GPU-Accelerated Shooting and Bouncing Ray Method for Inverse Synthetic Aperture Radar Imaging
- Resource Type
- Conference
- Authors
- Bural, Berk; Ozgun, Ozlem; Yilmaz, Asim Egemen; Kuzuoglu, Mustafa
- Source
- 2022 32nd International Conference Radioelektronika (RADIOELEKTRONIKA) Radioelektronika (RADIOELEKTRONIKA), 2022 32nd International Conference. :01-04 Apr, 2022
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Robotics and Control Systems
Signal Processing and Analysis
Three-dimensional displays
Surface waves
Computational modeling
Octrees
Software algorithms
Graphics processing units
Ray tracing
Shooting and Bouncing Ray
octree decomposition
GPU programming
Inverse Synthetic Aperture Radar imaging
- Language
The most time-consuming part of the conventional Shooting and Bouncing Ray (SBR) method is the ray tracing process, which increases the computation time because of the large number of ray tubes used to model the incident wave and the large number of triangles used to model the surface mesh. In this study, an accelerated SBR method is presented to reduce the computational burden. Acceleration is done both by reducing the amount of ray-triangle intersection tests with the help of octree decomposition of 3D mesh structure, and by parallelizing the ray tracing algorithm on GPU (graphics processing unit) in MATLAB. The proposed method is used to obtain the Inverse Synthetic Aperture Radar (ISAR) image of electrically-large complex objects. The numerical results are compared with those of a commercial software.