The performance of energy detection (ED) over shadowed fading channel is analysed. The analysis is then extended to include the maximal ratio combining (MRC) and square law combining (SLC) schemes with non-identically distributed branches. Moreover, the analysis over extreme shadowed fading channel, that is utilised to model the wireless communications scenarios in enclosed areas, is also investigated. To this end, exact closed-form analytic expressions of the average area under the receiver operating characteristics curve (AUC) are derived
