Accession Number:

ADA050844

Title:

Performance of Voice Communications Systems in the Presence of Spread Spectrum Interference.

Descriptive Note:

Final rept.,

Corporate Author:

IIT RESEARCH INST ANNAPOLIS MD

Personal Author(s):

Report Date:

1977-12-01

Pagination or Media Count:

73.0

Abstract:

A computer simulation model developed for determining the manner in which undesired spread spectrum signals affect the performance of conventional narrowband AM and FM voice communication systems is described. Direct-sequence, frequency-hopping and hybrid, frequency-hoppingdirect-sequence, spread spectrum interference signals were modeled. Binary phase-shift keying and minimum-shift keying were included for the carrier modulation of the direct-sequence signals and the direct-sequence portion of the hybrid signals. In addition to the spread spectrum interference, pulsed interference and white Gaussian noise were modeled. Using articulation index as the measure of performance, comparisons are made between system performance for direct-sequence interference and white Gaussian noise. System performance for frequency-hopping or frequency-hoppingdirect-sequence interference is compared with that for pulsed interference. Author

Subject Categories:

  • Computer Hardware
  • Voice Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE