Defense Advanced Research Projects AgencyTagged Content List

Resilience and Robustness

Enabling technologies and systems to preserve effectiveness despite damage or other challenging conditions

Showing 4 results for Resilience + Spectrum RSS
DARPA published its Young Faculty Award (YFA) 2018 Research Announcement today, seeking proposals in 26 different topic areas—the largest number of YFA research areas ever solicited.
The military relies heavily on the Global Positioning System (GPS) for positioning, navigation, and timing (PNT), but GPS access is easily blocked by methods such as jamming. In addition, many environments in which our military operates (inside buildings, in urban canyons, under dense foliage, underwater, and underground) have limited or no GPS access. To solve this challenge, Adaptable Navigation Systems (ANS) seeks to provide GPS-quality PNT to military users regardless of the operational environment.
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.
The purpose of this Proposers Day is to provide information on the RN DMC program. The RN DMC program's objective is to provide long-range communications through 'mosaic' antennas composed of spatially distributed low size, weight, power, and cost (SWaP-C) transceiver elements or 'tiles'. The RN DMC approach replaces high powered amplifiers and large directional antennas with mosaics of spatially dispersed tile transceivers. Transmit power is spatially distributed amongst the tiles, and gain is achieved through signal processing rather than the use of a physical antenna aperture to concentrate energy. Individual tiles can use radio frequency (RF) sounding to estimate channel responses and adjust transmit carrier phases. This enables the distributed mosaic antenna to form directional beams and/or spatial nulls in desired directions.