Implementation of an efficient shooting and bouncing rays scheme

Abstract

Implementation of the shooting and bouncing rays (SBR) method for radar cross section or scattering center prediction of complex electrically large objects is studied with a focus on the computational efficiency. A triangulated CAD model is assumed and SBR is processed by a ray-triangle intersection algorithm. An octree space partitioning, which might be based on either rectangular boxes or spheres as bounding volumes, is used to speedup the intersection decision. The effect of proper implementation and choice of the bounding volume to reduce ''the constant in front'' of the leading order complexity is demonstrated. It is shown that the required computer resources can be reduced drastically using the techniques outlined in this article.

Mutual Coupling Effects for Radar Cross Section (RCS) of a Series-Fed Dipole Antenna Array

“…The literature available in the open domain presents several methods to estimate the antenna RCS. These include finite difference time domain (FDTD) method [6], shooting and bouncing ray (SBR) approach [7,8], physical optics (PO) based model [9], scattering matrix approach [10], method of moments [11,12], analytical formulation approach [13], and method of moments-particle swarm optimization (MoM-PSO) method [14].…”

Radar Cross Section Analysis of Large PEC Structures Using LBVH Traversal

“…이는 기존 BVH(bounding volume hierarchy)에 비해 균일한 품질을 기대할 수 있으며, 병렬 화에 유리하다 [2] . 이전 BVH 또는 K-D(K-Dimensional) tree, octree와 같은 기법을 활용한 레이다 단면적 연구는 일부 수행되었으나 [3]∼ [6] , LBVH 기법을 이용하여 레이다 단면적 계산에 활용한 연구는 부족한 실정이다.…”