Multi-Channel Multi-Stage Transmultiplexing Digital Down Converter and Its Application to RFID (ISO18000-3 mode 2) Reader/Writer

Yuichi NAKAGAWA; Kei SAKAGUCHI; Hideki KAWAMURA; Kyoji OHASHI; Masahiro MURAGUCHI; Kiyomichi ARAKI

doi:10.1093/ietcom/e91-b.1.139

Special Section on Cognitive Radio and Spectrum Sharing Technology

Multi-Channel Multi-Stage Transmultiplexing Digital Down Converter and Its Application to RFID (ISO18000-3 mode 2) Reader/Writer

Yuichi NAKAGAWA, Kei SAKAGUCHI, Hideki KAWAMURA, Kyoji OHASHI, Masahiro MURAGUCHI, Kiyomichi ARAKI

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Keywords: multi-channel multi-stage transmultiplexing digital down converter, software defined radio, RFID, ISO18000-3 mode 2, implementation on FPGA

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2008 Volume E91.B Issue 1 Pages 139-146

DOI https://doi.org/10.1093/ietcom/e91-b.1.139

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Abstract

Implementation of RFID reader/writer on software defined radio is studied in this paper. The target RFID is ISO18000-3 mode 2 which has 8 reply channels for simultaneous communication with 8 different RFID tags. In the software defined radio architecture, the 8 reply channels are sampled at a single A/D converter and separated by digital down converters, whereas conventional RFID architecture has redundant 8 parallel analog down converters. A novel multi-stage transmultiplexing digital down converter is proposed for efficient implementation of multi-channel digital down converter. Moreover the proposed architecture is implemented on a FPGA evaluation board, and validity of the system is confirmed on a real hardware. The proposed architecture can be applied to multi-channel receiver for dynamic spectrum system in the cognitive radio.

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