scholarly journals SC-FDE Layer for Sensor Networks in Remote Areas Using NVIS Communications

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1636
Author(s):  
Tomas Gonzalez ◽  
Joaquim Porte ◽  
Jordi Male ◽  
Joan Navarro ◽  
Josep M. Maso ◽  
...  

Despite high costs and lengthy deployments, satellite communications have traditionally been used to provide coverage in remote areas. However, given the fact that there is no radio infrastructure available in these areas, Near Vertical Incidence Skywave (NVIS) technology has positioned itself as an attractive alternative to communicate with low-power nodes in remote areas. This type of communication works in the HF frequency range complying with STANAG and MIL-STD standards, which define a physical layer for scenarios that differ from NVIS and low-power communication. The purpose of this paper was to present the definition of a new communication physical layer based on single-carrier frequency-domain equalization (SC-FDE) based on these standards but adapted to the ionospheric communication channel. This physical layer was compared to an OFDM-based layer from a previous study. The experiments performed show that this new approach achieves better results than OFDM in terms of a higher signal quality with a higher specific BER probability. Finally, this layer was also used in the theoretical design of an NVIS gateway to link sensor network devices spanning large-scale remote areas in a secure manner in the context of ubiquitous sensor networks (USN).

2011 ◽  
Author(s):  
Young-Sik Jeong ◽  
Eun-Ha Song ◽  
Gab-Byung Chae ◽  
Min Hong ◽  
Doo-Soon Park

2010 ◽  
Vol 25 (2) ◽  
pp. 48-59 ◽  
Author(s):  
Young-Sik Jeong ◽  
Eun-Ha Song ◽  
Gab-Byung Chae ◽  
Min Hong ◽  
Doo-Soon Park

This chapter examines the rise and fall of the “radio geographies” of the North and, with them, of the relationship between Northern nature and shortwave radio disruptions in Canada. It focuses on maps created around the Canadian Broadcasting Corporation (CBC)’s shortwave transmissions and their place in the large-scale state initiatives of the 1950s and 1960s. These geographies defined the failure of radio broadcasts according to a specific human geography of the North, a spatial distribution of radio transmitters, and a natural order of high-northern latitudes. That fallibility, in turn, was used to define the North as a region. Government officials envisioned shortwave radio as a medium naturally suited to the customs and culture of indigenous people. In the late 1960s, satellite communications, which promised to overcome radio disruptions, were seen as a threat not only to indigenous culture but to the definition of the region itself.


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