Memory-efficient multilevel physical optics algorithm for fast computation of scattering from three-dimensional complex targets

Date
2007
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Source Title
Proceedings of the Computational Electromagnetics Workshop, IEEE 2007
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Publisher
IEEE
Volume
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Pages
26 - 30
Language
English
Type
Conference Paper
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Abstract

Multilevel physical optics (MLPO) algorithm provides a speed-up for computing the physical-optics integral over complex bodies for a range of aspect angles and frequencies. On the other hand, when computation of the RCS pattern as a function of θ, φ, and frequency is desired, the O N3 memory complexity of the algorithm may prevent the solution of electrically large problems. In this paper, we propose an improved version of the MLPO algorithm, for which the memory complexity is reduced to O N2 log N . The algorithm is based on the aggregation of only some portion of the scattering patterns at each aggregation step. This way, memory growth in each step is prevented, and a significant amount of saving is achieved.

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Keywords
Aircraft, Boolean functions, Electromagnetism, Function evaluation, Magnetism, Optics, Aspect angles, Complex bodies, Complex targets, Computational electromagnetics (CEM), Fast computations, Speed ups, Three dimensional (3D), Physical optics
Citation
Published Version (Please cite this version)