Energy-detection based spectrum-sensing in cognitive radio networks over multipath/shadowed fading channels

The performance of spectrum-sensing based energy-detection (ED) in cognitive radio networks (CRNs) over the extended generalized-K (EGK) fading channels is analyzed. More specifically, exact and accurate analytical expressions for the average detection probability under different detection scenarios, such as, single channel (no diversity), diversity reception, and cooperative spectrum sensing, are derived and evaluated. The derived analytical framework can be used for both integer and non-integer values of the fading/shadowing parameters. The impact of the fading/shadowing parameters on the performance of energy detectors is studied in terms of receiver operating characteristics (ROC) curves. To verify the correctness of our analysis, the derived analytical expressions are corroborated via Monte-Carlo simulation results.