HF COMMUNICATION EFFECTS: PHASE-STABLE DATA REDUCTION TECHNIQUES AND SYSTEM TEST RESULTS

Abstract

Data-reduction techniques are discussed for a phase-stable CW system. An experiment was conducted in which signals were received at a site near Palo Alto over a transauroral path from Thule, Greenland and over a mid-latitude path from Fort Monmouth, New Jersey. Fixed-frequency, 7.366-Mc phase-stable data collected in analog form on magnetic tape during the field portion of the experiment were digitized and reduced on an IBM 7090 computer to plot form. Examples of distributions of amplitude, rate of change of amplitude, and rate of change of phase are presented. Power spectra of the received signal are shown. Several special tests were conducted to determine the resolution of the equipment and the results of these tests are discussed. Equipment limitations that must be considered in interpreting the data from the phase-stable system are pointed out.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0480293

Entities

People

  • B. C. Tupper
  • J. B. Lomax
  • R. A. Shepherd

Organizations

  • SRI International

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Calibration
  • Carrier Frequencies
  • Communication Systems
  • Computers
  • Conversion
  • Converters
  • Data Processing
  • Data Reduction
  • Doppler Effect
  • Frequency
  • Frequency Standards
  • Frequency Synthesizers
  • Magnetic Tape
  • Measurement
  • New Jersey
  • Power Spectra
  • Recording Systems

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Space/Atmospheric Physics.