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Description: 射频识别技术[Radio Frequency Identification，RFID]是自动识别技术的一种，近几年发展非常迅速。射频识别技术的工作方式是利用射频方式进行非接触双向通信，以达到识别目标对象并交换数据。-RFID [Radio Frequency Identification, RFID] is an automatic identification technology, developed rapidly in recent years. Radio frequency identification technology, working methods are conducted using non-contact radio frequency two-way communication, so as to achieve the target audience identification and exchange of data.
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Size: 1147904 |
Author: 胡利建 |
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Description: RFID, the wireless technology that has helped
millions of people around the world to protect their property and
make their workplaces safer is now in danger of being viewed as a
security risk. Ray Stanton examines the love-hate relationship
between people and Radio Frequency Identification [RFID] tags and
highlights the need for informed debate about the privacy issues the
technology raises.-Sometimes it seems we have a love-hate
relationship with technology, and that’s
certainly the case with RFID.
On the one hand, the tags are just
high-tech barcodes – attached to items
to allow them to be tracked through the
supply chain and make life easier at
supermarket checkouts.
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Size: 106496 |
Author: 胡利建 |
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Description: RFID is an area of automatic identifi cation that is gaining
momentum and is considered by some to emerge as one of
the most pervasive computing technologies in history. In its
simplest form, RFID is a similar concept to bar coding. It is
seen as a means of enhancing data processes and is comple-
mentary to existing technologies. It is a proven technology
that has been in use since the 1970s.-Amore complex description is an electromagnetic proxim-
ity identifi cation and data transaction system. Using ‘‘RFID
tags’’ on objects or assets, and ‘‘readers’’ to gather the tag in-
formation, RFID represents an improvement over bar codes in
terms of non-optical proximity communication, information
density, and two-way communication ability. Operational
RFID systems involve tags and readers interactingwith objects
[assets] and database systems to provide an information and/
or operational function.
RFID is used for a wide variety of applications ranging from
the familiar building access control proximity cards to supply
chain tracking, toll collection, vehicle parking access control,
retail stock management, ski lift access, tracking library
books, theft prevention, vehicle immobiliser systems and rail-
way rolling stock identifi cation and movement tracking.
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Size: 198656 |
Author: 胡利建 |
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Description: 14443 多功能射频卡 例程 里面提多语言的完整例子 -14443 Multi-function radio frequency card routines inside mention a complete multi-language examples
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Size: 3036160 |
Author: wangyao |
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Description: 15693 多功能射频卡 例程 里面提多语言的完整例子 -15693 Multi-function radio frequency card routines inside mention a complete multi-language examples
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Size: 547840 |
Author: wangyao |
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Description: RFID设计文档，包含详细的射频天线和模拟前端设计电路，设计流程和仿真结果-RFID design document, contains a detailed radio frequency antenna and analog front-end circuit design, design flow and simulation results
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Size: 1514496 |
Author: 张弥 |
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Description: Radio Frequency IDentification
飩?Tiny computer chips
飩?Passively Powered
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Size: 1565696 |
Author: Sergio |
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Description: 仿真GSM当中射频跳频时的同频和邻频碰撞情况-Simulation of GSM frequency hopping radio frequency which at the time of the collision with the frequency and circumstances邻频
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Size: 83968 |
Author: 雷志纯 |
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Description: 无限射频识别技术规划与实施，希望能对需要的人有所帮助吧-Unlimited radio frequency identification technology planning and implementation
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Size: 7183360 |
Author: kathy |
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Description: 运动目标模拟器相参性分析，分析了基于数字射频存储器(DRFM)的运动目标模拟器(MTS)相参性。由于DRFM延时的离散性,引起了MTS输出信号相位的改变,破坏了信号的相参性,使MTS输出信号频谱发生变化,不仅使谱线位置移动,而且还产生了附加的寄生谱线。分析结果表明,延时更新率(Fc)决定了谱线间隔,并通过sinc函数决定谱线的幅度,而雷达信号频率与所模拟目标的速度共同决定谱线的移动。
-Moving Target Simulator Coherent Analysis, Moving Target Simulator (MTS)-based digital radio frequency memory (DRFM) coherent. Due to the the DRFM delay discrete MTS output signal of the phase change is caused, the destruction of the phase of the signal parameters, the MTS output signal spectrum changes, not only the spectral line position, but also generates additional parasitic spectral line. The analysis results show that the delay update rate (Fc) determines the spectral interval by sinc function determines the amplitude of the spectrum, while the radar signal frequency and speed together determine the movement of the spectral lines of the simulated target.
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Author: 李亮 |
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Description: 大家多多利用呵，资料找的不容易 delphi 射频卡，Mifare-Greater use of U.S. Oh, the information is not easy to find delphi radio frequency card, Mifare
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Size: 1358848 |
Author: 王杰 |
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Description: 认知无线电能有效缓解无线电频谱资源匮乏问题，正交频分复用（OFDM）非常适合认知无线电系统。动态频谱资源分配是认知系统的一项重要功能。本文的目标就是最小化成本函数，这个函数考虑到主用户以及次用户的干扰功率。-Cognitive radio (CR) is a promising concept for improving the utilization of scarce radio spectrum resources. Orthogonal frequency division multiplexing (OFDM) is regarded as a technology which is well-matched for CR systems. Dynamic resource allocation is an important task in such systems. A novel resource allocation algorithm for multiuser OFDM cognitive radio system is presented in this paper. The objective is to minimize a cost function which takes into account the interference
power experienced by the primary user as well as the base station transmit power for secondary users given minimum bit rate requirements for each secondary user.
