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Wideband Optical Detector of Ultrasound for Medical Imaging Applications
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Generalized Frequency Division Multiplexing-Based Low-Power Underwater Acoustic Image Transceiver.

Chin-Feng Lin1, Cheng-Fong Wu1, Ching-Lung Hsieh1

  • 1Department of Electrical Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan.

Sensors (Basel, Switzerland)
|January 11, 2022
PubMed
Summary

This study introduces a low-power underwater acoustic image transceiver using generalized frequency division multiplexing (GFDM) for efficient underwater communication. The system achieves high-resolution underwater images with excellent signal-to-noise ratios, demonstrating its suitability for transmitting sensor data.

Keywords:
BERGFDMimage transceiverlow-powersimulation of transmission

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Area of Science:

  • Underwater Acoustic Communication
  • Digital Signal Processing
  • Image Transmission

Background:

  • Underwater acoustic (UWA) communication faces challenges in transmitting high-resolution images due to limited bandwidth and high error rates.
  • Existing UWA systems often struggle with power efficiency and data integrity for image transmission.

Purpose of the Study:

  • To propose and evaluate a novel low-power UWA image transceiver.
  • To enhance the performance of underwater image communication using advanced modulation and error correction techniques.

Main Methods:

  • Integration of generalized frequency division multiplexing (GFDM) modulation.
  • Implementation of low-density parity-check (LDPC) code error protection.
  • Utilization of adaptive 4-quadrature amplitude modulation (QAM) and 16-QAM with a power assignment mechanism.
  • Simulation of bit error rates (BER), peak signal-to-noise ratios (PSNR), and power-saving ratio (PSR) under various channel estimation errors (CEEs).

Main Results:

  • The proposed transceiver achieved a PSNR of 48.79 dB with 16-QAM and a 10% CEE, outperforming 4-QAM (44.46 dB).
  • High PSNR values and resolutions were obtained for received underwater images at a BER of 10-4.
  • The system demonstrated significant power-saving capabilities.

Conclusions:

  • The developed GFDM-based UWA transceiver is effective for transmitting high-quality underwater images.
  • The integration of LDPC, adaptive QAM, and GFDM enhances communication reliability and efficiency.
  • The transceiver shows promise for applications in underwater sensing and data acquisition.