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

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      Author
      Manyas, Alp
      Gürel, Levent
      Date
      2007
      Source Title
      Proceedings of the Computational Electromagnetics Workshop, IEEE 2007
      Publisher
      IEEE
      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.
      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
      Permalink
      http://hdl.handle.net/11693/26996
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/CEM.2007.4387646
      Collections
      • Computational Electromagnetics Research Center 71
      • Department of Electrical and Electronics Engineering 3337

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