Measured Noise Performance of a Direct-Sequence Spread-Spectrum System and a Comparison of Single- Vice Dual-Channel Delay-Lock Loops.

Abstract

A direct-sequence (DS) spread spectrum system which could be used by a conventional amplitude modulated (AM) radio system was designed, built and tested. A delay-lock loop was used to provide code synchronization in the receiver. The noise performance of single-channel delay-lock loop (DCDLL) with no data being transmitted. When data was transmitted a DCDLL was used and the noise performance (probability of bit error) of the DS spread spectrum system was measured. Test results indicate that SCDLL performs as well as or better than the DCDLL. The measured noise performance advantage relative to the DCDLL and that this DS spread spectrum can be used to transmit low rate digital data reliably at values of SNR much than unity. It is recommended that this DS spread spectrum system be considered by the Department of Defense to be implemented in AM radio system to provide low data rate-anti-jam-interference rejection capability.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1987
Accession Number
ADA186288

Entities

People

  • Chris G. Bartone

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Bandpass Filters
  • Communication Systems
  • Correlators
  • Data Rate
  • Demodulation
  • Demodulators
  • Digital Data
  • Engineering
  • Generators
  • Integrated Circuits
  • Matched Filters
  • Measurement
  • Modulation
  • Performance Tests
  • Phase Shift
  • Radio Equipment

Fields of Study

  • Engineering

Readers

  • Radio communications and signal processing.