Defense Advanced Research Projects AgencyTagged Content List

Electromagnetic Spectrum and Bandwidth

Novel concepts and technologies for maximizing use of the electromagnetic spectrum

Showing 8 results for Spectrum + Networking RSS
01/01/2014

On March 19-20, 2014, 15 teams from around the United States participated in the final event of the DARPA Spectrum Challenge, a competition designed to encourage development of programmable radios that can deliver high-priority transmissions in congested and contested spectrum environments.

12/12/2013
Multinational forces, U.S. government agencies and U.S. troops operating together in forward-deployed locations generally have problems communicating—and not just due to language differences. Technical incompatibility between communications systems can hinder information sharing and timely command and control decisions. DARPA’s Mobile Ad hoc Interoperability Network Gateway (MAINGATE) program is helping overcome this technology barrier. The program is nearing completion and plans to transfer the latest version of the system to Army warfighters still engaged in Afghanistan, but who are now focused more on Force Protection as U.S. forces draw down. The MAINGATE system is providing insights into tactical networking of the future, where systems will need more adaptability and capability.
04/02/2014
Reliable wireless communications today requires careful allocation of specific portions of the electromagnetic spectrum to individual radio networks. While pre-allocating spectrum is effective in benign environments, radios remain vulnerable to inadvertent interference from other emitters and intentional jamming by adversaries.
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.
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.