針對傳統集成電路（ASIC）功能固定、升級困難等缺點，利用FPGA實現了擴頻通信芯片STEL-2000A的核心功能。使用ISE提供的DDS IP核實現NCO模塊，在下變頻模塊調用了硬核乘法器并引入CIC濾波器進行低通濾波，給出了DQPSK解調的原理和實現方法，推導出一種簡便的引入?仔/4固定相移的實現方法。采用模塊化的設計方法使用VHDL語言編寫出源程序，在Virtex-II Pro 開發板上成功實現了整個系統。測試結果表明該系統正確實現了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.
上傳時間： 2013-11-19
上傳用戶：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
標簽： Transceiver Virtex Wizar GTP
上傳時間： 2013-10-20
上傳用戶：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
上傳時間： 2013-12-10
上傳用戶：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. 滾動顯示位圖 在VC++環境下，在一個對話框中顯示一個原始尺寸的大小的位圖文件相當是困難的。然而,通過使用 StretchBlt()函數一個給定的區域顯示一個大的位圖是可能的。主要的缺點是圖像將會失真。看了這篇通過卷動技術顯示整個位圖技術的文章，你將能夠以它的原始尺寸在給定對話框的區域內顯示一個大位圖。 來源: http://www.codeguru.com/bitmap/ScrollBitmap.html
標簽： Displaying difficult original bitmap
上傳時間： 2014-01-05
上傳用戶：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
標簽： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上傳時間： 2014-10-28
上傳用戶：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
標簽： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上傳時間： 2015-02-11
上傳用戶：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
標簽： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上傳時間： 2013-12-27
上傳用戶：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.
標簽： direction the Rotates Degrees
上傳時間： 2013-12-10
上傳用戶：sardinescn
一些基于matlab/simulink的模型，以及s-function實現的網絡控制系統模型，其中計算機、網絡部分采用truetime模塊！
上傳時間： 2014-01-08
上傳用戶：小寶愛考拉
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.
標簽： interpolates polynomial the interval
上傳時間： 2015-04-06
上傳用戶：hakim
