Accession Number:

ADP006894

Title:

Doppler-Multipath Tolerant Voice Communications,

Descriptive Note:

Corporate Author:

ROYAL AEROSPACE ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)

Personal Author(s):

Report Date:

1991-06-01

Pagination or Media Count:

11.0

Abstract:

Line-of-sight communication between high-performance aircraft has been found to be subject to a peculiar form of multipath radio-wave propagation - Doppler multipath. It degrades analogue voice reception on the standard-fit UHF radio, producing low-frequency random noise and warbling. Various modifications were carried out on the aircrafts communications system but the problem remained all the evidence points to a natural phenomenon. The reported observations are corroborated by theoretical studies and laboratory simulations of multipath radio-wave propagation between 2 points moving relative to a diffusely scattering reflector.

Subject Categories:

  • Radio Communications
  • Radiofrequency Wave Propagation
  • Attack and Fighter Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE