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KAKEN_16K06367seika.pdf
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Download
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:236.9 KB
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:Oct 31, 2019 |
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Total downloads since Oct 31, 2019 : 1105
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電波伝播特徴量を用いたRFID読み取り空間フィルタの実現
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デンパ デンパ トクチョウリョウ オ モチイタ RFID ヨミトリ クウカン フィルタ ノ ジツゲン
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Denpa denpa tokuchōryō o mochiita RFID yomitori kūkan firuta no jitsugen
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RFID interrogation zone filtering with radio features
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三次, 仁
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ミツギ, ジン
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Mitsugi, Jin
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慶應義塾大学・環境情報学部 (藤沢) ・教授
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Research team head
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科研費研究者番号 : 40383921
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2019
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科学研究費補助金研究成果報告書
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2018
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UHF帯RFIDシステムにおいて、RFタグからの返信電波の搬送波位相情報を用いて、RFタグの位置を推定することにより、想定する読取り内外を弁別する方法について研究開発した。単一の搬送波位相を用いると、30ｃｍ程度の波長ごとに位相が繰り返す問題が生じるが、複数の搬送波を用い、外れ値除去を行いながら位相計測する微分位相方式を用いることで、この問題を解決できることを示し、実験で確認した。また商用リーダでは位相計測が必ずしも正確に行えないが、受信電波フレームの統計解析によって簡単・高速に位相角度が掲載できることも明らかにした。
We developed a localization method in UHF RFID that discriminates the RF tags within the designated interrogation zone from those outside the zone. The method is based on carrier phase measurement of backscatter signals using multiple carrier frequencies. Phase ambiguity, a big problem of phase based localization, can be compensated by taking differential phase with respective to carrier frequency using automatic outlier removal. Because he phase measurement accuracy of commercial RFID reader is not accurate enough, we also developed a method to derive backscatter phase by using covariance matrix of received signal, which achieves both accuracy and speed of measurement.
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研究種目 : 基盤研究 (C) (一般)
研究期間 : 2016～2018
課題番号 : 16K06367
研究分野 : 無線通信
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