Spectrum maps for cognition and co-existence of communication and radar systems

Abstract

An essential part of cognitive radios and radars is to build situation awareness of the radio spectrum. The state of the time-space-frequency varying spectrum may be presented as spatio-temporal spectrum maps that may be used to better utilize and share spectral resources among radar and communication systems, manage interference and avoid jamming. RF measurements made using multiple sensors in distinct locations are crucial in creating such spectrum maps. However, one also needs to know the state of the spectrum between the sensor locations and capture the dynamic behavior of spectrum in order to facilitate agile use of waveforms, interference management and co-existence of radar and communication systems. Advanced methods stemming from spatial statistics are developed for constructing and maintaining spectrum maps. The performance of the methods is studied in simulation.