An Adaptive Array with Automatic Gain Control.

Abstract

A three-element adaptive array algorithm with Applebaum-Howells loops combined with a linear automatic gain control (AGC), was analyzed. Computer simulations of array performance for signal jammers were presented and analyzed. Jammer scenarios included were: narrowband and broadband, high power, centered and non-centered jammers about the array center frequency, and different automatic gain control response times. No fixed performance criteria were applied to SNR degradation and antenna pattern plots. A non-linear AGC was linearized by expanding the exponential attenuation function in a series and truncating the higher-order terms. The AGC is shown to destroy the typical monotonically decreasing SNR degradation of a constant power, narrow band jammer when its response time is near that of the adaptive loop. Simulation results show that an AGC can cause the adaptive weight amplitudes to vary significantly. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA080374

Entities

People

  • John Rogers Sutton

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Algorithms
  • Amplifiers
  • Antenna Arrays
  • Automatic Gain Control
  • Bandwidth
  • Beam Steering
  • Cross Correlation
  • Differential Equations
  • Dynamic Range
  • Eigenvalues
  • Electrical Engineering
  • Equations
  • Frequency
  • Simulations
  • Spectra
  • Spectral Lines
  • Steady State

Fields of Study

  • Engineering

Readers

  • Acoustics.
  • Control Systems Engineering.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering