A multifrequency radar system for detecting humans and characterizing human activities for short-range through-wall and long-range foliage penetration applications

Ram Mohan Narayanan, Sonny Smith, Kyle A. Gallagher

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A multifrequency radar system for detecting humans and classifying their activities at short and long ranges is described. The short-range radar system operates within the S-Band frequency range for through-wall applications at distances of up to 3 m. It utilizes two separate waveforms which are selected via switching: a wide-band noise waveform or a continuous single tone. The long-range radar system operating in the W-Band millimeter-wave frequency range performs at distances of up to about 100 m in free space and up to about 30 m through light foliage. It employs a composite multimodal signal consisting of two waveforms, a wide-band noise waveform and an embedded single tone, which are summed and transmitted simultaneously. Matched filtering of the received and transmitted noise signals is performed to detect targets with high-range resolution, whereas the received single tone signal is used for the Doppler analysis. Doppler measurements are used to distinguish between different human movements and gestures using the characteristic micro-Doppler signals. Our measurements establish the ability of this system to detect and range humans and distinguish between different human movements at different ranges.

Original languageEnglish (US)
Article number958905
JournalInternational Journal of Microwave Science and Technology
Volume2014
DOIs
StatePublished - Jan 1 2014

Fingerprint

foliage
Radar systems
radar
waveforms
penetration
radar range
frequency ranges
broadband
Millimeter waves
Frequency bands
S band
classifying
millimeter waves
Composite materials
composite materials

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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