SAR Image Simulation Based on Effective View and Ray Tracing

We present a novel echo-based synthetic aperture radar (SAR) image simulation method that comprehensively utilizes both SAR effective view and ray tracing algorithms. To improve the fidelity of simulated SAR images, we first design an SAR effective view algorithm to process the selected facet target...

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Bibliographic Details
Published inRemote sensing (Basel, Switzerland) Vol. 14; no. 22; p. 5754
Main Authors Wu, Ke, Jin, Guowang, Xiong, Xin, Zhang, Hongmin, Wang, Limei
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2022
Subjects
Algorithms
Automotive bodies
Backscattering
Design
Doppler effect
echo signal
Material properties
Methods
Radar imaging
Ray tracing
Remote sensing
SAR effective view
SAR image simulation
Signal processing
Simulation
Synthetic aperture radar
Systems development
Time domain analysis
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Summary:We present a novel echo-based synthetic aperture radar (SAR) image simulation method that comprehensively utilizes both SAR effective view and ray tracing algorithms. To improve the fidelity of simulated SAR images, we first design an SAR effective view algorithm to process the selected facet target model, with the purpose of discretizing the facets in the SAR effective view into lattice targets and ensuring that the interval of lattice targets is set strictly following the Nyquist sampling law. Then, we combine the ray tracing algorithm and SAR echo time-domain simulation and perform SAR echo time-domain simulation of lattice targets based on ray tracing. Various kinds of backscatter coefficient for each point target can be recorded, corresponding to the number of transmitted pulses within the synthetic aperture time. The echo matrixes of lattice targets are superimposed to generate the raw echo signal. Finally, the raw echo signal is processed by using the range-Doppler (RD) imaging algorithm to obtain the simulated SAR image. We conducted SAR image simulation tests on several facet target models, including car body, assault boat, and airplane, with different material properties. The simulated SAR images obtained by the proposed method were qualitatively and quantitatively evaluated. The experimental results verify the effectiveness of the proposed method.
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content type line 14
ISSN:2072-4292
2072-4292
DOI:10.3390/rs14225754