This paper presents the performance analysis of spectrum sensing systems based on double threshold energy detection over κ-µ fading channels, which represents the small-scale variations of the fading signal under both light-of-sight and multipath scenarios. Receiver Operation Characteristics (ROC) are obtained regarding the double threshold scheme and comparisons are performed against the traditional single threshold method. Detection probabilities are derived and investigated for both low and high SNR cases considering different threshold values. Moreover, numerical results show interesting improvements in spectrum sensing systems with the proposed double threshold scheme. Finally, field trial measurements are used in order to investigate the usefulness of the double threshold scheme in energy detectionbased spectrum sensing networks under κ-µ fading scenarios.

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