Doppler compensation for AF two way relaying over time varying UWA channels

Saed Daoud, Bahattin Karakaya, Ali Ghrayeb

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

Abstract

In this paper, we consider Doppler compensation for time varying underwater acoustic channels. The underlying system model comprises two sources, S1 and S2, communicating with each other through a relay, R. The transmission process goes through two phases. In the first phase, the two sources transmit simultaneously and the relay receives. In the second phase, the relay processes the received signals and broadcasts the combined signal to the destinations, i.e., sources. The underlying channels are considered to be time varying frequency selective channels, where the only source of time variation is the relative motion between the transceivers. Orthogonal frequency division multiplexing (OFDM) is used as a means to combat frequency selectivity. Two cases are considered, namely, when R uses multiple resampling (MR) preprocessing to reduce the effect of intercarrier interference (ICI) resulting from the time variation, and when R uses single resampling (SR) preprocessing. In both cases, in the second phase of transmission, each source performs MR preprocessing and after subtracting its own signal ICI equalization is performed to further reduce the effect of residual ICI. Simulation results show that performing MR at R outperforms the case when SR is used at R, however, this comes at the expense of more hardware complexity.

Original languageEnglish
Title of host publicationIEEE Wireless Communications and Networking Conference, WCNC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1082-1086
Number of pages5
ISBN (Electronic)9781479930838
DOIs
Publication statusPublished - 10 Nov 2014
Externally publishedYes
Event2014 IEEE Wireless Communications and Networking Conference, WCNC 2014 - Istanbul, Turkey
Duration: 6 Apr 20149 Apr 2014

Other

Other2014 IEEE Wireless Communications and Networking Conference, WCNC 2014
CountryTurkey
CityIstanbul
Period6/4/149/4/14

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Keywords

  • Amplify-and-forward
  • Doppler scaling
  • equalization
  • intercarrier interference
  • orthogonal frequency division multiplexing
  • physical layer network coding
  • resampling

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Daoud, S., Karakaya, B., & Ghrayeb, A. (2014). Doppler compensation for AF two way relaying over time varying UWA channels. In IEEE Wireless Communications and Networking Conference, WCNC (pp. 1082-1086). [6952279] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNC.2014.6952279