Primary user detection in OFDM based MIMO Cognitive Radio

Abstract

In order to detect the presence of the primary user signal with high probability, spectrum sensing is a fundamental requirement to achieve the goal of cognitive radio (CR). This ensures efficient utilization of the spectrum. Energy detection is one of the technique to detect the primary users that are receiving data within the communication range of a CR user. In this work, detection performance of the primary user (PU) signal on CR receiver is investigated. In particularly, the OFDM based CR receiver detect the primary user OFDM signal, where CR receiver is equipped with multiple antennas based energy detector. We observe significant improvement in primary user detection with SLC based energy detection at the MIMO CRs in comparison to single antenna CRs.