Digital Transmission Evaluation Project MW-518 (QPSK) Test.

Abstract

The Collins Radio MW-518 (QPSK) digital radio was tested in back-to-back configuration for determination of transfer parameters to isolate propagation effects in link testing and the development of standard test techniques. The radio has a maximum propagation rate of 19.804 Mb/s (288 voice channels) at 8.11 GHz and other rates selection of 12.553 Mb/s, 6.276 Mb/s, and 1.544 Mb/s. BER vs RSL characteristics are displayed and analyzed as the primary mode of equipment evaluation. Carrier to interference data, T-1 line tests and theoretical predictions are compared. Frequency stability, quantizing distoration, crosstalk, orderwire, signal to noise ratio, and data rate variations are measured and presented. Power Spectra are displayed and compared to FCC requirements. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 15, 1974
Accession Number
ADA035769

Entities

People

  • David M. Laida
  • Edward F. New
  • Harold F. Bower
  • John C. Tyler

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Automatic Gain Control
  • Co-Channel Interference
  • Data Rate
  • Detection
  • Detectors
  • Filtration
  • Frequency
  • Measurement
  • Modulation
  • Operating Systems
  • Power Spectra
  • Radio Equipment
  • Radio Frequency Filters
  • Spectra
  • Test And Evaluation
  • Test Equipment

Fields of Study

  • Physics

Readers

  • Radio communications and signal processing.