A journey toward modeling and resolving doppler in underwater acoustic communications

Fengzhong Qu, Zhenduo Wang, Liuqing Yang, Zhihui Wu

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Underwater acoustic (UWA) communications is the only reliable method for long-distance communications underwater, and is widely used in commercial, scientific, and military scenarios. However, the UWA channel is most challenging due to its double dispersion property in both long time delay and large Doppler spread, resulting in severe multipath spread and time variation. Among these, Doppler spread is one of the most critical challenges, and researchers have proposed various models in order to resolve Doppler spread in UWA channels. In this article, an overview of Doppler modeling and resolving is provided, divided into four stages: the quasi-static model of the mid-1980s, the uniform Doppler shift model in the 1990s, the basis expansion model and uniform path speed models of the late 1990s, and the recently developed non-uniform path speed model. Furthermore, the UWA channel sparsity property utilized by each of those models will also be discussed.

Original languageEnglish (US)
Article number7402260
Pages (from-to)49-55
Number of pages7
JournalIEEE Communications Magazine
Volume54
Issue number2
DOIs
StatePublished - Feb 2016
Externally publishedYes

Keywords

  • Bandwidth
  • Delay effects
  • Doppler shift
  • Mathematical model
  • Receivers
  • Time-frequency analysis
  • Underwater acoustics
  • Underwater communication

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