Real-time separation of collided signals in multiple zones backscatter communication system

Jin Mitsugi, Hiromu Kamei, Yuusuke Kawakita, Haruhisa Ichikawa

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

Abstract

Backscatter communication is essential in applications where wireless and batteryless sensors are demanded. Backscatter communication system may suffer short communication range because its sensors transmit signals by means of the reflection of incident radio wave that is provided by counterpart interrogator. The use of multiple interrogators, forming multiple interrogation zones, is the usual practice to extend the range of backscatter communication system. However, if a sensor receives more than one radio waves-one from its counterpart interrogator and others from neighbor interrogators-the sensor produces modulated backscatters to all the interrogators, causing interference to neighbor interrogators. This inter-zone interference is particularly problematic when multiple sensors send stream data concurrently. This paper proposes a real-time separation of collided backscatter signals based on their statistical independence. The proposal uses a priori probability of backscatter signal to extract the independent carrier phase angles and the independent amplitudes from IQ signal observation. The measurement of channel state information with predefined symbol pattern in packet is not needed. The proposal is evaluated both in numerical simulations and a physical experiment using prototype backscatter sensors and a software-defined interrogator. The results show that collided backscatter signals can be separated in real-time without degrading the packet error rate of each signal.

Original languageEnglish
Title of host publication7th IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2019 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages87-92
Number of pages6
ISBN (Electronic)9781728121406
DOIs
Publication statusPublished - 2019 Oct
Event7th IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2019 - Ottawa, Canada
Duration: 2019 Oct 162019 Oct 18

Publication series

Name7th IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2019 - Conference Proceedings

Conference

Conference7th IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2019
CountryCanada
CityOttawa
Period19/10/1619/10/18

Keywords

  • Interference Rejection
  • Passive backscatter
  • Software Defined Radio
  • Statistical Independence

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Aerospace Engineering
  • Instrumentation

Fingerprint Dive into the research topics of 'Real-time separation of collided signals in multiple zones backscatter communication system'. Together they form a unique fingerprint.

  • Cite this

    Mitsugi, J., Kamei, H., Kawakita, Y., & Ichikawa, H. (2019). Real-time separation of collided signals in multiple zones backscatter communication system. In 7th IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2019 - Conference Proceedings (pp. 87-92). [8920346] (7th IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2019 - Conference Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WiSEE.2019.8920346