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
The LogiCORE™ GTP Wizard automates the task of creating HDL wrappers to configure the high-speed serial GTP transceivers in Virtex™-5 LXT and SXT devices. The menu-driven interface allows one or more GTP transceivers to be configured using pre-definedtemplates for popular industry standards, or from scratch, to support a wide variety of custom protocols.The Wizard produces a wrapper, an example design, and a testbench for rapid integration and verification of the serial interface with your custom function Features• Creates customized HDL wrappers to configureVirtex-5 RocketIO™ GTP transceivers• Users can configure Virtex-5 GTP transceivers toconform to industry standard protocols usingpredefined templates, or tailor the templates forcustom protocols• Included protocol templates provide support for thefollowing specifications: Aurora, CPRI, FibreChannel 1x, Gigabit Ethernet, HD-SDI, OBSAI,OC3, OC12, OC48, PCI Express® (PCIe®), SATA,SATA II, and XAUI• Automatically configures analog settings• Each custom wrapper includes example design, testbench; and both implementation and simulation scripts
标签： Transceiver Virtex Wizar GTP
上传时间： 2013-10-20
上传用户：dave520l
|Introduction Basic Concept Tips to layout Power circuit Type of Power circuit Basic Concept Maximum Current calculation Resistance of Copper ideal power supply & noise Capacitor & Inductor Power consumption function of power circuit
上传时间： 2013-12-10
上传用户：JIEWENYU
Displaying a large bitmap file on a dialog box, in its original size, is quite difficult in the VC++ environment. However, it is possible to display a large bitmap to a predefined area of the dialog by using the StretchBlt( ) function.The major disadvantage of this is that the clarity of the image will be lost. Check out this article for displaying large bitmaps into the desired area of your dialog box in its original size with a scrolling technique used to show the entire bitmap. 滚动显示位图 在VC++环境下，在一个对话框中显示一个原始尺寸的大小的位图文件相当是困难的。然而,通过使用 StretchBlt()函数一个给定的区域显示一个大的位图是可能的。主要的缺点是图像将会失真。看了这篇通过卷动技术显示整个位图技术的文章，你将能够以它的原始尺寸在给定对话框的区域内显示一个大位图。 来源: http://www.codeguru.com/bitmap/ScrollBitmap.html
标签： Displaying difficult original bitmap
上传时间： 2014-01-05
上传用户：yiwen213
ECHNICAL COMMITTEE No. 65: INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL WORKING GROUP 6 VOTING DRAFT - PUBLICLY AVAILABLE SPECIFICATION - function BLOCKS FOR INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL SYSTEMS
标签： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上传时间： 2014-10-28
上传用户：源弋弋
ECHNICAL COMMITTEE No. 65: INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL WORKING GROUP 6 VOTING DRAFT - PUBLICLY AVAILABLE SPECIFICATION - function BLOCKS FOR INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL SYSTEMS
标签： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上传时间： 2015-02-11
上传用户：baiom
ECHNICAL COMMITTEE No. 65: INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL WORKING GROUP 6 VOTING DRAFT - PUBLICLY AVAILABLE SPECIFICATION - function BLOCKS FOR INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL SYSTEMS
标签： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上传时间： 2013-12-27
上传用户：frank1234
Rotates an image by the angle degrees in the % CCW direction. Degrees may be any number. % The function will put degrees in the range 0 % to 360 degrees and then into a range of -45 to 45 % degrees after performing elementary 90 degree rotations.
标签： direction the Rotates Degrees
上传时间： 2013-12-10
上传用户：sardinescn
一些基于matlab/simulink的模型，以及s-function实现的网络控制系统模型，其中计算机、网络部分采用truetime模块！
上传时间： 2014-01-08
上传用户：小宝爱考拉
Finds the polynomial p10 of degree less than or equal to 10 that interpolates cos x on the interval [0, PI/2] at 11 equally spaced points. Study the error betwee between the function and the polynomial at 41 equally spaced points over the same interval. Repeat the latter but use your 11 points to be Chebyshevs.
标签： interpolates polynomial the interval
上传时间： 2015-04-06
上传用户：hakim
