《多信道多级复用转换的数字下转换器及其在RFID读写器的应用》.pdfVIP

NOVEL MULTI-STAGE TRANSMULTIPLEXING DIGITAL DOWN CONVERTER FOR IMPLEMENTATION OF RFID (ISO18000-3 MODE 2) READER/WRITER 1 1 2 2 Yuichi Nakagawa , Masahiro Muraguchi , Hideki Kawamura , Kyoji Ohashi , Kei Sakaguchi3 , Kiyomichi Araki3 1 Graduate School of Science and Engineering, Tokyo University of Science, 1-14-6 Kudanshita, Chiyoda-ku, Tokyo, 102-0073 Japan, j4306647@ed.kagu.tus.ac.jp 2 The Nippon Signal Co., Ltd., 11 Hiraide-Kogyo-Danchi, Utsunomiya, Tochigi, 321-8651 Japan. 3 Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552 Japan. Abstract - Implementation of RFID reader/writer on soft- equivalent taps can be realized. In recent days, 3-stage FIR filter ware defined radio is studied in this paper. The target RFID is is commonly used for computationally efficient DDC as in [4]. ISO18000-3 mode 2 which has 8 reply channels for simultane- Transmultiplexer is used to convert frequency division multi- ous communication with 8 different RFID tags. In the software plexing (FDM) signal to time division multiplexing (TDM) sig- defined radio architecture, the 8 reply channels are sampled at a nal, and vice versa. A novel digital transmultiplexing architec- single A/D converter and separated by digital down converters, ture based on polyphase filter bank has been proposed for par- whereas conventional RFID architecture has redundant 8 paral- allel DDCs as in [8]. Unfortunatly, since the channel spacing in lel analog down converters. A novel multi-stage transmultiplex- the ISO18000-3 mode 2 standard is not uniform, the architecture ing digital down converter is proposed for