Accession Number : AD0787453

Title :   Multipath Channel Simulation and Modem Evaluation Program.

Descriptive Note : Interim rept. Oct 73-Apr 74,

Corporate Author : ENVIRONMENTAL RESEARCH AND TECHNOLOGY INC LEXINGTON MASS

Personal Author(s) : Duncombe,Christopher B.

Report Date : AUG 1974

Pagination or Media Count : 70

Abstract : The Department of Transportation, Transportation Systems Center has developed a laboratory communications test facility. To evaluate in a laboratory controlled simulated environment, alternative modulation techniques having potential application in aeronautical and maritime satellite communications and surveillance systems. The main feature of the communication test facility is the hardware for simulating, by means of laboratory equipment, the narrowband (50 KHz) AEROSAT satellite-to-aircraft propagation channel. The simulator also simulates the maritime satellite-to-ship propagation channel and is expandable to wideband (10 MHz) systems; e.g., future CONUS ATC Systems. The simulator includes provisions for duplicating multipath phenomena over the satellite links and includes provisions for adjustment and programming of channel parameters covering a wide range of environmental conditions. (Modified author abstract)

Descriptors :   *Multipath transmission, *Modems, *Test facilities, Simulators, Bandwidth, Satellite communications, L band, Radio links, Communication equipment, Aircraft equipment, Air to space

Subject Categories : Test Facilities, Equipment and Methods
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE