An evaluation of the hybrid sparse/diffuse algorithm for underwater acoustic channel estimation

Nicoló Michelusi, Beatrice Tomasi, Urbashi Mitra, James Preisig, Michele Zorzi

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

2 Scopus citations


The underwater acoustic channel has been usually modeled as sparse. However, in some scenarios of interest, e.g., shallow water environments due to the interaction with the surface and the seabed, the channel exhibits also a dense arrival of multipath components. In these cases, a Hybrid Sparse/Diffuse (HSD) channel representation, rather than a purely sparse one, may be more appropriate. In this work, we present the HSD channel model and channel estimators based on it. We evaluate these estimation strategies on the SPACE08 experimental data set.We show that the HSD estimators outperform the more conventional purely sparse and least squares estimators. Moreover, we show that an exponential Power Delay Profile (PDP) for the diffuse component is appropriate in scenarios where the receiver is far away from the transmitter. Finally, the HSD estimators and the exponential PDP model are shown to be robust even in scenarios where the channel does not exhibit a diffuse component.

Original languageEnglish (US)
Title of host publicationOCEANS'11 - MTS/IEEE Kona, Program Book
PublisherIEEE Computer Society
ISBN (Print)9781457714276
StatePublished - 2011
Externally publishedYes
EventMTS/IEEE Kona Conference, OCEANS'11 - Kona, HI, United States
Duration: Sep 19 2011Sep 22 2011

Publication series

NameOCEANS'11 - MTS/IEEE Kona, Program Book


OtherMTS/IEEE Kona Conference, OCEANS'11
Country/TerritoryUnited States
CityKona, HI

ASJC Scopus subject areas

  • Ocean Engineering
  • Electrical and Electronic Engineering


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