Defense Advanced Research Projects AgencyTagged Content List

Communications and Networks

All manner of sending, receiving, connecting and protecting information

Showing 44 results for Communications + Spectrum RSS
Modern expeditionary military missions generate and exchange massive amounts of data that are used to produce situational awareness and guide decision-making. Much of the data must travel long distances along backbone communications networks composed of high-capacity links that interconnect command centers.
The Advanced RF Mapping program seeks to provide radio frequency (RF) situational awareness using low-cost sensors distributed over the battlespace. The sensors include devices deployed for other purposes, such as tactical radios. The vision is that all RF devices in theater will support RF situational awareness when not performing their primary mission.
Defense forces rely on electromagnetic dominance for command, control, intelligence, surveillance, reconnaissance, and related applications that use the electromagnetic spectrum. Similarly, spectrum use by our adversaries, coupled with extensive commercial use, yields an increasingly congested space, time and frequency environment.
Current military communication systems have limited ability to support mobile, distributed operations in remote geographic areas due to the small size of networks and relatively short range of military radios. Today, military mobile ad hoc networks (MANETs) are used to relay communications services beyond the range of a single radio.
Military satellites are critical sources of communications and data for today’s operations environments. Through DARPA’s Phoenix program, useable antennas or solar arrays from retired satellites in geosynchronous orbit (GEO – 36,000 kilometers above earth) could be removed and potentially repurposed as components for new satellites to provide vital mission support.