Geo-Location Spectrum Opportunities Database in Downlink Radar Bands for OFDM Based Cognitive Radios
In this paper a model to investigate the spectrum opportunities for cognitive radio networks in three radar frequency bands L, S and C at a specific location is introduced. The authors consider underlay unaware spectrum sharing model. The Secondary System they assume is an OFDM based system. The followed strategy is built upon defining a specific co or adjacent channel as a spectrum opportunity if -and only if-the interference generated by the secondary system occupying that channel into the radar system is less than the permissible interference defined by the value of Interference to Noise Ratio (INR) and the radar receiver inherited noise level.