Publications [#338935] of Lawrence Carin

Papers Published

1. Liu, D; Kang, G; Li, L; Chen, Y; Vasudevan, S; Joines, W; Liu, QH; Krolik, J; Carin, L, Electromagnetic time-reversal imaging of a target in a cluttered environment, IEEE Transactions on Antennas and Propagation, vol. 53 no. 9 (2005), pp. 3058-3066, Institute of Electrical and Electronics Engineers (IEEE) [TAP.2005.854563], [doi]
   (last updated on 2024/12/31)

   Abstract:
   Electromagnetic time-reversal imaging is addressed for a target situated in a cluttered background. We first investigate the theory of electromagnetic time-reversal imaging, followed by an experimental demonstration. A transmitter-receiver antenna array is connected to a network analyzer and applied to transmit wideband waveforms for detecting a target within a cluttered environment. We assume the cluttered background is fixed, thus the target signature is extracted by observing changes manifested by the introduction of a target. A numerical algorithm is required for computation of the Green's function employed within the time-reversal imager, with this implemented here via ray tracing. Example time-reversal images of different cluttered backgrounds and different targets are presented using measured data, with comparisons to a traditional radar imaging technique. Results show that the time-reversal imagery yields good focusing at the target, significantly better than when the background is not accounted for. © 2005 IEEE.

   Keywords:
   Imaging techniques;Electromagnetic wave propagation;Transceivers;Antenna arrays;Electromagnetic wave scattering;Algorithms;Green's function;Radar imaging;