Continuous Wavelet Transform Based Frequency Dispersion Compensation Method for Electromagnetic Time-Reversal Imaging

Ammar Abduljabbar, Mehmet E. Yavuz, Fumie Costen, Ryutaro Himeno, Hideo Yokota

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    Abstract

    The invariance of wave equations in lossless media allows the Time Reversal (TR) technique to spatio-temporally refocus back-propagated signals in a given ultrawideband imaging scenario. However, the existence of dispersion and loss in the propagation medium breaks this invariance and the resultant TR focusing exhibits frequency and propagation duration dependent degradation. We propose an algorithm based on the continuous wavelet transform that tackles this degradation to improve focusing resolution under such conditions. The developed algorithm has been successfully applied to the scenario for localization of lung cancer.
    Original languageEnglish
    Pages (from-to)1321-1329
    Number of pages9
    JournalIEEE Transactions on Antennas and Propagation
    Volume65
    Issue number3
    Early online date4 Jan 2017
    DOIs
    Publication statusPublished - 4 Jan 2017

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