<button id="kagoy"></button> 為了提高超高頻RFID系統(tǒng)中閱讀器在低信噪比的情況下仍具有較高的識別能力,提出一種基于FPGA系統(tǒng)結合軟件無線電方法實現超高頻RFID射頻前端電路方案。超高頻射頻識別系統(tǒng)必須符合EPC Class 1generation 2標準,所設計的電路系統(tǒng)以Xilinx公司的XC6SLX16-2CSG324FPGA芯片為硬件基礎,將數字基帶調制解調和中頻濾波電路在FPGA系統(tǒng)中設計實現,重點闡述了射頻前端電路的設計結構、AD/DA轉換電路,以及數字濾波器的設計。實驗結果表明,所設計的超高頻RFID閱讀器簡化了前端電路系統(tǒng)結構,提升了穩(wěn)定性,增強了抗干擾能力。該電路系統(tǒng)在信噪比較低的情況下,能夠較好地實現915MHz頻率的射頻接收和發(fā)送。In order to improve the reader UHF RFID system still has a higher ability to identify,in the case of low signal-to-noise ratio.The UHF RFID systems must comply with EPC Class 1 generation 2 standard.In this paper,the design of the circuit system based on Xilinx＇s XC6SLX16-2CSG324 FPGA chip,and presents UHF RFID RF front-end circuit with software radio based on FPGA system.Digital baseband modem and IF filter circuit is designed and implemented in the FPGA system,and focused on designing the structure of the RF front-end circuit,AD/DA conversion circuits,and digital filter.Experimental results show that the UHF RFID reader de...
標簽： 915mhz 超高頻 rfid 閱讀 射頻 前端 電路 設計
上傳時間： 2022-04-17
上傳用戶：shjgzh
Vivado設計分為Project Mode和Non-project Mode兩種模式，一般簡單設計中，我們常用的是Project Mode。在本手冊中，我們將以一個簡單的實驗案例，一步一步的完成Vivado的整個設計流程一、新建工程1、打開Vivado 2013.4開發(fā)工具，可通過桌面快捷方式或開始菜單中xilinx DesignTools-Vivado 2013.4下的Vivado 2013.4打開軟件，開啟后，軟件如下所示：2、單擊上述界面中Create New Project圖標，彈出新建工程向導，點擊Next.3、輸入工程名稱、選擇工程存儲路徑，并勾選Create project subdirectory選項，為工程在指定存儲路徑下建立獨立的文件夾。設置完成后，點擊Next注意：工程名稱和存儲路徑中不能出現中文和空格，建議工程名稱以字母、數字、下劃線來組成。4、選擇RTL Project一項，并勾選Do not specifty sources at this time，勾選該選項是為了跳過在新建工程的過程中添加設計源文件。點擊Next.IA5、根據使用的FPGA開發(fā)平臺，選擇對應的FPGA目標器件。（在本手冊中，以xilinx官方開發(fā)板KC705為例，Nexys4開發(fā)板請選擇Artix-7 XC7A100TCSG324-2的器件，即Family和Subfamily均為Artix-7，封裝形式（Package）為cSG324，速度等級（Speed grade）為-1，溫度等級（Temp Grade）為C）。點擊Next6、確認相關信息與設計所用的的FPGA器件信息是否一致，一致請點擊Finish，不一致，請返回上一步修改。二、設計文件輸入1、如下圖所示，點擊Flow Navigator下的Project Manager->Add Sources或中間Sources中的對話框打開設計文件導入添加對話框。2、選擇第二項Add or Create Design Sources，用來添加或新建Verilog或VHDL源文件，點擊Next
標簽： vivado
上傳時間： 2022-05-28
上傳用戶：默默
關于Xilinx IS（14.2）簡單使用方法介紹安裝ISE軟件基本上是一路點擊鼠標就是，但必須安裝注冊表文件，可在網上查找，可能是一個生成注冊表文件或注冊表文件（license），功能仿真是在設計輸入后進行；時序仿真是在邏輯綜合后或布局布線后進行。（系統(tǒng)差不多占20GB硬盤）1創(chuàng)建工程文件（New Projiect）File New Projiect。如輸入文件名：Two20ne.在上圖點擊Next鍵，彈出如下窗口，設置一些參數，如下圖所示：創(chuàng)建資源文件（New Source）ProjectNew Source。如輸入文件名：One2Two.選擇模型，如Verilog Module，輸入HDL語言，或輸入原理圖。或Project>Add Source，，增加已存在的資源文件（*v）。實例：二選一電路。點擊Next鍵，彈出如下窗口，
上傳時間： 2022-06-18
上傳用戶：shjgzh
安裝軟件到ST的網站上下載最新版本的STM32CubeMX 軟件：編寫這份文檔的時候最新版本是V4.17.0 將下載后的壓縮包解壓，雙擊里面的SetupSTM32CubeMX-4.17.0.exe 文件來安裝軟件， 出現下圖的界面的時候按Next 按鈕繼續(xù)：在下面的窗口中選擇“ I accept the terms of this license agreement ”然后繼續(xù)按Next 按鈕。2下一個出現的窗口是選擇軟件安裝的路徑， 默認安裝路徑是C:\Program Files(x86)\STMicroelectronics\STM32Cube\STM32CubeMX ，可以根據實際需要選擇別的路徑，本次安裝在D 盤相同的路徑上。按Next 按鈕后彈出一個確認窗口，按確定鍵確定。接著彈出下圖的配置窗口，按原來默認的配置，按Next 鍵繼續(xù)。3安裝完后，按Next 鍵繼續(xù)。按Done 鍵關閉下面的窗口，完成所有的安裝。4安裝固件包點擊桌面上的STM32CubeMX 圖標運行軟件。先修改軟件包的安裝路徑，點擊help 菜單選“ Updater Settings”選項。軟件包默認安裝在C:/Users/XIN/STM32Cube/Repository/ 目錄下，STM32Cube 軟件包比較大可以點擊Browse 按鍵修改安裝的路徑。修改完軟件包的安裝路徑后開始安裝 STM32Cube軟件包，點擊 help 菜單選 “Insta lnl ewsoftware and/or firmware packages ”選項。
標簽： stm32cubemx
上傳時間： 2022-06-19
上傳用戶：jason_vip1
