Time Reversal Imaging by Adaptive Interference Canceling

Authors:
J.M.F. Moura;Yuanwei Jin
Affiliations:
Dept. of Electr. &Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA;-
Venue:
IEEE Transactions on Signal Processing
Year:
2008

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Abstract

We develop the time reversal adaptive interference canceler (TRAIC) time reversal beamformer (TRBF), a new algorithm to detect and locate targets in rich scattering environments. It utilizes time reversal in two stages: (1) Anti-focusing: TRAIC time reverses and then reshapes the clutter backscatter to mitigate the clutter response; (2) Focusing: TRBF time reverses the residual backscatter to focus the radar image on the target. Laboratory experiments with electromagnetic radar data in a highly cluttered environment confirm the superiority of TRAIC-TRBF over conventional direct subtraction (DS) beamform imaging.