The Study of Adaptive Beamforming Detection Performance on ALPA (Alaskan Long-Period Array) Interfering Events

Abstract

The report presents the results obtained from applying a time-domain maximum likelihood adaptive-beamforming processor to simulated mixed-event data from the Alaskan Long-Period Array. Adaptive-beamforming detection threshold reduction with respect to the beamsteer threshold is investigated as two parameters are varied: the time separation between Rayleigh-wave arrivals, and the azimuthal separation between the events. In the simulation performed for this report, the arrival time of a signal buried in a stronger off-azimuth interfering event has little effect on the 11 dB ABF threshold reduction obtained, but the threshold reduction is strongly dependent on the azimuthal separation between the events.

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Document Details

Document Type
Technical Report
Publication Date
Jul 28, 1975
Accession Number
ADA017380

Entities

People

  • Wen-wu Shen

Organizations

  • Texas Instruments

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adaptive Filters
  • Air Force
  • Beam Steering
  • Degradation
  • Detection
  • Detectors
  • Filters
  • Filtration
  • Frequency
  • Geometry
  • Measurement
  • Plane Waves
  • Test And Evaluation
  • Three Dimensional
  • Two Dimensional
  • Wave Propagation
  • Waves

Fields of Study

  • Engineering

Readers

  • Phased Array Antenna Design.
  • Seismology