Radio Spectrum Predicts Primary User Transmission Status Over The Licensed Band

The radio spectrum is encountering significant scarcity in the current times due to the increased demand for radio resources. New communication channels are required to test the new technology. Such demands put the technology providers at a crossroads where they must purchase new radio resources or reuse the available spectrum. Cognitive Radio is a term that refers to a technique that enables unlicensed users to efficiently share spectrum. In this paper, the underlying and interweave spectrum sharing techniques will be studied considering the uncertain nature of licensed users. TheCognitive Radio system is simulated in Matlab over the AWGN channel and the results showed a trade-off between the performance metrics of spectrum sharing (throughput and transmission delay).