Title :
Improvement of slow-rate f.s.k. by frequency agility and coding
Author :
Gott, G.F. ; Hillam, B.
Author_Institution :
University of Manchester Institute of Science and Technology, Department of Electrical Engineering & Electronics, Manchester, UK
fDate :
6/1/1979 12:00:00 AM
Abstract :
An f.s.k. signal keyed at 75 bauds with 850 Hz frequency shift, can have one of several frequency allocations within any given h.f. voice channel. In the presence of interference from other users, the f.s.k. system performance may be improved by choosing the f.s.k. tone frequencies before message transmission, to correspond to frequencies within the voice channel where the interference is least. This paper reports on an 800 km point-to-point h.f. link experiment which investigated this principle, combined with forward error-correcting codes, with the aim of improving aeromobile data transmission.
Keywords :
data communication systems; error correction codes; frequency agility; frequency shift keying; radio links; 75 bauds; 800 km HF link; 850 Hz frequency shift; aeromobile data transmission; aeronautical HF voice channels; coding; error correction codes; frequency agility; one of several frequency allocations; radio links; slow rate FSK;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1979.0115
