A Spread Spectrum Communications Systems Utilizing an Umbrella Code.

Abstract

A pulse stuffing technique is used to eliminate the silent gaps in the transmission of a particular Spread Spectrum system. Unauthorized listeners now have more difficulty in recovering the message content. A two code device was built using both a pseudorandom maximal length code and a Golay complementary sequence code. The pseudorandom code was used for pulse stuffing an umbrella code and was discarded after a digital matched filter in the receiver. The Golay code was added with a Surface Acoustic Wave dispersive element and removed with a similar device used as a matched filter. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1975
Accession Number
ADA021767

Entities

People

  • James Alfred Jaques Iii

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Acoustic Waves
  • Elastic Waves
  • Filters
  • Matched Filters
  • Mechanical Waves
  • Sequences
  • Spectra
  • Spread Spectrum
  • Surface Acoustic Waves
  • Waves

Readers

  • Computer Programming and Software Development.
  • Optical Fiber Sensing and Electromagnetic Propagation.