A Model for the Extraction of Periodic Waveforms by Time Domain Averaging.

Abstract

It is shown that the existing comb filter model of time domain averaging does not correctly describe the extraction of periodic waveforms from additive noise using a digital computer because it assumes a knowledge of the signal over an infinite time and the result it produces is not exactly periodic. A revised model is presented which requires only a finite number of samples and which produces a result which is periodic. It is demonstrated that the rejection of periodic noise of a known frequency can be optimized by the selection of a suitable number of averages.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1986
Accession Number
ADA170688

Entities

People

  • P. D. Mcfadden

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Additives (Chemicals)
  • Aircraft Maintenance
  • Aircrafts
  • Comb Filters
  • Computers
  • Department Of Defense
  • Digital Computers
  • Engineering
  • Frequency
  • Frequency Domain
  • Materials Laboratories
  • Sidebands
  • Sine Waves
  • Spectra
  • Spectral Lines
  • Time Domain
  • Waveforms

Readers

  • Computational Modeling and Simulation
  • Phased Array Antenna Design.
  • Statistical inference.