Spectrum Sensing Measurement Using GNU Radio and USRP Software Radio Platform
Spectrum utilization can be significantly improved by adopting Cognitive Radio (CR) technology. Such radios are able to sense the spectral environment and use this information to opportunistically provide wireless links that meet the user communications requirements optimally. To achieve the goal of cognitive radio, it is a fundamental requirement that the Cognitive User (CU) performs spectrum sensing to detect the presence of the Primary User (PU) signal before a spectrum is accessed as to avoid harmful interference. Therefore, two probabilities are of interest; the probability of detection, Pd and the probability of false alarm, Pfa.