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Second Time Integral of the Impulse Response for Enhancing the Late-Time Target Response for Target Identification

  • Carl E. Baum

A general problem, concerning target identification via the late-time aspectindependent complex natural resonant frequencies, is the presence of the large early-time response. It would be advantageous to enhance the late-time response relative to the early-time response. In a general sense this implies some kind of frequency-dependent filter which attenuates the high-frequency parts of the waveform while providing little or no attenuation to the complex resonant frequencies of interest. Such a low-pass filter (passive and/or active) is the subject of this paper.

A desirable feature of such a filter is the temporal separation of early and latetime responses. Furthermore we would like to be able to still use time gating (windowing) to remove some of the clutter in the signal returned to the radar. So we do not wish to introduce significant dispersion into the scattering data

There are other problems associated with the signal including the response(s) of the radar antenna(s) and propagation characteristics (e.g., multipath). For present purposes we neglect such problems and assume that appropriate deconvolution, gating, etc., have been applied to give the target delta-function response.

Keywords

Input Impedance Target Identification Matrix Pencil Time Gating Surface Current Density 
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.
    C. E. Baum, “Some Limiting Low-Frequency Characteristics of a Pulse-Radiating Antenna”, Sensor and Simulation Note 65, October 1968.Google Scholar
  2. 2.
    C. E. Baum, “Representation of Surface Current Density and Far Scattering in EEM and SEM With Entire Functions”, Interaction Note 486, February 1992; ch. 13, pp. 273-316, in P. P. Delsnato and A. W. Saenz (Eds.), New Perspectives on Problems in Classical and Quantum Physics, Part II, Acoustic Propagation and Scattering, Electromagnetic Scattering, Gordon and Breach, 1998.Google Scholar
  3. 3.
    E. M. Kennaugh and D. L. Moffatt, “Transient and Impulse Response Approximations”, Proc. IEEE, 1965, pp. 893-901.Google Scholar
  4. 4.
    C. E. Baum, “Correction of Time-Domain Data in Special Cases Where the Inverse Transfer Functions are Analytic Time-Domain Operators”, Mathematics Note 95, November 2003.Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Carl E. Baum
    • 1
  1. 1.Department of Electrical and Computer EngineeringUniversity of New MexicoAlbuquerqueUSA

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