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Optical Engineering

Design, performance, and applications of a coherent ultra-wideband random noise radar
Author(s): Ram Mohan Narayanan; Yi Xu; Paul D. Hoffmeyer; John O. Curtis
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Paper Abstract

A novel coherent ultra-wideband radar system operating in the 1- to 2-GHz frequency range has been developed recently at the University of Nebraska. The radar system transmits white Gaussian noise. Detection and localization of buried objects is accomplished by correlating the reflected waveform with a time-delayed replica of the transmitted waveform. Broadband dual-polarized log-periodic antennas are used for transmission and reception. A unique signal-processing scheme is used to inject coherence into the system by frequency translation of the ultrawideband signal by a coherent 160-MHz phase-locked source prior to performing heterodyne correlation. The system coherence allows the extraction of a target’s polarimetric amplitude and phase characteristics. This paper describes the unique design features of the radar system, develops the theoretical foundations of noise polarimetry, provides experimental evidence of the polarimetric and resolution capabilities of the system, and demonstrates results obtained in subsurface probing applications.

Paper Details

Date Published: 1 June 1998
PDF: 15 pages
Opt. Eng. 37(6) doi: 10.1117/1.601699
Published in: Optical Engineering Volume 37, Issue 6
Show Author Affiliations
Ram Mohan Narayanan, Univ. of Nebraska/Lincoln (United States)
Yi Xu, Univ. of Nebraska/Lincoln (United States)
Paul D. Hoffmeyer, Univ. of Nebraska/Lincoln (United States)
John O. Curtis, U.S. Army Waterways Experiment Station (United States)

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