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<html> <head> <title>RFID-Bulletin Board: RFID Modulation Systems, Theresia D Sapatra at 7/16/2000 15:31</title> <!-- Anfang Header --><!-- Ende Header --> </head> <BODY BGCOLOR="#fffcf4"><!-- Anfang BeitragsseitenKopf --><!-- Ende BeitragsseitenKopf --><!-- AnfangBanner --><!-- EndeBanner --><blockquote> <center> <h1>RFID Modulation Systems</h1> </center><!-- Anfang BeitragsNavigationsLeisteOben --><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><center><P><B>[ <a href="../index.htm">RFID-Bulletin Board</a> ]</B></P></center><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><!-- Ende BeitragsNavigationsLeisteOben --><p>Written by <a href="mailto:tsapatra@yahoo.com">Theresia D Sapatra</a> at 16 Jul 2000 15:31:28:<p>Hi,<br>I'm confuse with the communication system of RFID systems. As far as I know, the<br>process is first reader generates RF field to activate tag. Then tag rectified the field<br>and made it as the operation voltage (DC). Then tag will sends its data to the reader <br>by analog modulation (like load modulation or backscatter), and then reader receiver<br>receive the data and convert it to the original data. And then encoding the data <br>by digital modulation (ASK, FSK,PSK) and send it to host computer . What I want to <br>know is :<br> 1. When does the reader sends data to the transponder ? what for ?<br> What kind of modulation used to send data from "reader" to "transponder"?<br> 2. Why does data sending from "transponder" to the "reader" doens't used digital<br> modulation ?<br> 3. PLease give me explanation about what data sends from reader to transponder?<br>Well, anyone could help me to solve my problem? I need to know the RFID system<br>for my presentation in my university. If you can help me please send mail to :<br>tsapatra@yahoo.com<br>Thank you very much for your help and God Bless You all. <br><br><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><form method=POST action="http://f16.parsimony.net/forum26490/wwwforum.cgi?formular"><input type=hidden name="followup" value="122"><input type=hidden name="origname" value="Theresia D Sapatra"><input type=hidden name="origemail" value="tsapatra@yahoo.com"><input type=hidden name="origsubject" value="RFID Modulation Systems"><input type=hidden name="origdate" value="16 Jul 2000 15:31:28"><input type=hidden name="subject" value="Re: RFID Modulation Systems"><input type=hidden name="body" value=">Hi,>I'm confuse with the communication system of RFID systems. As far as I know, the>process is first reader generates RF field to activate tag. Then tag rectified the field>and made it as the operation voltage (DC). Then tag will sends its data to the reader >by analog modulation (like load modulation or backscatter), and then reader receiver>receive the data and convert it to the original data. And then encoding the data >by digital modulation (ASK, FSK,PSK) and send it to host computer . What I want to >know is :> 1. When does the reader sends data to the transponder ? what for ?> What kind of modulation used to send data from "reader" to "transponder"?> 2. Why does data sending from "transponder" to the "reader" doens't used digital> modulation ?> 3. PLease give me explanation about what data sends from reader to transponder?>Well, anyone could help me to solve my problem? I need to know the RFID system>for my presentation in my university. If you can help me please send mail to :>tsapatra@yahoo.com>Thank you very much for your help and God Bless You all. "><input type="submit" name="abschicken" value="Write an answer"> <br><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><p><a name="followups"><B>Answers:</B></a><br><ul><!--insert: 122--></ul><!--end: 122--><!-- Anfang BeitragsNavigationsLeisteUnten --><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><center><P><B>[ <a href="../index.htm">RFID-Bulletin Board</a> ]</B></P></center><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><!-- Ende BeitragsNavigationsLeisteUnten --></blockquote><!-- Anfang BeitragsseitenFuss --><!-- Ende BeitragsseitenFuss --></body></html>⌨️ 快捷键说明
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