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Design, implementation, and test of an SDR for NVIS communications
Author(s) -
Porte Joaquim,
Maso Josep,
Pijoan Joan Lluis,
Badia David
Publication year - 2019
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2670
Subject(s) - ultra high frequency , skywave , transmission (telecommunications) , computer science , reflection (computer programming) , high frequency , electrical engineering , telecommunications , remote sensing , electronic engineering , ionosphere , engineering , geography , physics , radar , programming language , astronomy
Summary Although many physical layer solutions have appeared for remote sensors and Internet of things during the recent years, none of them is suited to very remote sensors in areas away from any mobile operator coverage. In that case, a solution on the basis of near vertical incidence skywave (NVIS) with reflection in the ionosphere may be very attractive. Using NVIS, no line of sight is needed and the coverage is much bigger than any other system operating in either the very high frequency (VHF) or ultra high frequency (UHF) band. In this paper, we present a new transmission scheme for very remote sensors using the NVIS transmission technique.