Compressive sampling and reconstruction of acoustic signal in underwater wireless sensor networks

Fei Yun Wu, Kunde Yang, Rui Duan, Tian Tian

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The process of gathering of scientific data plays an important role in telemonitoring and communications technologies of underwater information. However, to obtain such a huge data in underwater-wireless-sensor-networks, conventional methods often fail in energy efficiency. Compressive sampling (CS) provides a new perspective to solve the problem. Unfortunately, the underwater acoustic signal is non-sparse in the time domain and the current CS methods cannot be used directly. This paper adopts the discrete cosine transform-based dictionary-matrix for sparse representation. In addition, the measurement matrix is optimized via the steepest descent method for more efficient sampling. Then, we introduce an approach based on an approximated l0 norm at the receiving terminal, to search the sparse solution via the steepest descent method and projections. Combing with the measurement matrix and dictionary-matrix, the sparse estimation is used for reconstruction. Experimental results confirm the superior performances of the strategies of the proposed compressive sampling and reconstruction than those of the traditional measurement matrix and reconstruction methods, including matching pursuit and orthogonal matching pursuit methods.

Original languageEnglish
Pages (from-to)5876-5884
Number of pages9
JournalIEEE Sensors Journal
Volume18
Issue number14
DOIs
StatePublished - 15 Jul 2018

Keywords

  • approximated l(AL0) norm
  • Compressed sensing (CS)
  • discrete-cosine-transform (DCT)

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