Measurement and Analysis of Multipath in Aircraft-Satellite Communications Links at UHF
Abstract
A major accomplishment of the work included measurements of multipath in an aircraft-satellite communication link at 300 MHz. Theoretical studies of aircraft-satellite communications links were also performed. The experimental multipath tests were performed between an aircraft flying off the coast of Labrador and The Ohio State University Satellite Facility via the TACSAT satellite relay. Multipath returns were observed during various portions of the flight tests primarily while the aircraft was in a bank. Polaroid pictures and high speed motion picture data of the received signal were taken throughout the flight tests. The results of reducing 40 seconds of motion picture data (100 frames/second) indicated that the multipath return was essentially specular in nature (i.e., single ray multipath) with an amplitude 6 dB down from the direct signal. The polaroid photographs showed a range of multipath depths ranging from -4 to -9 dB.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1971
- Accession Number
- AD0888844
Entities
People
- John W. Mayhan
Organizations
- Ohio State University