Microwave imaging with noise waveforms using FDTD time reversal method

This article presents a microwave imaging method based on the time‐reversed finite‐difference time‐domain method (FDTD‐TR) that enhances immunity to undesired interference and jamming signals. The method uses random noise as the source waveform that illuminates the imaging area. Signals scattered by...

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Bibliographic Details
Published in:Microwave and optical technology letters 2018-05, Vol.60 (5), p.1275-1280
Main Authors: AlAjmi, Ayed R., Saed, Mohammad A.
Format: Article
Language:English
Subjects:
FDTD time reversal
Finite difference time domain method
Image reconstruction
Immunity
Interference
Jamming
microwave imaging
Noise
noise radar
Random noise
Waveforms
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Summary:This article presents a microwave imaging method based on the time‐reversed finite‐difference time‐domain method (FDTD‐TR) that enhances immunity to undesired interference and jamming signals. The method uses random noise as the source waveform that illuminates the imaging area. Signals scattered by objects in the imaging area are collected on a planar grid, followed by processing through a correlation operation, and then used in the FDTD‐TR algorithm to construct images on any desired plane in the computational domain. The method capability in suppressing interference noise is demonstrated through successful reconstruction of images for a test case consisting of a dielectric object behind a wall. The method is compared to conventional FDTD‐TR methods that fail the same image reconstruction test.
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.31148