Direct-Sequence Spread Spectrum System

Abstract

The purpose of this study is to construct and evaluate the performance of a direct-sequence spread spectrum (DSSS) system. The system, based upon a previously published design, uses a special type of injection- locked oscillator called a synchronous oscillator for code synchronization. The DSSS system was constructed in a manner that provides a test-bed for demonstrating spread spectrum principles and allows researchers to evaluate their own sub-system design concepts. The DSSS system, designed as a one-way link in the 420-450 MHz band, is constructed to operate in accordance with Federal Communications Commission rules and regulations pertaining to the Amateur Radio Service (Part 97). Unlike conventional DSSS systems which combine digital data with a pseudorandom (PN) code sequence, the system described here directly modulates an FM modulated carrier with the PN code sequence.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1990
Accession Number
ADA223021

Entities

People

  • James P. Stephens

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bandpass Filters
  • Bandwidth
  • Circuit Boards
  • Communication Systems
  • Digital Data
  • Digital Information
  • Electrical Engineering
  • Field Effect Transistors
  • Frequency
  • Oscillators
  • Radio Communications
  • Radio Frequency Amplifiers
  • Radio Transmitters
  • Resonant Frequency
  • Spread Spectrum
  • Test And Evaluation
  • Test Beds

Readers

  • Radio communications and signal processing.
  • Software Engineering