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Proceedings Paper

Passive imaging of moving targets using distributed apertures in multiple-scattering environments
Author(s): Ling Wang; Birsen Yazici
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Paper Abstract

We present a novel passive image formation method for moving targets using distributed apertures capable of exploiting information about multiple-scattering in the environment. We assume that the environment is illuminated by non-cooperative transmitters of opportunity with unknown location and unknown transmitted waveforms. We develop a passive measurement model that relates the scattered field from moving targets at a given receiver to the scattered field at other receivers. We formulate the passive imaging problem as a generalized likelihood ratio test for a hypothetical target located at an unknown position, moving with an unknown velocity. We design a linear discriminant functional by maximizing the Signal-to-Noise Ratio (SNR) of the test-statistic, and use the resulting position- and velocity-resolved test-statistic to form the image. Our imaging method can determine the two- or three-dimensional velocity vector as well as the two- or three-dimensional position vector of a moving target without the knowledge of transmitter locations and transmitted waveforms. We present numerical experiments to demonstrate the performance of our passive imaging method operating in multiplescattering environments. The results show that the point spread function of the reconstructed images improves when the information about multiple scattering is exploited.

Paper Details

Date Published: 4 May 2011
PDF: 12 pages
Proc. SPIE 8051, Algorithms for Synthetic Aperture Radar Imagery XVIII, 80510U (4 May 2011); doi: 10.1117/12.883828
Show Author Affiliations
Ling Wang, Nanjing Univ. of Aeronautics and Astronautics (China)
Birsen Yazici, Rensselaer Polytechnic Institute (United States)

Published in SPIE Proceedings Vol. 8051:
Algorithms for Synthetic Aperture Radar Imagery XVIII
Edmund G. Zelnio; Frederick D. Garber, Editor(s)

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