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

Yoshinori Tanaka, Iwao Sasase

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

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

Original languageEnglish
Title of host publication2008 14th Asia-Pacific Conference on Communications, APCC 2008
Publication statusPublished - 2008 Dec 1
Event2008 14th Asia-Pacific Conference on Communications, APCC 2008 - Akihabara, Tokyo, United States
Duration: 2008 Oct 142008 Oct 16

Publication series

Name2008 14th Asia-Pacific Conference on Communications, APCC 2008

Other

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

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

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    Tanaka, Y., & Sasase, I. (2008). Interference reduction scheme for UHF passive RFID systems using modulation index control. In 2008 14th Asia-Pacific Conference on Communications, APCC 2008 [4773727] (2008 14th Asia-Pacific Conference on Communications, APCC 2008).