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Beam-based time reversal imaging

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3 Author(s)
Heilpern, T. ; Sch. of Electr. Eng., Tel Aviv Univ., Tel Aviv, Israel ; Shlivinski, A. ; Heyman, E.

We present a beam-based time reversal (TR) imaging scheme for point scatterers, utilizing data measured by arrays of wide-angle sources and receivers. The scheme starts with a pre-processing phase where the sources/receivers arrays are divided into sub-arrays, and the field of each sub-array is transformed using a discrete Fourier transform (DFT) into a set of directional beams. This converts the wide-angle transducers data into the beam-domain data, describing the amplitudes of the scattered beams due to each excitation beam. The beam-domain time-reversal processing phase is formulated next. It is shown that the beam-domain TR operator is sparse and low rank for a given sub-domain of interest in the target domain.

Published in:

Electrical and Electronics Engineers in Israel, 2008. IEEEI 2008. IEEE 25th Convention of

Date of Conference:

3-5 Dec. 2008