Journal of Electronic Science and Technology, Volume. 22, Issue 2, 100257(2024)
Electromagnetic scattering and imaging simulation of extremely large-scale sea-ship scene based on GPU parallel technology
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Fig. 3. Scaled ship on sea and its radar cross section comparison results: (a) model of scaled ship on sea, (b) vertical-vertical, and (c) horizontal-horizontal.
Fig. 5. RCS results at pitch angles and sea scenes: (a) 400 m×400 m sea and (b) 800 m×800 m sea.
Fig. 6. Comparison of ship imaging at different sea states and angles: (a) calm sea with a grazing angle of 40°, (b) calm sea with a grazing angle of 20°, (c) level 1 sea with a grazing angle of 40°, (d) level 1 sea with a grazing angle of 20°, (e) level 2 sea with a grazing angle of 40°, and (f) level 2 sea with a grazing angle of 20°.
Table 1. Time consumptions at different sea scenes.
View tableView in ArticleTable 1. Time consumptions at different sea scenes.
Sea surface size (m2) Single GPU (s) Dual GPUs (s) Speedup ratio (%) 400×400 264.3 133.5 198 800×800 1179.6 575.6 205
Table 2. Basic parameters of radar imaging.
View tableView in ArticleTable 2. Basic parameters of radar imaging.
Parameters Values Target size (m) 118×18×14 (L×W×H) Sea size (m2) 300×300 Resolution ( $ \Delta x{\mathrm{,}}\;\Delta y $ ) (m)(0.75, 0.75) Polarization HH Grazing angles (°) 40, 20 Azimuth angle (°) 0, 90 Bandwidth $ \left(B\right) $ (GHz)9.9−10.1 Number of frequency points 400 Rotation angle $ \left(\beta \right) $ (°)5 Number of azimuth angle points 400
Table 3. Averaged PSNRs at different sea states.
View tableView in ArticleTable 3. Averaged PSNRs at different sea states.
Sea states (dB) Grazing angle of 40° Grazing angle of 20° Calm 35.84223 29.19082 Level 1 26.81253 25.28394 Level 2 25.08222 24.32826
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Cheng-Wei Zhang, Zhi-Qin Zhao, Wei Yang, Li-Lai Zhou, Hai-Yu Zhu. Electromagnetic scattering and imaging simulation of extremely large-scale sea-ship scene based on GPU parallel technology[J]. Journal of Electronic Science and Technology, 2024, 22(2): 100257
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Received: Nov. 6, 2023
Accepted: May. 8, 2024
Published Online: Aug. 8, 2024
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