Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-050307-142829


Document Typedissertation
Author NameHoll, Jr., David J.
Email Address david at ad5ey.net
URNetd-050307-142829
TitleState-Space Approaches to Ultra-Wideband Doppler Processing
DegreePhD
DepartmentElectrical & Computer Engineering
Advisors
  • David Cyganski, Advisor
  • Homer Walker, Committee Member
  • Kevin Clements, Committee Member
  • Keywords
  • state-space
  • super resolution
  • Doppler
  • direction of arrival
  • DoA
  • singular value
  • SVD
  • DSS
  • Date of Presentation/Defense2007-04-27
    Availability unrestricted

    Abstract

    National security needs dictate the development of new radar systems capable of identifying and tracking exoatmospheric threats to aid our defense. These new radar systems feature reduced noise floors, electronic beam steering, and ultra-wide bandwidths, all of which facilitate threat discrimination. However, in order to identify missile attributes such as RF reflectivity, distance, and velocity, many existing processing algorithms rely upon narrow bandwidth assumptions that break down with increased signal bandwidth.

    We present a fresh investigation into these algorithms for removing bandwidth limitations and propose novel state-space and direct-data factoring formulations such as

    * the multidimensional extension to the Eigensystem Realization Algorithm,

    * employing state-space models in place of interpolation to obtain a form which admits a separation and isolation of solution components,

    * and side-stepping the joint diagonalization of state transition matrices, which commonly plagues methods like multidimensional ESPRIT.

    We then benchmark our approaches and relate the outcomes to the Cramer-Rao bound for the case of one and two adjacent reflectors to validate their conceptual design and identify those techniques that compare favorably to or improve upon existing practices.

    Files
  • dholl_dissertation.pdf

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