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Radio Basics for RFID: Modulation and Multiplexing

Posted: 26 Sep 2007     Print Version  Bookmark and Share

Keywords:modulation  multiplexing  RFID 

This article is part of the book providing the basics on RF and RFID, and covers modulation and multiplexing. It includes a discussion on how modulation works for signals to convey information and how it expands the signal?s spectrum. Signals of interest for RFID are generally digitally modulated. Single sideband (SSB) and phase-reversal ASK (PR-ASK) modulations, which use phase information at the reader but require only amplitude detection from the tag, can be used to improve spectral efficiency.

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