft SQL Server, MySQL, Interbase, Firebird. The UniDAC library is designed to help programmers develop faster and cleaner cross-database applications. UniDAC is a complete replacement for such standard universal technology as dbExpress. UniDAC is a handy in use and efficient data access solution bringing into play many features specific to each server.
标签： Components Universal Access Data
上传时间： 2017-07-04
上传用户：123456wh
模拟器提供了一个简单易用的平台，实施application-layer/P2P协议和测试的大型网络。在此，已经实现三个应用层组播协议仿真： Sequence of DIRECT unicasts Narada NICE
标签： 模拟
上传时间： 2013-12-17
上传用户：gaojiao1999
数字控制振荡器（NCO，numerical controlled oscillator）是软件无线电、直接数据频 率合成器（DDS，DIRECT digital synthesizer）、快速傅立叶变换（FFT，Fast Fourier Transform） 等的重要组成部分，同时也是决定其性能的主要因素之一，随着芯片集成度的提高、在信号 处理、数字通信领域、调制解调、变频调速、制导控制、电力电子等方面得到越来越广泛的 应用。
上传时间： 2017-07-15
上传用户：nanshan
In 揚erformance of multi-carrier DS CDMA Systems?we apply a multi-carrier signaling technique to a DIRECT-sequence CDMA system, where a data sequence multiplied by a spreading sequence modulates multiple carriers, rather than a single carrier. The receiver provides a correlator for each carrier, and the outputs of the correlators are combined with a maximal-ratio combiner. This type of signaling has the desirable properties of exhibiting a narrowband interference suppression effect, along with robustness to fading, without requiring the use of either an explicit RAKE structure or an interference suppression filter.
标签： multi-carrier erformance signaling technique
上传时间： 2017-07-31
上传用户：宋桃子
本系统分电压测量和信号产生输出两大部分，电压测量部分以模拟电路为主，配合放大模块、A/D转化模块、显示模块；通过凌阳单片机进行数据处理，在误差允许范围内显示测量电压值。信号产生以直接数字式频率合成器(DIRECT Digital Frequency Synthesis,简称DDS或DDFS)为核心，经过AT89S52对DDS芯片内部进行控制，使之输出标准正弦波形，利用编程实现频率预置、步进，达到电压输出频率的可调节步进。通过调试与测量完成了题目的基本部分和全部发挥部分的要求并有自己的创新
上传时间： 2017-08-08
上传用户：comua
