Selective decision directed channel estimation for UWA OFDM systems

Andreja Radosevic, Tolga M. Duman, John G. Proakis, Milica Stojanovic

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

10 Scopus citations

Abstract

In this paper we explore the performance of a selective decision directed channel estimation (CE) method for underwater acoustic (UWA) orthogonal frequency division multiplexing (OFDM) based communications. The method is based on hard or soft selection of data sub-carriers that are used in the decision directed mode. Particularly, in the process of hard selection we choose those sub-carriers that have high signal-to-noise ratios (SNR), while in the process of soft selection we weight the data sub-carriers for reliable channel estimation. The latter approach is shown to be advantageous since the channel state information (CSI) from all data sub-carriers is exploited. We couple selective decision directed CE with different channel reconstruction methods such as least-squares (LS) with thresholding, orthogonal matching pursuit (OMP), and basis pursuit denoising (BPD). Our results indicate good performance improvements as compared to the block-by-block pilot-assisted CE with a uniform pilot grid for high spectral efficiency communications. Moreover, we explore the trade-offs resulting from using a varying number of pilots and/or decision directed data sub-carriers in terms of the overall system throughput and bit error rate (BER). Experimental results are obtained using real data measurements from the Mobile Acoustic Communication Experiment 2010 (MACE'10), conducted off the coast of Martha's Vineyard.

Original languageEnglish (US)
Title of host publication2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011
Pages647-653
Number of pages7
DOIs
StatePublished - Dec 1 2011
Event2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011 - Monticello, IL, United States
Duration: Sep 28 2011Sep 30 2011

Publication series

Name2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011

Other

Other2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011
CountryUnited States
CityMonticello, IL
Period9/28/119/30/11

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Control and Systems Engineering

Fingerprint Dive into the research topics of 'Selective decision directed channel estimation for UWA OFDM systems'. Together they form a unique fingerprint.

  • Cite this

    Radosevic, A., Duman, T. M., Proakis, J. G., & Stojanovic, M. (2011). Selective decision directed channel estimation for UWA OFDM systems. In 2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011 (pp. 647-653). [6120229] (2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011). https://doi.org/10.1109/Allerton.2011.6120229