Direction Finding in the Presence of Complex Electro-Magnetic Environment.

Abstract

The effects of complex electromagnetic environment on high resolution direction finding algorithms is investigated. It is demonstrated that mutually compiling adversely affects the resolution capabilities of the MUSIC algorithm. A technique utilizing the terminal impedance matrix is devised to compensate for the mutual coupling effects. Simulation studies show the efficiency of this procedure. The effect of a near field scatterer on the performance of the MUSIC algorithm is also investigated.Interference power, as little as 15dB below the signal power from the near field scatterer greatly reduces.the resolution capabilities of the MUSIC algorithm. A new away configuration is devised to suppress the interference. Modification of the MUSIC algorithm to account for the change in the array configuration restores the performance of the MUSIC algorithm. Simulations carried out using an electromagnetic model of the array and an edge type near field scatterer demonstrate the validity of the technique.

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Document Details

Document Type
Technical Report
Publication Date
Jun 29, 1995
Accession Number
ADA296710

Entities

People

  • Edward M. Friel
  • Krishna M. Pasala

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Algorithms
  • Angle Of Arrival
  • Angle Of Incidence
  • Computer Programs
  • Diffraction
  • Direction Finding
  • Environment
  • Far Field
  • Frequency Bands
  • Frequency Response
  • Geometry
  • Integral Equations
  • Near Field
  • Radiation Patterns
  • Scattering
  • Simulations
  • Spectra

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Agent-Based Social Robotics and Mobile-Assisted Learning in Virtual Environments.
  • Image Processing and Computer Vision.