Title :
Eliminating co-location radio interference with photonic-enhanced spectrum management in cognitive radio networks
Author :
Sonnenberg, Jerome ; DeSalvo, Richard ; Middleton, Charles
Author_Institution :
Harris Corp., Melbourne, FL, USA
Abstract :
Co-location of RF emitters (communications plus jammer) is a problem in tactical operations where the goal within a tactical platform is to maintain blue force communications and deny (jam) red force communications or, indeed, any red force use of spectrum. Dynamic Spectrum Access (DSA) on the DARPA neXt generation (xG) communications program [1] has a goal to sense and share spectrum for more efficient use. A port and test of this DSA capability from a commercial radio to a tactical radio showed significant improvement in tactical communications in a jamming environment. The sense and respond capabilities discussed in this paper have been extended on IRAD to include a photonic-assisted, frequency converting front-end module utilizing heterodyne frequency conversion to generate a wide range of carrier frequencies for DSA transmission, and heterodyne down conversion along with photonic signal processing techniques to generate nulls at RF frequencies to protect the radio from intermodulation distortions arising from nearby strong RF signals (friendly jammer). Some of the DSA capabilities in the field tests were enabled only by somewhat counter-intuitive measures on the military radios. This has led to the development of a mission-based ontology that considers the mission, the cognitive radio capabilities (DSA and more) and the traditional RF parameters in a network of platforms as a system. The gains from an ontology- based solution are discussed.
Keywords :
cognitive radio; intermodulation distortion; jamming; military communication; military computing; next generation networks; ontologies (artificial intelligence); radio spectrum management; spread spectrum communication; telecommunication computing; DARPA neXt generation communications; DSA capability; DSA transmission; IRAD; RF emitters; RF frequency; RF parameters; RF signals; blue force communications; carrier frequency; co-location radio interference; cognitive radio capability; cognitive radio networks; commercial radio; counter-intuitive measures; dynamic spectrum access; frequency converting front-end module; friendly jammer; heterodyne down conversion; heterodyne frequency conversion; intermodulation distortions; jamming environment; military radios; mission-based ontology; ontology-based solution; photonic signal processing techniques; photonic-assisted front-end module; photonic-enhanced spectrum management; red force communications; tactical communications; tactical operations; tactical platform; tactical radio; xG communications program; Frequency conversion; Jamming; Optical fiber communication; Optical filters; Optical modulation; Photonics; Radio frequency;
Conference_Titel :
MILITARY COMMUNICATIONS CONFERENCE, 2011 - MILCOM 2011
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4673-0079-7
DOI :
10.1109/MILCOM.2011.6127670