An Improved Backward SBR-PO/PTD Hybrid Method for the Backward Scattering Prediction of an Electrically Large Target

Tieshuan, Fan; Guo, Lixin; Lv, Bo; Liu, Wei

doi:10.1109/lawp.2015.2456031

Cited by 69 publications

(16 citation statements)

References 13 publications

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“…Its computation for a realistic object requires high computational resources. High-frequency asymptotic techniques like Geometrical Optics, Physical Optics [2], Geometrical Theory of Diffraction, Physical Theory of Diffraction, and Ray tracing methods [3][4][5][6][7] are the few examples for faster RCS computation. These methods are faster but problem dependent.…”

Section: Introductionmentioning

confidence: 99%

RCS Calculation Using Hybrid FDTD-Narx Technique

Sahoo¹,

Panda²,

Misra³

et al. 2019

PIER M

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This paper amalgamates two uncorrelated techniques namely finite difference time domain technique (FDTD) and nonlinear autoregressive with exogenous input (NARX) neural network to achieve a faster computation of radar cross section (RCS). It generates only a limited number of FDTD data and uses them to train a NARX neural network. The data beyond this limited number for the FDTD come from the NARX prediction. Comparison of the performance of FDTD-NARX hybrid with other methods indicates good matching with better timing for RCS of electrically larger objects.

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Section: Introductionmentioning

confidence: 99%

RCS Calculation Using Hybrid FDTD-Narx Technique

Sahoo¹,

Panda²,

Misra³

et al. 2019

PIER M

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show abstract

“…Tao proposed a GPU‐based SBR that can rapidly evaluate the exit position in a single pass on the graphics processing unit (GPU). Based on the forward‐ray‐tracing technique, Fan proposed an improved backward SBR‐PO/PTD hybrid method to accelerate the original backward‐ray‐tracing one. Zou introduced a ray‐density normalization theory to improve the SBR method.…”

Section: Introductionmentioning

confidence: 99%

A high precision shooting and bouncing rays method without mesh for scattering calculation of complex target

2019

Int J Numerical Modelling

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To extend the application of shooting and bouncing rays (SBR) method in the penetration structure and further improve the calculation accuracy, an improved mesh free SBR method that completely implements ray‐tracing and electromagnetic computing in 3‐D geometrical modeling software is proposed. The basic idea is to combine the non‐uniform rational b‐splines (NURBS) surface modeling function and open application programming interface (Open API) to implement the process of mesh free ray tracing, which greatly improve calculation accuracy and efficiency of SBR. Based on this, the improved SBR method can yield a superior performance for scattering analysis of complex targets, especially at the problem where reflected and transmitted waves exist simultaneously in a target. The numerical results demonstrate that the improved SBR is highly effective in computing scattering fields of complex targets.

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“…In the simulator, a semideterministic facet model with two-scale formulas [13,14] is employed to describe the scattering from the electrically very large sea surface. A fast bidirectional ray tracing method [15] combined with the KD-tree [16] acceleration technique is employed to describe the interactions among the target and sea facets, which can keep both the accuracy and the efficiency in the ray tracing process. An equivalent edge current (EEC) method is used as a modification to consider the diffraction field contributions from the edged structures.…”

Section: Introductionmentioning

confidence: 99%

A New Shooting Bouncing Ray Method for Composite Scattering from a Target above the Electrically Large Scope Sea Surface

Peng

Guo

2017

Mathematical Problems in Engineering

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A new shooting and bouncing ray (SBR) simulator based on the hybrid scheme of GO/PO/SDFM/EEC method is developed for the accurate prediction of composite scattering from a low altitude target above the electrically very-large-scale sea surface. It can adequately deal with the complex local electromagnetic interactions between the target and the large scope sea surface. The method is compared with the exact computational electromagnetic solver FEKO-MLFMM to validate its accuracy and efficiency. Then, it is applied to simulate the bistatic and monostatic scattering characteristics of an airplane above the electrically large sea surface at X-band, for different sea states. The results reveal the contributions from the target, sea surface, and interactions, which are of significance for radar target detection and remote sensing in real maritime environments.

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An Improved Backward SBR-PO/PTD Hybrid Method for the Backward Scattering Prediction of an Electrically Large Target

Cited by 69 publications

References 13 publications

RCS Calculation Using Hybrid FDTD-Narx Technique

RCS Calculation Using Hybrid FDTD-Narx Technique

A high precision shooting and bouncing rays method without mesh for scattering calculation of complex target

A New Shooting Bouncing Ray Method for Composite Scattering from a Target above the Electrically Large Scope Sea Surface

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