Interference reduction scheme for UHF passive RFID systems using modulation index control

Yoshinori Tanaka, Iwao Sasase

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

Performance of UHF-band passive RFID system in a dense multi-reader environment is limited by both the reader-to-reader interference and reader-to-tag interference. In this paper, we firstly propose a combination of a subcarrier modulation backscattering and a reduced carrier frequency offset among readers to reduce both the reader-to-reader interference and the reader-to-tag interference. Then, we propose a new distributed modulation index control scheme using a tag's SINR estimation at readers in order to further reduce the reader-to-tag interference. By adaptively controlling the each reader's transmission modulation index, the asymmetric reader-to-tag interference can be effectively controlled to satisfy the required SINR of tags. Computer simulations show that the proposed scheme can reduce the minimum required inter-reader distance or increase the number of concurrently operable readers in dense multireader environments, especially when there is large unbalance among the reader-to-tag interferences on tags. copyright

本文言語English
ホスト出版物のタイトル2008 14th Asia-Pacific Conference on Communications, APCC 2008
出版ステータスPublished - 2008
イベント2008 14th Asia-Pacific Conference on Communications, APCC 2008 - Akihabara, Tokyo, United States
継続期間: 2008 10月 142008 10月 16

出版物シリーズ

名前2008 14th Asia-Pacific Conference on Communications, APCC 2008

Other

Other2008 14th Asia-Pacific Conference on Communications, APCC 2008
国/地域United States
CityAkihabara, Tokyo
Period08/10/1408/10/16

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 通信

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