Adaptive Processing Experiment (APE) Phase II

Abstract

The impact of receiver passband phase and amplitude error on the RMS sidelobes of a digital beamforming system is analyzed. A method is developed whereby a digital transversal filter is used on the output of each receiver prior to beamforming to minimize the error in a LMS sense. The method is applied to an OTH radar system and results given. With a 16-tap filter the receivers error is reduced from -35 dB to -63 dB. Additionally, a method of calibrating an H. F. receive array by the use of a known near-field source is illustrated. Results are shown for the performance of the calibrated array against OTH sources using conventional and adaptive beamforming techniques. Discrimination of better than 40 dB is illustrated for an OTH signal source 2000 miles from the array. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1976
Accession Number
ADA027071

Entities

People

  • A. Katz
  • B. Whitehead
  • J. Mallett
  • Jennifer M. Bailey
  • T. Boak

Organizations

  • Technology Service Corporation

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Bandwidth
  • Broadband
  • Computer Programs
  • Computers
  • Data Processing
  • Data Sets
  • Frequency
  • Frequency Bands
  • Governments
  • Information Science
  • Operating Systems
  • Over The Horizon Radar
  • Plane Waves
  • Radar
  • Two Dimensional
  • Weighting Functions

Fields of Study

  • Engineering

Readers

  • Radar Systems Engineering.
  • Radio communications and signal processing.