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IR Frequency Region: Fingerprint Region01:03

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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
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IR-UWB Pulse Generation Using FPGA Scheme for through Obstacle Human Detection.

Lalida Tantiparimongkol1, Pattarapong Phasukkit1

  • 1Department of Electronics Engineering, Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand.

Sensors (Basel, Switzerland)
|July 9, 2020
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Summary

This study introduces a novel Field Programmable Gate Array (FPGA) scheme for generating impulse-radio ultra-wideband (IR-UWB) pulses. This technology successfully detects and locates human subjects via respiration through rubble, demonstrating its potential for disaster response.

Keywords:
FPGAIR-UWB radardelay-linedoppler frequencyhuman through-obstacle detectionrange estimationrespiratory rate

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Area of Science:

  • Electrical Engineering
  • Radar Systems
  • Signal Processing

Background:

  • Search and rescue operations in earthquake aftermaths are critical.
  • Detecting survivors under rubble presents significant challenges.
  • Impulse-radio ultra-wideband (IR-UWB) technology offers potential for through-obstacle detection.

Purpose of the Study:

  • To propose a Field Programmable Gate Array (FPGA) scheme for generating an impulse-radio ultra-wideband (IR-UWB) pulse.
  • To design an IR-UWB radar system for detecting human respiration under rubble.
  • To enable location estimation of detected human subjects.

Main Methods:

  • Developed an FPGA scheme comprising a digital clock manager, four-delay-paths stratagem, and edge combiner.
  • Implemented an IR-UWB radar system utilizing the FPGA-generated pulse.
  • Conducted experiments with human subjects positioned under stacked clay bricks.

Main Results:

  • Achieved an IR-UWB pulse with a duration of 540 ps and a bandwidth of 2.073 GHz (1.797 fractional bandwidth).
  • Successfully detected human subjects through layers of clay bricks by sensing their respiration.
  • Accurately estimated the range to locate the human subjects.

Conclusions:

  • The proposed FPGA scheme effectively generates IR-UWB pulses suitable for through-obstacle detection.
  • The IR-UWB radar system demonstrates capability in detecting and locating survivors via respiration under rubble.
  • This technology holds promise for various applications requiring non-invasive detection through obstacles.