The E-Pulse Technique for Dispersive Scatterers

  • S. Primak
  • J. LoVetri
  • Z. Damjanschitz
  • S. Kashyap

Abstract

The E-pulse radar target discrimination scheme, employed in the frequency domain to extract aspect dependent information about targets was recently presented by Rothwell et al.1 This approach assumes that the scattering response is approximated by the model of point scatterers, and consequently can be represented in frequency domain as a sum of complex exponents. Further investigation2–5 has shown that the scattering mechanism is more complicated and is better modelled by an exponential expansion with polynomial coefficients. This dispersive property of the scattering response is found in many real situations and motivates the adaptation of E-pulse based discrimination schemes to this type of target. Here we present procedures, both for the construction of the E-pulses and the extraction of the scattering features from the measured data. This algorithm will be applied to angle discrimination of an open-ended rectangular cavity in which the scattering response was obtained via frequency domain measurements ant to a fin structure in which the scattering response was obtained directly in the time domain using the FDTD technique.

Keywords

Frequency Domain Measurement Frequency Domain Response Scatter Response Angle Discrimination Bistatic Angle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    E. J. Rothwell, K.M. Chen, D.P. Nyquist, P. Bavarasan, J. E. Ross, R. Bebermeyer, and Q. Li, A general E-Pulse scheme arising from the dual early-time/late-time behavior of radar scatteres, IEEE Trans. on Ant. and Prop., vol. 42, no. 9, pp. 1336–1341, September (1994).Google Scholar
  2. 2.
    J. Moore, and H. Ling, Super-resolved time-frequency analysis of wideband backscattered data, IEEE Trans. on Ant and Prop, Vol. 42, No. 9, pp. 1336–1341, September (1994)Google Scholar
  3. 3.
    J. Moore, and H. Ling, Super-resolved time-frequency processing of surface-wave mechanism contained in wideband radar echo, Microwave and Optical Technology Letters, Vol. 9, No. 5, pp. 237–240, August (1995).Google Scholar
  4. 4.
    L. Carin, L.B. Felsen, D. Kralj, S.U. Pillai, and W.C. Lee, Dispersive modes in the time domain: analysis and time-frequency representation, IEEE Microwave and Guided Wave Letters, Vol. 4, No. 1, pp. 23–25, January (1994).Google Scholar
  5. 5.
    Q. Li, E.J. Rothwell, K.-M. Chen, and D.P. Nyquist, Scattering Center Analysis of Radar Targets Using Fitting Scheme and Genetic Algorithm, IEEE Trans. on Ant and Prop, Vol. 44, No. 2, pp. 198–207, Februar (1996).Google Scholar
  6. 6.
    R.A. Altes, Sonar for generalized target description and its similarity to animal echolocation system, J. Acoust. Soc. Amer., Vol. 59, pp. 97–105, January (1976).Google Scholar
  7. 7.
    R. Roy, A. Paulraj, and T. Kailath, ESPRIT–a subspace approach to estimation of parameters of cisoids in noise, IEEE Trans. on Acous., Speech and Sig. Proc., Vol. 34, No. 5, pp. 1340–1342, October (1986).Google Scholar
  8. 8.
    G.J. Burke, and A.J. Poggio, Numerical Electrical Code, Technical Document 116, Naval Electronic Systems Command, Naval Ocean Systems Center, San Diego, California, 18 July (1977).Google Scholar
  9. 9.
    K. S. Kunz, and R.J. Luebbers, The Finite Difference Time Domain Method for Electromagnetics, CRC Press, London, 1993.Google Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • S. Primak
    • 1
  • J. LoVetri
    • 2
  • Z. Damjanschitz
    • 2
  • S. Kashyap
    • 3
  1. 1.Department of Electrical and Computer EngineeringBen-Gurion University of the NegevBeer-ShevaIsrael
  2. 2.Department of Electrical EngineeringThe University of Western OntarioLondonCanada
  3. 3.Department of National DefenceDefence Research Establishment OttawaOttawaCanada

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