Practical Implications of Pole Series Convergence and the Early-time in Transient Backscatter

Abstract

Here we consider the convergence of the singularity expansion method (SEM) pole series representation of the transient backscatter in terms of the stability in the estimated poles from the time domain response. Using a numerically simulated backscattered response of a thin wire, the temporal progression of the estimated pole series is examined by iteratively estimating them (using the Matrix Pencil Method) at different time-window locations. The results show a good agreement with the well established SEM theory (i.e., a stable set of poles are obtained after the theoretically defined time for convergence). This iterative approach could allow for a more accurate estimation of the poles that represent the resonances of the object. We also consider the use of the ?non-converging? poles estimated in the early-time to approximately represent the early-time specular response.

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Document Details

Document Type
Technical Report
Publication Date
Apr 16, 2012
Accession Number
ADA559950

Entities

People

  • Sun K. Hong
  • Tim D. Andreadis
  • W. A. Davis
  • Walter S. Wall

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Counter IED

DTIC Thesaurus Topics

  • Abstracts
  • Backscattering
  • Boundaries
  • Convergence
  • Department Of Defense
  • Electrical Engineering
  • Electronic Warfare
  • Equations
  • Frequency
  • Information Operations
  • Military Research
  • Physical Properties
  • Resonance
  • Resonant Frequency
  • Scattering
  • Time Domain
  • Waves

Readers

  • Control Systems Engineering.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Plasma Physics / Magnetohydrodynamics