Design and Performance of a Spread Spectrum Data Communications System Using Delta Modulation with a Dithered Clock.

Abstract

Digital modulation schemes and spread spectrum techniques are of major importance in modern communications. This thesis investigates a delta modulation/demodulation scheme and direct sequence spreading of the digital data. The clock rate is dithered to enhance the low probability of intercept advantage of spread spectrum. The circuitry incorporates small and medium scale integrated circuits. Experimental results are presented in some detail. Good quality voice and music were recovered using a fixed bit rate as low as 10 kbits/sec and a clock dither range of 40%. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1978
Accession Number
ADA066358

Entities

People

  • Evangelos Vassilios Pappas
  • James Harvey Hoffman

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bipolar Junction Transistors
  • Circuit Analysis
  • Communication Systems
  • Delta Modulation
  • Digital Communications
  • Digital Data
  • Electrical Engineering
  • Engineering
  • Frequency
  • Frequency Shift
  • Generators
  • Integrated Circuits
  • Modulation
  • Modulators
  • Multiple Access
  • Printed Circuits
  • Spread Spectrum

Readers

  • Radio communications and signal processing.