Efficient Multicarrier Communication for Highly Spread Underwater Acoustic Channels

In this paper we propose a novel method for communication over underwater acoustic channels that exhibit simultaneously large delay spread and Doppler spread, such as those found in the surf zone. In particular, we propose a coded pulse-shaped multicarrier scheme that converts the doubly dispersive...

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Veröffentlicht in:IEEE journal on selected areas in communications 2008-12, Vol.26 (9), p.1674-1683
Hauptverfasser: Sung-Jun Hwang, Schniter, P.
Format: Artikel
Sprache:eng
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Zusammenfassung:In this paper we propose a novel method for communication over underwater acoustic channels that exhibit simultaneously large delay spread and Doppler spread, such as those found in the surf zone. In particular, we propose a coded pulse-shaped multicarrier scheme that converts the doubly dispersive channel into an inter-carrier interference (ICI) channel with small ICI spread. The resulting ICI is mitigated using a soft noncoherent equalizer that leverages sparsity in the delay-power profile to generate near-optimal bit estimates with low complexity. The noncoherent equalizer uses a delay-power-profile estimate (rather than a channel estimate) which is obtained from pilots. Numerical simulations with surf-zone-like channels demonstrate performance close to genie-aided bounds.
ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2008.081207