ARLA/CLUSTER: Pesquisadores universitários demonstram a capacidade de comunicação com elevada largura de banda para navios

[João Costa > CT1FBF]

Researchers demonstrate high-bandwidth communications capability for ships

A team of engineers from the Johns Hopkins University *Applied Physics
Laboratory* (APL), in Laurel, Maryland, has successfully demonstrated a
high-bandwidth, free-space optical (FSO) communications system between two
moving ships, proving operational utility of FSO technology in the maritime
environment.

*Juan Juarez*, the technical lead for the team developing the technology,
said APL is the first organization to successfully operate such a
high-capacity optical communications capability—up to 10 gigabits per
second—on the move, on board ships at sea, and in challenging near-shore
environments.

"We demonstrated bandwidths that were several orders of magnitude higher
than all current radio frequency [RF] communications capability on Navy
vessels, and at longer ranges than previously demonstrated FSO technology
for maritime applications," Juarez said. "This is the equivalent to having
up to 2,000 users simultaneously watching high-definition video streams
across the optical link."

The Lab demonstrated its latest compact form factor system at the 2017
Trident Warrior Exercise, an annual event where sailors try out the newest
innovations in naval warfare systems and provide feedback on those systems
to commanders and developers.

Staying in Touch

Navy ships typically use RF systems to communicate—but the Navy also looks
for alternative means of communication in case, for technical, operational
or environmental reasons, radio transmission isn't available. "Naval
platforms increasingly need to operate effectively in reduced-RF or
emission control conditions while maintaining their tactical advantage and
situational awareness," noted Juarez.

Free-space optical communication systems—which make use of wireless
transmission to deliver optical data signals at high bit rates—offer a
compelling adjunct communications capability to conventional RF and
microwave communications by providing secure high data rates outside the
conventional RF spectrum.

Commercial FSO systems exist but typically don't address defense needs,
Juarez said, "specifically in terms of system mobility, link range, and
data rate while operating in the highly scintillated terrestrial
environment, especially close to the water." FSO demonstration systems
previously built for terrestrial defense applications have been too large,
or lacked the mobility, data rates, or ranges to be practical on naval
platforms.

Read more at:
https://phys.org/news/2017-08-high-bandwidth-capability-ships.html
<https://phys.org/news/2017-08-high-bandwidth-capability-ships.html#jCp>

*•* Our thanks to *Stephen, G7VFY* for spotting this item
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