Accession Number:

ADA091764

Title:

Adaptive Antenna Control (AAC) Program.

Descriptive Note:

Final rept. Jun 78-Mar 80,

Corporate Author:

SIGNATRON INC LEXINGTON MA

Personal Author(s):

Report Date:

1980-08-01

Pagination or Media Count:

159.0

Abstract:

A theoretical and empirical investigation of angle diversity for application on Defense Communications System DCS tropospheric scatter communication links has been completed. The major results are 1 Development of a new propagation prediction model applicable at frequencies up to 5 GHz. 2 Development of a modem prediction model for calculating the bit error rate and fade outage on a fading multipath channel for the MD-918GRC modem. 3 A trade-off analysis to determine the optimum angle diversity system. 4 Design and development of a 4.4-5.0 GHz C-Band angle diversity feedhorn which gives a beam separation within about 12 dB of optimum. 5 Theoretical and empirical evidence that angle diversity has a performance advantage over frequency diversity. 6 Discovery of reduced correlation effects in angle diversity when wideband signals are employed. 7 Development of a methodology and a statistical base for development of future angle diversity systems.

Subject Categories:

  • Electrical and Electronic Equipment
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE