Multiview ISAR Imaging for Complex Targets Based on Improved SBR Scattering Model

A novel multiview inverse synthetic aperture radar (ISAR) imaging method is proposed to simulate high-resolution and identifiable ISAR image of complex targets by handling large-angle and wide-bandwidth scattering data. The scattering data are simulated with the shooting and bouncing ray (SBR) metho...

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Bibliographic Details
Published in:International journal of antennas and propagation 2021, Vol.2021, p.1-10
Main Authors: Feng, Tiantian, Guo, Lixin
Format: Article
Language:English
Subjects:
Algorithms
Automatic target recognition
Bandwidths
Coordinates
Data simulation
High resolution
Image processing
Image resolution
Inverse synthetic aperture radar
Methods
Object recognition
Radar imaging
Ray tracing
Scattering
Simulation
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Summary:A novel multiview inverse synthetic aperture radar (ISAR) imaging method is proposed to simulate high-resolution and identifiable ISAR image of complex targets by handling large-angle and wide-bandwidth scattering data. The scattering data are simulated with the shooting and bouncing ray (SBR) method. The bidirectional ray-tracing algorithm is developed to reduce the computation time. Simulation results indicate that the improved method is efficient and reliable to calculate electromagnetic (EM) scattering of electrically large targets. To implement the multiview ISAR imaging method after data simulation, we divide the large-angle and wide-bandwidth scattering data into subaperture data and conduct ISAR image processing for each subaperture datum locally. Transforming each subaperture ISAR image to the global coordinate system and summing them together will produce the high-resolution ISAR image that is meaningful for the database set up for synthetic aperture radar automatic target recognition (SAR ATR). The final simulation ISAR images further validate the great performance of our scattering calculation algorithm and ISAR imaging method.
ISSN:1687-5869
1687-5877
DOI:10.1155/2021/6615154