A Spread Spectrum Communication Technique.

Abstract

A practical solution to the problem of realizing a signal processing method for a covert voice communications system was the objective of the thesis. Spread spectrum technology in the form of Golay complementary sequences implemented with acoustic surface wave devices was used to achieve this processing. The resultant device was an audio transceiver MODEM in which a specially coded form of pulse code modulation (PCM) was applied to a voice signal to enable application of the spread spectrum concept. The technique exploited spread the 3 KHZ voice modulation over a one MHZ bandwidth. A method of PCM synchronization evolved which achieves system send/receive synchronization with a minimum of data loss and a minimum amount of actual hardware. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1973
Accession Number
AD0769416

Entities

People

  • James Alfred Cocci

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Bandwidth
  • Modulation
  • Pulse Code Modulation
  • Sequences
  • Signal Processing
  • Spectra
  • Spread Spectrum
  • Surface Acoustic Wave Devices
  • Surface Waves
  • Transceivers
  • Voice Communications
  • Waves

Fields of Study

  • Engineering

Readers

  • Computer Programming and Software Development.
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Image Processing and Computer Vision.