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As wireless devices proliferate and the radio spectrum becomes ever more congested, all users have a common interest in radio technologies that can accommodate the largest number of users but still enable priority traffic to get through. The DARPA Spectrum Challenge—a competitive demonstration of robust wireless technologies—recently announced the selection of 15 of 18 semifinalists for $150,000 in prize money. DARPA plans to fill three remaining wildcard slots in August 2013 before the September 2013 semifinals at DARPA’s offices in Arlington, Va.
Radios are used for a wide range of tasks, from the most mundane to the most critical of communications, from garage door openers to first responders to military operations. Wireless devices often inadvertently interfere with and disrupt radio communications, and in battlefield environments adversaries may intentionally jam friendly communications. To stimulate the development of radio techniques that can overcome these impediments, DARPA launched its Spectrum Challenge—a competitive demonstration of robust radio technologies that seek to communicate reliably in congested and contested electromagnetic environments without direct coordination or spectrum preplanning.
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 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.