Noise Radar Tomography System Design and Data Collection

Open Access
Asmuth, Mark Alexander
Graduate Program:
Electrical Engineering
Master of Science
Document Type:
Master Thesis
Date of Defense:
July 24, 2015
Committee Members:
  • Ram Mohan Narayanan, Thesis Advisor
  • radar
  • tomography
A hardware system has been developed to perform ultrawideband (UWB) noise radar tomographic imaging over the 3–5 GHz frequency range. The system has been tested on a variety of target objects that have been concealed in both cardboard and wood. The system utilizes RF hardware to transmit multiple independent and identically distributed (iid) UWB random noise waveforms. A 3–5 GHz band-limited signal is generated using an arbitrary waveform generator and the waveform is then amplified and transmitted through a horn antenna. A linear scanner with a single antenna is used in place of an antenna array to collect backscatter. The backscattered data are collected from the transmission of each waveform and reconstructed to form an image. The images that result from each scan are averaged to produce a single tomographic image of the target. After background subtraction, the scans are averaged to improve the image quality. The experimental results are compared to the theoretical predictions. The system is able to successfully image metallic and dielectric cylinders of different cross sections.