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AuthorDaoud, Saed
AuthorKarakaya, Bahattin
AuthorGhrayeb, Ali
Available date2016-05-26T12:20:02Z
Publication Date2014
Publication NameIEEE Wireless Communications and Networking Conference, WCNC
CitationS. Daoud, B. Karakaya and A. Ghrayeb, "Doppler compensation for AF two way relaying over time varying UWA channels," 2014 IEEE Wireless Communications and Networking Conference (WCNC), Istanbul, 2014, pp. 1082-1086.
AbstractIn 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.
SponsorGrant NPRP 09-126-2-054 from the Qatar National Research Fund (a member of Qatar Foundation).
SubjectDoppler scaling
Subjectintercarrier interference
Subjectorthogonal frequency division multiplexing
Subjectphysical layer network coding
SubjectComplex networks
SubjectInterference suppression
SubjectLocal area networks
SubjectNetwork coding
SubjectNetwork layers
SubjectUnderwater acoustics
SubjectWireless telecommunication systems
TitleDoppler compensation for AF two way relaying over time varying UWA channels
TypeConference Paper

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