Simultaneous Human Detection And Ranging Using A Millimeter-wave Radar System Transmitting Wideband Noise With An Embedded Tone.

Open Access
Author:
Gallagher, Kyle A
Graduate Program:
Electrical Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
March 26, 2013
Committee Members:
  • Ram Mohan Narayanan, Thesis Advisor
  • Timothy Joseph Kane, Thesis Advisor
Keywords:
  • Radar
  • Noise Radar
  • Doppler Radar
  • Human Detection
  • Human Doppler
  • Doppler
  • Micro-Doppler
  • Millimeter-Wave
  • Millimeter Wave
Abstract:
This thesis describes a millimeter-wave (mm-wave) radar system that has been constructed to range humans concealed in light foliage at distances up to 213 meters and detect human Doppler response up to 90 meters away. This is done by utilizing a composite signal consisting of two waveforms: a wide-band noise waveform and a single tone. These waveforms are summed together and transmitted simultaneously. Matched filtering of the received and transmitted noise signals is performed to range targets with high resolution, while the received single tone signal is used for Doppler analysis. The Doppler measurements are used to distinguish between different human movements using characteristic micro-Doppler signals. Using hardware and software filters allows for simultaneous processing of both the noise and Doppler waveforms. Our measurements establish the mm-wave systems ability to range humans up to 213 meters and distinguish between different human movements at 90 meters. The radar system was also tested through light foliage. In this thesis, we describe the architecture of the multi-modal mm-wave radar system and present results on human target ranging and Doppler characterization of human movements. In addition to ranging and characterizing human movements, data are presented showing the differences in reflected signal strength between a human with and without a concealed metallic object.