This application note shows how a Xilinx CoolRunnerTM-II CPLD can be used as a simplelogical switch that can quickly and reliably select between different MPEG video sources. Thesource code for the design is available on the Xilinx website, and is linked from the “VHDLCode” section. The code can be expanded by the user to perform additional operations usingthe remaining CPLD resources
标签： CoolRunner-II Xilinx XAPP CPLD
上传时间： 2013-12-16
上传用户：qwer0574
针对传统集成电路（ASIC）功能固定、升级困难等缺点，利用FPGA实现了扩频通信芯片STEL-2000A的核心功能。使用ISE提供的DDS IP核实现NCO模块，在下变频模块调用了硬核乘法器并引入CIC滤波器进行低通滤波，给出了DQPSK解调的原理和实现方法，推导出一种简便的引入?仔/4固定相移的实现方法。采用模块化的设计方法使用VHDL语言编写出源程序，在Virtex-II Pro 开发板上成功实现了整个系统。测试结果表明该系统正确实现了STEL-2000A的核心功能。 Abstract: To overcome drawbacks of ASIC such as fixed functionality and upgrade difficulty, FPGA was used to realize the core functions of STEL-2000A. This paper used the DDS IP core provided by ISE to realize the NCO module, called hard core multiplier and implemented CIC filter in the down converter, described the principle and implementation detail of the demodulation of DQPSK, and derived a simple method to introduce a fixed phase shift of ?仔/4. The VHDL source code was designed by modularity method , and the complete system was successfully implemented on Virtex-II Pro development board. Test results indicate that this system successfully realize the core function of the STEL-2000A.
上传时间： 2013-11-19
上传用户：neu_liyan
ACPR (adjacent channel power ratio), AltCPR (alternatechannel power ratio), and noise are important performancemetrics for digital communication systems thatuse, for example, WCDMA (wideband code division multipleaccess) modulation. ACPR and AltCPR are bothmeasures of spectral regrowth. The power in the WCDMAcarrier is measured using a 5MHz measurement bandwidth;see Figure 1. In the case of ACPR, the total powerin a 3.84MHz bandwidth centered at 5MHz (the carrierspacing) away from the center of the outermost carrier ismeasured and compared to the carrier power. The resultis expressed in dBc. For AltCPR, the procedure is thesame, except we center the measurement 10MHz awayfrom the center of the outermost carrier.
上传时间： 2013-11-02
上传用户：maricle
Transfer Files to and from an FTP Server
标签： Transfer Server Files from
上传时间： 2013-12-17
上传用户：jing911003
ComPort Library是一套用来编写串口通讯程序的控件。它包含5个控件：TComPort, TComDataPacket, TComComboBox, TComRadioGroup and TComLed。利用这些工具（当然还有DELPHI开发环境），你能更快更简单地开发串口通讯程序。包含Delphi上下文相关的帮助文件和源代码（4000行）。功能无限制。源代码：包含。适用语言：CB3 CB4 CB5 D3 D4 D5
标签： TComDataPacket TComRadioGroup TComComboBox TComPort
上传时间： 2015-01-05
上传用户：363186
msdos 3.30 source code
上传时间： 2014-01-01
上传用户：youth25
VIGASOCO (VIdeo GAmes SOurce COde) Windows port (v0.01)
标签： VIGASOCO Windows SOurce GAmes
上传时间： 2015-01-06
上传用户：dsgkjgkjg
Linux PCMCIA Card Services - Linux support for PCMCIA and CardBus devices, including kernel services, client drivers, and user-level utilities.
标签： PCMCIA Linux including Services
上传时间： 2014-01-18
上传用户：tyler
CSL is a programming language with C syntax and comprehensive libraries. The compact scripting engine can also be embedded into your own applications as a powerful macro language. Windows Distribution utilities.
标签： comprehensive programming libraries scripting
上传时间： 2013-11-27
上传用户：xuanchangri
Dream Scripter v3.5 Full Source Code
标签： Scripter Source Dream Code
上传时间： 2015-01-08
上传用户：epson850
