A FPGA ray tracing scheme with memory optimization facility

Huang, Wei; Gen, Wan Wang

doi:10.1049/cp.2011.0903

Cited by 1 publication

(1 citation statement)

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“…In the SBR method, the intersection tests are quite time-consuming especially as the target size increasing. Many acceleration techniques, such as ray-box intersection algorithm in FPGA [13,14], multiresolution grid algorithm [15], recursive subdivision octree algorithm [16], and KD-tree based algorithm [17], have been developed to reduce the computation time of ray-tracing process. In this report, the bidirectional ray-tracing algorithm is proposed to decrease the intersection tests between patches and rays, further reducing computation time.…”

Section: Introductionmentioning

confidence: 99%

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

Feng

Guo

2021

International Journal of Antennas and Propagation

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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.

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