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Description: Analysis and simulation of RFID UHF
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Size: 86016 |
Author: vladi |
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Description: 该模型是基于实地测量的即以准平坦地形、大城市市区的中值场强或路径损耗作为参考，对其他传播环境和地形条件等因素分别以校正因子的形式进行修正，用来预测地面移动系统信号的强度。其频率适用范围是150MHz到1000MHz的UHF/VHF频带。目前使用的主要频段资源为800~900MHz。这一频段，在相对平坦区域，一般可应用Okumura-Hata传播模型。Hata提供了对这些数据的解析逼近，并捕捉到大部分的主要影响-The model is based on field measurements of the quasi-flat terrain, large cities in the urban field strength or path loss values as a reference for other dissemination of environmental and topographic conditions and other factors correction factor respectively in the form of amendments to be used to predict the ground mobile systems the signal strength. The frequency range is 150MHz to 1000MHz for the UHF/VHF band. The main bands currently used resources for the 800 ~ 900MHz. The band, in the relatively flat areas, generally can be applied to Okumura-Hata propagation model. Hata provides these data analytic approaches, and to capture most of the major impact
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Size: 23408640 |
Author: gudeyi |
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Description: 超高频RFID读写器研究与设计
本课题以超高频RFID读写器硬件实现为主要本文设计RFID读写器硬件基带和射频部分的参数都可以满足要求，读写器可
以正常读、写符合15015000一6C或者 EpCglobalClasslGenZ协议的电子标签，
其上传速率可以达到640kbPs，配合上层的软件设计可以实现读写器考勤功能，经
过测试验证本系统可以长时间地稳定工作。
-UHF RFID reader research and design of this issue using the UHF RFID reader hardware designed in this paper as the main RFID reader hardware, baseband and RF part of the parameters are to meet the requirements of a normal reader can read, 15.015 million was in line with the agreement of a 6C or EpCglobalClasslGenZ electronic tags, its upload speeds can reach 640kbPs, with the top of the software design can be achieved reader attendance functionality, the system can be tested and verified for a long time stable jobs.
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Size: 5537792 |
Author: wupiao |
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Description: 文章讲述了现在韩国的频谱政策和动态频谱接入技术。过去韩国的频谱管理政策需要特权，并且只有一小部分频谱可以公用。随着无线技术的发展，现在，韩国政府，使用了机遇动态频谱接入的新型频谱策略，例如LBT技术用于REID，UWB和FACS等。MIC还考虑如何在DTV过渡完成后，重新分配频谱。新型的无线电技术如认知无线电和SDR将在UHF边带中应用新的服务。MIC试图用一用有效地方式开放频谱并接受新技术用于频谱策略中。-In this paper, we introduce spectrum policies and
dynamic spectrum access technologies in Korea. In the past,
Korea spectrum management was the command and control with
exclusive usage rights and small portions of spectrum commons
bands. With the development of the radio technologies, Recently,
Korea government, MIC(ministry of information and com-
munication), has been adopting new spectrum policies based on
dynamic spectrum access technology such as LBT(Listen Before
Talk) for RFID, UWB, and FACS(Flexible Access Common
Spectrum) etc. MIC is also considering spectrum reallocation of
digital dividend bands after DTV transition. New radio
techniques such as cognitive radio and SDR will be applied to
new services in this UHF band. MIC is trying to open the radio
spectrum in an efficient way and adopt new technology into
spectrum policy. Thus MIC is extending the open spectrum such
as spectrum commons and spectrum liberalization bands.
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Size: 681984 |
Author: will |
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Description: 本文结合超高频RFID读写器的发展趋势，提出了一种基于EPC Gen2标准的
915MHz超高频RFID读写器设计，并完成了系统测试。涉及的主要工作有：
1．分析了EPC Gen2标准的技术特点和各项指标，研究了UHF RFID读写器的
系统原理和基本结构，详细探讨了整个系统通信链路的传播特点。
2．分析了读写器射频电路。MCU采用单片机C8051F340，射频芯片采用奥地利
微电子的高集成度UHF RFID读写芯片AS3991。完成了硬件电路的搭建和测
试。
3．设计了读写器的软件控制程序。软件程序采用C语言编写。参照EPC Gen2
标准的各项指标，完成了对各个功能模块的仿真测试。-1．Deeply analysizes the EPC Gen2 standard technical characteristics，studys the
principles and basic structure of UHF RFID reader system，discusses the entire system
communication link propagation in detail．
III
中山人学硕．1：学位论文
2．Analysizes and designs the hardware circuits of the reader．MCU uses C805 1 t340 and
the RF chip uses AS3991．Completes the welding and the testing ofhardware circuits．
3．Designes the software control program．Software program uses C language．Referring
to EPC Gen2 standard，completes the simulation testing of different functional
modules of the reader．
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Size: 4340736 |
Author: HY jian |
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Description: Demo Speed通信协议MATLAB实现。基于动态帧时隙ALOHA(DFSA)协议与正交可变扩频因子码(OVSF)作为扩频码的码分多址技术相结合的超高频RFID系统-Demo Speed Communication Protocol MATLAB. (DFSA) agreement with orthogonal variable spreading factor code (OVSF) UHF RFID system based on dynamic frame slot ALOHA CDMA technology spreading codes as a combination of
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Size: 90112 |
Author: 李世民 |
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Description: This code is not part of the RITSAR toolset. This code has essentially been copied Mehrdad Soumekh s spotlight processing algorithm, which is written in MATLAB, and has been translated to Python. Also provided are copies of this code with parameters modified to match those given in the Carrera text for both the x-band and UHF scenarios. The x-band file will likely give memory errors. A short description as to why is given in the header for that code.
-This code is not part of the RITSAR toolset. This code has essentially been copied Mehrdad Soumekh s spotlight processing algorithm, which is written in MATLAB, and has been translated to Python. Also provided are copies of this code with parameters modified to match those given in the Carrera text for both the x-band and UHF scenarios. The x-band file will likely give memory errors. A short description as to why is given in the header for that code.
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Size: 5120 |
Author: mojtaba |
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