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Regular Issue
Wideband measurements of coherence over an HF skywave link and implication for spread-spectrum communication
Article first published online: 7 DEC 2012
DOI: 10.1029/RS021i003p00463
Copyright 1986 by the American Geophysical Union.
1944-799X/asset/cover.gif?v=1&s=ae852a95729932c3d8c1a7411bad631437d05dbe "Radio Science")
Additional Information
How to Cite
, and (1986), Wideband measurements of coherence over an HF skywave link and implication for spread-spectrum communication, Radio Sci., 21(3), 463–472, doi:10.1029/RS021i003p00463.
Publication History
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 13 NOV 1985
- Manuscript Received: 15 MAR 1985
- Abstract
- References
- Cited By
A wideband frequency-modulated, continuous-wave (FMCW) oblique incidence sounder was used in an experiment to measure the coherent bandwidth of a one-hop F2 layer propagated ionospheric path. The experimental data were collected over a 234-km link in the United Kingdom by using frequency sweeps of up to 5 MHz repeated at 10-s intervals. The path had the characteristics of quasi-longitudinal propagation. The results indicated that the limiting factors to the coherent bandwidth are mainly polarization interference and frequency dispersion. Data on the coherent bandwidth and fade depth as a function of frequency and the time variation of the amplitude frequency response are presented.