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Size: 201728 |
Author: 洪波 |
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Description: xe1205无线射频芯片驱动程序，真的很好呀-radio frequency chip xe1205 driver, you really good
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Size: 30720 |
Author: 吕昌江 |
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Description: 2007全国电子大赛一等奖也是2008黑龙江省一等奖作品《无线识别装置》-2007 National Electronics Competition first prize in 2008 in Heilongjiang Province is also the first work " radio frequency identification device"
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Size: 1269760 |
Author: 顾康 |
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Description: 影响单片机系统运行稳定性的因素可大体分为射频干扰、电源线或电源内部产生的干扰、振荡源的稳定性和复位电路的可靠性 ，在这里就可以看出复位电路的重要性。 -Affect the stability of single-chip system factors can be divided into radio frequency interference, the power cord or power supply internally generated interference, the source of oscillation stability and reliability reset circuit, can be seen here on the importance of reset circuit.
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Size: 73728 |
Author: 了缘 |
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Description: ① 设计并制作一个主站，传送一路语音信号，其发射频率在30MHz~40MHz之间自行选择，发射峰值功率不大于20mW(50 假负载电阻上测定)，射频信号带宽及调制方式自定，主站传送信号的输入采用话筒和线路输入两种方式；
② 设计并制作一个从站，其接收频率与主站相对应，从站必须采用电池组供电，用耳机收听语音信号；
③ 当传送信号为300Hz~3400Hz的正弦波时，去掉收、发天线，用一个功率衰减20dB左右的衰减器连接主、从站天线端子，通过示波器观察从站耳机两端的接收波形，波形应无明显失真；
④ 主、从站室内通信距离不小于5米，题目中的通信距离是指主、从站两设备(含天线)间的最近距离；
⑤ 主、从站收发天线采用拉杆天线或导线，长度小于等于1米。
-① design and production of a main station, all the way to send voice signals, the firing frequency at 30MHz ~ 40MHz to choose between the launch peak power less than 20mW (50 load resistance on the determination false), radio frequency signal modulation bandwidth and self- , the main station to send signals using the microphone input and line input in two ways
② design and production of a slave, to receive the frequency corresponding to the main station, from the station battery power must be used with headphones to listen to voice signals
③ When the transmission signal of 300Hz ~ 3400Hz sine wave, the removal of land, the antenna, with a power attenuation of about 20dB attenuator connecting to the main, from the antenna terminal station through the oscilloscope to observe from the headset on both ends of the receiving station waveform, waveform should no significant distortion
④ owners, interior communication distance from the station is not less than 5 meters, the
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Size: 629760 |
Author: liusixue |
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Description: 目前的智能机在硬件上多采用双cpu的架构，一个是基带处理器，主要处理数字信号、语音信号的编码解码以及GSM通信协议，另一个是应用处理器，运行操作系统和各种应用程序。基带处理器、射频和其它外围芯片作为一个模块，成为GSM/GPRS modem，提供AT命令接口。网络的应用已经是一个需求的热点，而目前的GSM模块大多都能支持GPRS功能。应用处理器通过AT命令集与带GPRS功能的无线通讯模块通信，为实现网络的应用提供了一个最底层的支持。
-Intelligent machines in the current hardware on many dual-cpu architecture of a baseband processor are mainly deal with digital signals, voice signals, and GSM codecs communication protocol, and the other is the application processor, operating system and applications running procedures. Baseband processor, radio frequency and other peripheral chips, as a module, as a GSM/GPRS modem, provided by AT command interface. Application of network needs is a hot spot, and most of the current GSM module can support GPRS function. Application processor through the AT command set and functionality with GPRS wireless communication module, in order to achieve the application of the network provides a bottom support.
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Size: 194560 |
Author: eleven |
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Description: 射频确认((RFID)正迅速改变生意跟踪盘货和资产的方式.从对美国国防部沃尔-马特和特斯科,早期努力正已经展示好处,但是为RFID软件,融合和数据处理使目前一挑战平息下来.如果你是一个设计师把发展一RFID系统记在一开发者金色上的,这本书是给你的.广阔经验鼓励,比尔Glover和Himanshu Bhatt为你提供重要的关于这新兴技术的信息.
-Radio Frequency Identification (RFID) is rapidly changing the way businesses track inventory and assets. From Wal-Mart and Tesco to the US Department of Defense, early efforts are already showing benefits, but software, integration, and data processing for RFID still present a challenge. If you are a developer or an architect charged with developing an RFID system, this book is for you. Drawing on extensive experience, Bill Glover and Himanshu Bhatt provide you with essential information on this emerging technology.
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Size: 1661952 |
Author: Jack |
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Description: 一本关于ＣＤＭＡ系统射频部分设计的书籍，包括与其它子系统的关联接口．-CDMA system on a radio frequency part of the design books, including those associated with other subsystems interface.
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Size: 819200 |
Author: fer der |
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Description: 随着现代微机电系统（MEMS, Micro-Electro-Mechanism System）、微电子、片上系统SOC
（System-On-Chip）、纳米材料、传感器、无线通讯、计算机网络、分布式信息处理等技术发展，无线传
感器网络（Wireless Sensor Networks, WSN）和射频标签（Radio Frequency Identification，RFID）在近
几年获得了飞速发展。这两项技术相互独立，却又存在着千丝万缕的联系，它们相互交叉和相互整合，具
有十分广阔的应用前景，在军事国防、工农业控制、城市管理、生物医疗、环境监测、抢险救灾、防恐反
恐、危险区域远程控制，物流管理，人员识别，汽车工业等许多领域都有重要的科研价值和实用价值，已
经引起了国内外研究及工业界广泛的重视。 -WEB：http://www.wsn.org.cn/contact.htm EMAIL：wsnbooks@nbicc.com
电话：0574-87910141/0574-87910139
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Size: 33078272 |
Author: zjy |
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