Wirelessly Powered Backscatter Communications: Waveform Design and SNR-Energy Tradeoff

Bruno Clercks, Zati Bayani Zawawi, Kaibin Huang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This paper shows that wirelessly powered backscatter communications is subject to a fundamental tradeoff between the harvested energy at the tag and the reliability of the backscatter communication, measured in terms of SNR at the reader. Assuming the RF transmit signal is a multisine waveform adaptive to the channel state information, we derive a systematic approach to optimize the transmit waveform weights (amplitudes and phases) in order to enlarge as much as possible the SNR-energy region. Performance evaluations confirm the significant benefits of using multiple frequency components in the adaptive transmit multisine waveform to exploit the nonlinearity of the rectifier and a frequency diversity gain.

Original languageEnglish
JournalIEEE Communications Letters
DOIs
Publication statusAccepted/In press - 2017 Jun 16

Keywords

  • Antennas
  • Backscatter
  • Backscatter Communications
  • Frequency diversity
  • Radio frequency
  • Signal to noise ratio
  • SNR-Energy Tradeoff
  • Transmitters
  • Waveform Design
  • Wireless communication
  • Wireless Power Transfer

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

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