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Author Jianzhong Huang ♦ Shengli Zhou ♦ Jie Huang ♦ Berger, C.R. ♦ Willett, P.
Sponsorship IEEE Signal Processing Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2007
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics
Subject Keyword Underwater acoustics ♦ Channel estimation ♦ Doppler effect ♦ OFDM ♦ Decoding ♦ Noise ♦ Iterative decoding ♦ Time varying systems ♦ underwater acoustic communications ♦ Inter-carrier interference (ICI) ♦ iterative receiver ♦ orthogonal-frequency-division-multiplexing (OFDM) ♦ sparse channel estimation ♦ turbo equalization
Abstract Multicarrier modulation in the form of orthogonal-frequency-division-multiplexing (OFDM) has been intensively pursued for underwater acoustic (UWA) communications recently due to its ability to handle long dispersive channels. Fast variation of UWA channels destroys the orthogonality of the sub-carriers and leads to inter-carrier interference (ICI), which degrades the system performance significantly. In this paper, we propose a progressive receiver dealing with time-varying UWA channels. The progressive receiver is in nature an iterative receiver, based on the turbo principle. However, it distinguishes itself from existing iterative receivers in that the system model for channel estimation and data detection is itself continually updated during the iterations. When the decoding in the current iteration is not successful, the receiver increases the span of the ICI in the system model and utilizes the currently available soft information from the decoder to assist the next iteration which deals with a channel with larger Doppler spread. Numerical simulation and experimental data collected from the 2008 Surface Processes and Acoustic Communications Experiment (SPACE08) show that the proposed receiver can self adapt to channel variations, enjoying low complexity in good channel conditions while maintaining excellent performance in adverse channel conditions.
Description Author affiliation :: Dept. of Electr. & Comput. Eng., Univ. of Connecticut, Storrs, CT, USA
Author affiliation :: Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA
ISSN 19324553
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2011-12-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 5
Issue Number 8
Size (in Bytes) 1.35 MB
Page Count 13
Starting Page 1524
Ending Page 1536


Source: IEEE Xplore Digital Library