Anti-Jamming Optical Beam Nuller.

Abstract

The development of an Acousto-optic (AO) based anti-jamming optical beam nuller (AJOB),including laboratory and live radar tests, is presented. The purpose of the AJOB system is the cancellation of multipath jamming interference in advanced surveillance radars. AJOB is a multichannel adaptive optical system which performs cancellation of multiple wideband (10 MBz) interference sources in the presence of multipath. The live radar test consisted of using a downconverted 80 MHz received signal from the main and subarrays of a C-band radar to correlate jamming signals produced by stationary jammers. The correlation parameters fed a tapped delay line filter to form an estimate of the noise, which was subtracted from the main antenna signal. For the scenarios tested, the long integration time for the correlation data provided accurate estimates of the jammer delays, and therefore single-step convergence was achieved.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1996
Accession Number
ADA310906

Entities

People

  • Jeffrey M. Lutsko
  • Michael E. Turbyfill

Organizations

  • Rome Laboratory

Tags

DTIC Thesaurus Topics

  • C Band
  • Cancellation
  • Convergence
  • Delay Lines
  • Multichannel
  • Radar
  • Stationary
  • Surveillance
  • Surveillance Radar

Fields of Study

  • Engineering

Readers

  • Optical Physics and Photonics.
  • Phased Array Antenna Design.
  • Radar Systems Engineering.