In this presentation, we will look at what the Serial Peripheral Interface, otherwise known as the SPI, is. and how it is used to communicate data to and from the PICmicro microcontroller.SPl is frequently used when few 1/O lines are available, but communication between two or more devices must be fast and easy to implement.In this presentation, we will discuss the following topics: We will first cover an Overview of SPI This section of the tutorial will introduce you to SPI and its concepts.Next, we will examine the use of SPI on the PICmicro MCU.The details of how SPI is implemented on a PICmicro device will be examined.Then, a Code Walkthrough will be given.The walkthough will explore code for both an SPI Master and SPI Slave. The example will have the Master generate data for sending to the slave.Finally, there will be a few resources given at the end of the presentation. These resources will allow you to explore in more detail the SPI interface
標簽： spi協(xié)議
上傳時間： 2022-06-20
上傳用戶：
Introduction The Sil9135/Sil9135A HDMI Receiver with Enhanced Audio and Deep Color Outputs is a second-generation dual-input High Definition Multimedia Interface(HDMI)receiver. It is software-compatible with the Sil9133receiver, but adds audio support for DTS-HD and Dolby TrueHD. Digital televisions that can display 10-or 12-bit color depth can now provide the highest quality protected digital audio and video over a single cable. The Sil9135and Sil9135A devices, which are functionally identical, can receive Deep Color video up to 12-bit,1080p @60Hz. Backward compatibility with the DVI 1.0specification allows HDMI systems to connect to existing DVI 1.0 hosts, such as HD set-top boxes and PCs. Silicon Image HDMI receivers use the latest generation Transition Minimized Differential Signaling(TMDS) core technology that runs at 25-225 MHz.The chip comes pre-programmed with High-bandwidth?
上傳時間： 2022-06-25
上傳用戶：
1.1首先安裝J-Link驅動>開發(fā)軟件\Setup_JLinkARM_V468，雙擊要安裝的“Setup JLinkARMV468.exe"，>安裝過程全選“next”直到安裝成功，>將JLINK插接到電腦的USB口，即可在我的電腦\管理\設備管理器\通用串行總線控制器中看到一個J-Link driver。舵機是一種位置（角度）伺服的驅動器，適用于需要角度不斷變化并可以保持的控制系統(tǒng)。舵機是一種俗稱，其實是一種伺服馬達。控制信號由接收機的通道進入信號調制芯片，獲得直流偏置電壓。內部有一個基準電路，產生周期為20ms，寬度為1.5ms的基準信號，將獲得的直流偏置電壓與電位器的電壓比較，獲得電壓差輸出。電壓差的正負輸出到電機驅動芯片決定電機的正反轉。當電機轉速一定時，通過級聯減速齒輪帶動電位器旋轉，使得電壓差為0，電機停止轉動。
上傳時間： 2022-07-05
上傳用戶：
PrefaceDuring the past years, there has been a quickly rising interest in radio access technologies for providingmobile as well as nomadic and fixed services for voice, video, and data. The difference indesign, implementation, and use between telecom and datacom technologies is also becoming moreblurred. One example is cellular technologies from the telecom world being used for broadband dataand wireless LAN from the datacom world being used for voice-over IP.Today, the most widespread radio access technology for mobile communication is digital cellular,with the number of users passing 5 billion by 2010, which is more than half of the world’s population.It has emerged from early deployments of an expensive voice service for a few car-borne users,to today’s widespread use of mobile-communication devices that provide a range of mobile servicesand often include camera, MP3 player, and PDA functions. With this widespread use and increasinginterest in mobile communication, a continuing evolution ahead is foreseen.This book describes LTE, developed in 3GPP (Third Generation Partnership Project) and providingtrue 4G broadband mobile access, starting from the first version in release 8 and through the continuingevolution to release 10, the latest version of LTE. Release 10, also known as LTE-Advanced,is of particular