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Distributed compressed sensing based channel estimation for underwater acoustic multiband transmissions.

Yuehai Zhou1, Aijun Song2, F Tong1

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The Journal of the Acoustical Society of America
|July 2, 2018
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Summary
This summary is machine-generated.

New algorithms improve underwater acoustic channel estimation by using multiple sub-bands and a novel selection strategy. These methods enhance sparse channel estimation performance in multiband systems.

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Area of Science:

  • Signal Processing
  • Underwater Acoustics
  • Compressed Sensing

Background:

  • Sparse channel estimation is crucial for underwater acoustic (UWA) systems.
  • Distributed compressed sensing (DCS) offers a framework for UWA channel estimation.
  • Existing methods like Orthogonal Matching Pursuit (OMP) and Simultaneous OMP (SOMP) have limitations in multiband scenarios.

Purpose of the Study:

  • To enhance sparse channel estimation performance in UWA multiband systems.
  • To develop novel algorithms that leverage multi-subband information and temporal coherence.
  • To improve the accuracy and robustness of channel estimation in challenging UWA environments.

Main Methods:

  • Application of DCS principles to UWA channel estimation.
  • Development of a Joint-Band Multiple Sub-band Selection (JB-MSSOMP) algorithm.
  • Extension to a Joint-Band-Temporal (JBT-MSSOMP) algorithm incorporating channel coherence over time.
  • Utilizing a multiple selection strategy to identify channel tap positions across sub-bands.

Main Results:

  • The proposed JB-MSSOMP and JBT-MSSOMP algorithms demonstrate superior channel estimation performance compared to conventional OMP and SOMP.
  • Simulations confirm improved accuracy in detecting channel tap positions.
  • Real-world acoustic experimental data validates enhanced receiver performance using the novel estimators.

Conclusions:

  • The JB-MSSOMP and JBT-MSSOMP algorithms effectively improve sparse channel estimation in UWA multiband systems.
  • The multiple selection strategy and temporal coherence utilization are key to performance gains.
  • These advanced channel estimators offer practical benefits for UWA communication systems.