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Posted by on Dec 19, 2012 in Internet |

DARPA works to create 100 Gbps wireless network with a range of 200 km

DARPA works to create 100 Gbps wireless network with a range of 200 km

(Cc) Official U.S. air Force

Besides developing ” dogs “and” cheetah “robot, defense agency U.S. is working on a wireless communication link to be able to transmit 100 Gbps in a range of 200 kilometers. The project was dubbed “100 Gb / s Backbone” or just 100G, and seeks to provide better tools for military communications – in practice, connectivity as they would get with a fiber optic network, but through the air.

To communicate in times of war, the U.S. military builds its own wireless networks using Common Data Link (CDL), a wireless protocol that uses secure all military units – airplanes, helicopters, bases, robots – either to send images, orders, information, etc. The signals are sent through satellites or high altitude aircraft using to bounce the signal. The exact of the network, but it is believed that can reach up to 250 Mbps, which is what DARPA now wants to improve up to 100 Gbps.

Transmitting this amount of data through the air is difficult: The WiFi in a home can probably reach 100 Mbps, which is 1,000 times slower than what DARPA hopes to accomplish. Using optical systems, sending data via visible light, it is not very feasible to send information over a range of 200 kilometers, where you can meet obstacles, clouds, etc.

The only option is the radio frequency (RF), although it is unclear how they could achieve such speed. It is believed that might try to use the low frequency band Ku, which is less susceptible to interruptions by rain and other weather conditions. Yes, you have to create new techniques to encrypt and send data to allow a bandwidth greater.

Although DARPA plans to use this system only for military purposes, an invention of this type could have enormous impact on the commercial networks, enabling high-speed installed in areas not served by cable, for example. It could also mean lower costs for installing network access in general and would not have to deploy expensive cables, but some antennas suffice.

Link: DARPA begins work on 100 Gbps wireless tech with 120-mile range (ExtremeTech)

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