interest as it is the major technology approved by the ITU as fulfilling the IMTAdvancedrequirements. The description in this book is based on LTE release 10 and thus provides acomplete description of the LTE-Advanced radio access from the bottom up.Chapter 1 gives the background to LTE and its evolution, looking also at the different standardsbodies and organizations involved in the process of defining 4G. It also gives a discussion of the reasonsand driving forces behind the evolution.Chapters 2–6 provide a deeper insight into some of the technologies that are part of LTE and itsevolution. Because of its generic nature, these chapters can be used as a background not only for LTEas described in this book, but also for readers who want to understand the technology behind othersystems, such as WCDMA/HSPA, WiMAX, and CDMA2000.Chapters 7–17 constitute the main part of the book. As a start, an introductory technical overviewof LTE is given, where the most important technology components are introduced based onthe generic technologies described in previous chapters. The following chapters provide a detaileddescription of the protocol structure, the downlink and uplink transmission schemes, and the associatedmechanisms for scheduling, retransmission and interference handling. Broadcast operation andrelaying are also described. This is followed by a discussion of the spectrum flexibility and the associated
上傳時間： 2022-07-08
上傳用戶：
第一步：安裝DFP軟件包（1）按照Keil uVision5，步驟略。我的keil版本如下：uVision V5.21.1.0Copyright(C)2016 ARM Ltd and ARM Germany GmbH. All rights reserved.（2）下載GD3210X的DFP軟件包。下載地址：（3）安裝DFP軟件包。雙擊pack文件進行安裝，如下圖所示：點擊next，將包文件復制到上面的路徑位置。如下圖：GigaDevice文件夾就是安裝好的軟件包。第二步：創(chuàng)建Keil工程（1）通常要新建3個文件夾。如下圖所示：（2）打開keil5，新建project.將工程文件放到Mdk-Arm目錄下面。彈出器件選擇界面：在Device 下拉框，選擇Software Packs，選擇GD32F103RB點擊OK
上傳時間： 2022-07-23
上傳用戶：
VIP專區(qū)-嵌入式/單片機編程源碼精選合集系列（104）資源包含以下內容：1. mips命令集詳解.2. 數碼相框原理圖,ZXDP-010 (8302+720).3. CBM2090單片8BIT 16BIT共板原理圖.4. 紅外線遙控是目前使用最廣泛的一種通信和遙控手段。由于紅外線遙控裝置具有體積小、功耗低、功能強、成本低等特點.5. 時間觸發(fā)嵌入式系統(tǒng)設計模式 使用8051系列微控制器開發(fā)可靠應用.6. 關于555時基電路原理以及應用的介紹說明.7. 一個關于s3c2410_LCD_640*480的驅動程序.8. ipod——touch攻略.9. SDMMC 源碼 SD、MMC卡的讀寫程序.10. 嵌入式試驗開發(fā)平臺簡介.11. Mobile phone MMI design reference..12. 我寫的stv2248 芯片的驅動程序.13. 應用于S60平臺的示例程序.14. YAFFS (Yet Another Flash File System) is now in its second generation and provides a fast robust fil.15. 關于h264的演示 內容不錯 希望大家喜歡..16. Michael Barr是Netrino公司的總裁兼創(chuàng)始人.17. 2006年軟考的嵌入式系統(tǒng)設計師考試題及答案.18. S3C2440開發(fā)板原理圖以及成品圖片.是硬件開發(fā)工程師的好參考資料.19. 一個可以實現嵌入式視頻監(jiān)控系統(tǒng)的服務器軟件。.20. 一個可以實現嵌入式視頻監(jiān)控系統(tǒng)的最新版客戶端軟件。.21. 東軟嵌入式高級C培訓(2007)).22. 最新的uffs,目前是1.1.2版本.23. NokiaSeries40Book1,介紹了40平臺的手機開發(fā).24. 數控編程開發(fā)事例,對數控機床的直線和圓戶進行插補,.25. 用STR710控制串口及CC1100進行無線通信.26. 非常不錯的單片機開發(fā)板原理圖.27. s3c44b0bootloader分析.28. 以 DSpic30f4011為 SPI SLAVE的范例程式.29. 漢字與字符顯示函數。對于任一主函數.30. 最詳細最專業(yè)的MODBus協(xié)議介紹。 給MODBus總線開發(fā)的朋友們一些參考！.31. 本文較為詳細的介紹了雙CPU的C51系統(tǒng)設計中.32. c51的時鐘芯片讀寫函數.33. 本書介紹了PCI局部總線的基本概念,功能,操作規(guī)則和使用方法.34. Intel公司的閃存轉換層(Flash Translaion Layer)規(guī)范指導文件.35. h.261 player with running h.261,p24,h26 file.36. I2C接口協(xié)議.37. First of all we would like to thank God Almighty for giving us the strength and confidence in pursi.38. 2008年最新出版Silverlight及Blend學習電子書教程合集.39. 利用VB與VC程式整合開發(fā)實現影像物體分類辨識的PLC輸送帶系統(tǒng).40. 凌陽公司機sunplus1002在這個芯片下.
標簽： 光電子
上傳時間： 2013-06-25
上傳用戶：eeworm
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