Accession Number:

AD0882109

Title:

Analysis of Pulsed Interference to Amplitude Modulated Receivers. Volume I

Descriptive Note:

Technical rept.

Corporate Author:

IIT RESEARCH INST ANNAPOLIS MD

Personal Author(s):

Report Date:

1970-12-01

Pagination or Media Count:

196.0

Abstract:

This report documents two general methods for evaluating the performance degradation of amplitude modulated AM receivers subjected to pulsed interference. The first method involves a time waveform receiver simulation model that provides detailed theoretical solutions for a range of pulse parameters. The second method uses a combination of measured data and engineering trends which cover a reasonably complete range of pulse parameters. The predominant cause of performance degradation to AM receivers is the energy of the pulse spectrum within the receivers bandpass. For rectangular pulses with duty cycles less than 8, the pulsed interference does not appreciably lower the average voice intelligibility in terms of Articulation Score AS. The performance degradation is, in general, proportional to the log of the pulse repetition frequency PRF and is independent of the pulse width for on-tune pulses wider than the inverse of twice the baseband bandwidth.

Subject Categories:

  • Electromagnetic Pulses
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE