Accession Number:

AD0626157

Title:

ANALYSIS OF THE FREQUENCY DEPENDENCE OF MAN-MADE RADIO NOISE,

Descriptive Note:

Corporate Author:

AEROSPACE CORP SAN BERNARDINO CA

Personal Author(s):

Report Date:

1965-12-01

Pagination or Media Count:

21.0

Abstract:

Two theoretical noise generation processes have been proposed and analyzed as models for the experimentally observed frequency dependence of man-made radio noise in the frequency intervals 10 kcps to 20 mcps and 100 mcps to 500 mcps. The computed results for the normalized variation of the noise spectral power density as a function of frequency have been shown to agree within the statistical variation of the experimental data for both frequency intervals. The proposed mechanism of noise generation in the higher frequency interval presumes the man-made noise arises from randomly occurring narrow i impulses. In the lower frequency interval the noise emissions are modeled assuming the pulses form a train of independent events with an average frequency of occurrence, v. The noise arising from both emission processes is presumed to be attenuated in a manner controlled by the propagation statistics applicable to radio transmission over irregular terrain from low antenna heights.

Subject Categories:

  • Radiofrequency Wave Propagation
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE