Nonlinear Spectral Analysis and Adaptive Array Superresolution Techniques.

Abstract

Two nonlinear spectral analysis techniques, the Burg maximum entropy method and the maximum likelihood method, are related to their similar nonlinear adaptive array antenna counterparts, which consist of the sidelobe canceller and directional gain constraint techniques. The comparison analysis permits an examination of their principles of operation from the antenna spatial pattern viewpoint, and helps to qualify their superresolution performance. The real-time adaptive resolution of two incoherent sources located within a beamwidth was simulated, and results are presented in the form of a universal superresolution curve over a SNR range of 0 to 40 dB. Two alternative adaptive spatial spectrum estimators are suggested, consisting of a circular array predicting to its center point, and a new 'thermal noise' algorithm. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1980
Accession Number
ADA083391

Entities

People

  • William F. Gabriel

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Antenna Arrays
  • Antennas
  • Beam Steering
  • Convergence
  • Directional
  • Eigenvalues
  • Estimators
  • Filters
  • Filtration
  • Frequency
  • Linear Arrays
  • Measurement
  • Simulations
  • Steering
  • Time Domain
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Phased Array Antenna Design.
  • Systems Analysis and Design
  • Wave Propagation and Nonlinear Chaotic Dynamics.