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On efficient channel estimation for underwater acoustic OFDM systems

Published: 03 November 2009 Publication History

Abstract

Channel estimation algorithms for Orthogonal Frequency Division Multiplexing (OFDM) employed in underwater acoustic (UWA) channels are investigated. Due to the slow propagation speed of acoustic waves, the compression and dilation effect on the time domain waveform warrant explicit time-varying Doppler scale estimation and compensation. In UWA channels, the residual Doppler error after compensation can be highly correlated due to very slow variation in Doppler scaling. This paper proposes a spectrally efficient and high performance frequency domain pilot symbol assisted modulation (PSAM) channel estimation scheme that fully exploits not only the time and frequency correlation of the channel, but also the correlation in the residual Doppler. The scheme is extended to Multiple-Input Multiple-Output (MIMO) systems which further improves spectral efficiency. Simulation results demonstrate that the performance of the proposed channel estimation schemes and it is observed that the BER performance increases when the correlation in the residual Doppler is also exploited.

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cover image ACM Conferences
WUWNet '09: Proceedings of the 4th International Workshop on Underwater Networks
November 2009
99 pages
ISBN:9781605588216
DOI:10.1145/1654130
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Published: 03 November 2009

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  • (2023)On the Effect of Channel Knowledge in Underwater Acoustic Communications: Estimation, Prediction and ProtocolElectronics10.3390/electronics1207155212:7(1552)Online publication date: 25-Mar-2023
  • (2021)Subcarrier Mapping for Underwater Video Transmission Over OFDMIEEE Journal of Oceanic Engineering10.1109/JOE.2021.307627446:4(1408-1423)Online publication date: Oct-2021
  • (2014)Trace-orthogonal pulse position modulation space time block coding for underwater links2014 Oceans - St. John's10.1109/OCEANS.2014.7003193(1-5)Online publication date: Sep-2014
  • (2014)EV-sounding: A visual assisted electronic channel sounding systemIEEE INFOCOM 2014 - IEEE Conference on Computer Communications10.1109/INFOCOM.2014.6848083(1483-1491)Online publication date: Apr-2014
  • (2012)Maximizing the data transmission rate of a cooperative relay system in an underwater acoustic channelInternational Journal of Communication Systems10.1002/dac.126625:2(231-253)Online publication date: 1-Feb-2012

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