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： 2013-11-06
上传用户：liu123
Express Mode uses an 8-bit wide bus path for fast configuration of Xilinx FPGAs. Thisapplication note provides information on how to perform Express configuration specifically forthe Spartan™-XL family. The Express mode signals and their associated timing are defined.The steps of Express configuration are described in DETAIL, followed by DETAILed instructions thatshow how to implement the configuration circui
标签： Spartan-XL Express XAPP FPGA
上传时间： 2015-01-02
上传用户：nanxia
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
介绍了以PLC为控制单元，变频器为执行单元的控制系统及其在烟支输送储存系统中的应用，并给出了系统的组成、硬件的配置及具体的实现方法。关键词 : PLC 变频器输送储存系统 Ab str ac t;T hisp aperi ntroducest hec ontrols ystem whichc onsistso fP LCa ndf requencyc onvertera ndi ts application in the buffer conveyor for cigarettes. The system constitute, hardware disposal and realization method are also presented in DETAIL.Keywords:PLC f requencyc onverter b ufferc onveyor
上传时间： 2013-10-22
上传用户：ouyang426
A document about audio,include Mp3 , Mp3Pro, AAC , AAC+ , EAAC+ , AMR , AMR-WB ,AMR-WB+ .It list DETAIL information about this audio type.It is a guide to study these audio in advance
标签： AMR-WB AAC document include
上传时间： 2015-02-21
上传用户：lizhen9880
The JILRunOnly project is a simple command-line application written in ANSI-C that is intended to demonstrate in DETAIL, how the JILRuntime/JewelScript library can be embedded into an application.
标签： command-line application JILRunOnly intended
上传时间： 2015-04-03
上传用户：ywqaxiwang
红外线遥控器读码软件，显示红外线波型，读取并保存码 IR Remote Control Unit Code Read System 产品详细描述： 能够像显示器一样显示红外线码的波型 可以读多达１５０种格式的红外线码 显示红外线码的时间非常准确，误差只有几个微秒。 具有错误检测功能 保存红外线码功能 自动识别码的格式 比较样机与所写的新软件的遥控器码的异同 具体情况请访问本网站：http://www.crzman.com/IR_Reader.htm Display the Infrared wave on the software like oscillograph. Can read more than 150 kinds of infrared code format Display the Infrared time and the tolerance no more than many us. Have error detect function Save Infrared code function Auto identify code s format Compare the code from sample and new Remote Control Unit code) DETAIL instance please visit address: http://www.crzman.com/IR_Reader.htm
上传时间： 2015-07-03
上传用户：ccclll
Continuous wave radars and pulsed radars are discussed.Resolving range and Doppler mbiguities is also discussed in DETAIL.
标签： radars Continuous mbiguities and
上传时间： 2013-12-19
上传用户：haoxiyizhong
英文版,pdf格式。 详细说明： Title: STL Tutorial and Reference Guide: C++ Programming with the Standard Template Library (2nd Edition) URL: http://www.amazon.com/exec/obidos/tg/DETAIL/-/0201379236/ ISBN: 0201379236 Author: David R. Musser / Gillmer J. Derge / Atul Saini / Gilmer J. Derge Publisher: Addison-Wesley Page: 560 Edition: 2nd edition (March 27, 2001) Catalog: C++ Format: PDF Size: 3.8M Supplier: December Summary: The Standard Template Library was created as the first library of genetic algorithms and data structures, with four ideas in mind: generic programming, abstractness without loss of efficiency, the Von Neumann computation model, and value semantics. This guide provides a tutorial, a description of each element of the library, and sample applications. The expanded second edition includes new code examples and demonstrations of the use of STL in real-world C++ software development it reflects changes made to STL for the final ANSI/ISO C++ language standard.
标签： Programming Reference Standard Tutorial
上传时间： 2015-09-02
上传用户：Breathe0125
The combined demo is dedicated for S1C33L05, so DMT33L05 should be used to load and run the demo. For the DETAIL description of DMT33L05, please refer to S5U1C33L05D1_User_Manual.
标签： demo dedicated combined should
上传时间： 2014-07-05
上传用户：lili123
