Spectrum Sensing and Sharing by Cognitive Radios in Position, Navigation and Timing (PNT) Systems

ABSTRACT: The next-generation Global Positioning System (GPS) in congested and contested environments is expected to exploit Spectrum Holes (SH) in order to provide uninterrupted Position Navigation and Timing (PNT) service worldwide. Innoflight has teamed with the Air Force Institute of Technologys (AFITs) Autonomy and Navigation Technology (ANT) Center to develop a system based on cognitive radio (CR) that uses spectrum monitoring stations to instrument L- through C-Bands for temporal and spatial SH. Once the desired frequencies of operation are identified, they are passed to the operational tasking function in order to provide the appropriate plan for the GPS space and user equipment segments. Future generations of spectrum monitoring receivers incorporated into Military GPS User Equipment (MGUE) will be able to form a spectrum monitoring ad hoc network in deployed operations.; BENEFIT: Military applications include advanced GPS systems and operations, communication systems and electronic warfare systems. Civilian applications include PNT systems and communication systems.