Interference Cancellation in RF Signals Using Adaptive Array Techniques

Abstract

This study investigated the effectiveness of the Least Means Squared (LMS) algorithm against various types of common jammers. The LMS algorithm was implemented using the Block Oriented Systems Simulator (BOSS). The LMS algorithm was inserted at the output of a two element antenna array. The array was configured so as to have one-half wavelength spacing. A quadrature hybrid signal structure was used. The array was then tested against a barrage and sweep jammer. The barrage jammer testing consisted of varying each of the three available jammer parameters; power, frequency and angle of arrival individually. The sweep jammer testing consisted of varying each of the three available jammer parameters; power, sweep frequency and angle of arrival individually. The results of the simulation showed the LMS algorithm in combination with the quadrature hybrid was very effective against both the barrage and sweep jammers. It provided a 55 dB null in the barrage jammer cases and a 50 dB null in the sweep jammer case.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1990
Accession Number
ADA230587

Entities

People

  • Mark E. Brown

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adaptive Filters
  • Air Force
  • Aircrafts
  • Algorithms
  • Angle Of Arrival
  • Antenna Arrays
  • Communication Systems
  • Control Systems
  • Dynamic Range
  • Electrical Engineering
  • Electronic Equipment
  • Electronic Warfare
  • Estimators
  • Operating Systems
  • Signal Processing
  • Simulators
  • Warfare

Fields of Study

  • Engineering

Readers

  • Aerodynamics/Aeronautics.
  • Phased Array Antenna Design.

Technology Areas

  • Space