TY - GEN
T1 - Anisotropic Scatterer Models for Representing RCS of Complex Objects
AU - Huang, Eric
AU - Delude, Coleman
AU - Romberg, Justin
AU - Mukhopadhyay, Saibal
AU - Swaminathan, Madhavan
N1 - Funding Information:
This material is based upon work supported by the Defense Advanced Research Projects Agency (DARPA) and Naval Information Warfare Center Pacific (NIWC Pacific) under Contract No. N66001-20-C-4001. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of DARPA or NIWC Pacific.
Publisher Copyright:
© 2021 IEEE.
PY - 2021/5/7
Y1 - 2021/5/7
N2 - The need to simulate complex electromagnetic (EM) wave interactions by multiple radar targets, transmitters, and receivers to better study the performance of radar systems, antenna designs, and/or stealth technologies has grown over time. High performance computing (HPC) based emulators can be used to model the scattering from multiple stationary and moving targets for radar applications. These emulators rely on the Radar Cross Section (RCS) of the targets being available in complex scenarios. Representing the RCS using tables generated from EM simulations is often times cumbersome leading to large storage requirement. An alternative approach is to represent the targets as a collection of isotropic or anisotropic scatterers. In this paper we present a method to represent the RCS of complex targets using a 3D anisotropic scatterer model, where we use the analytical RCS representation of a large ellipsoid as the basis function to determine the angular dependency of the RCS from each scatterer. The scatterer model that best represents the RCS data is obtained by solving a least square inverse problem. To improve the correlation with EM solvers, we further break down the optimization problem by considering shadowing effect and use multiple models, each representing a subset of the RCS data. The results show that the scatterer model can effectively represent the RCS data of complex targets.
AB - The need to simulate complex electromagnetic (EM) wave interactions by multiple radar targets, transmitters, and receivers to better study the performance of radar systems, antenna designs, and/or stealth technologies has grown over time. High performance computing (HPC) based emulators can be used to model the scattering from multiple stationary and moving targets for radar applications. These emulators rely on the Radar Cross Section (RCS) of the targets being available in complex scenarios. Representing the RCS using tables generated from EM simulations is often times cumbersome leading to large storage requirement. An alternative approach is to represent the targets as a collection of isotropic or anisotropic scatterers. In this paper we present a method to represent the RCS of complex targets using a 3D anisotropic scatterer model, where we use the analytical RCS representation of a large ellipsoid as the basis function to determine the angular dependency of the RCS from each scatterer. The scatterer model that best represents the RCS data is obtained by solving a least square inverse problem. To improve the correlation with EM solvers, we further break down the optimization problem by considering shadowing effect and use multiple models, each representing a subset of the RCS data. The results show that the scatterer model can effectively represent the RCS data of complex targets.
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U2 - 10.1109/RadarConf2147009.2021.9455200
DO - 10.1109/RadarConf2147009.2021.9455200
M3 - Conference contribution
AN - SCOPUS:85112425520
T3 - IEEE National Radar Conference - Proceedings
BT - 2021 IEEE Radar Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE Radar Conference, RadarConf 2021
Y2 - 8 May 2021 through 14 May 2021
ER -