Phase jitter modulation

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The phase jitter modulation ( English phase jitter modulation ) is a on the phase noise based modulation method which, inter alia, in RFID systems (RFID = radio frequency identification is used). The process is designed for the rapid identification of a large number of RFID tags and is standardized in ISO / IEC 18000-3 under the title RFID Air Interface Standard .

In the method, an alternating magnetic field with a carrier frequency of 13.56 MHz is used, which is used both for energy transfer to the RFID tag and for data transfer. PJM belongs to the group of so-called Vicinity Contactless Tags , which are RFID tags that can bridge a distance of up to 100 cm.

The advantage of PJM over older Vicinity standards (for example ISO 15693) is the high data transmission rate and the large number of RFID tags that can be located in the reception area at the same time. With PJM up to 1500 articles per second can be identified. PJM can be used where a large number of small, possibly stacked, articles need to be identified. Due to its high speed, this technology can be used on conveyor belts, for example.

Applications

The first applications are seen in the pharmaceutical sector or in document and media management.

literature

  • Martin Finger: Conception of an identification system based on Bluetooth. Jörg Vogt Verlag, Dortmund 2008, ISBN 978-3-938860-16-8 .
  • Bill Waggener: Pulse Code Modulation Techniques. Thomson Publishing Inc., New York 1995, ISBN 0-442-01436-8 .
  • Mike Peng Li: Jitter, Noise, and Signal Integrity at High-Speed. Pearson Education, Indianapolis 2008, ISBN 0-13-242961-6 .
  • Nihal Kularatna, Dileeka Dias: Essentials of Modern Telecommunications Systems. Artech House Inc., Boston 2004, ISBN 1-58053-491-0 .

Individual evidence

  1. ^ RFID News Roundup . RFID journal
  2. ↑ Innovative print research ( Memento of the original from July 26, 2009 in the Internet Archive ) Info: The @1@ 2Template: Webachiv / IABot / www.medialine.de archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. . Focus