An Improved Energy Detector for Mobile Cognitive Users Over Generalized Fading Channels
Abstract: A cooperative cognitive radio network (CRN) with improved energy detection-based spectrum sensing is analyzed in various fading scenarios. Generalized multipath (Nakagami- m ) fading and enriched multipath (Nakagami- q ) fading models are considered along with two other general fading distributions, i.e., ? - µ and ? - µ distributions. For spectrum sensing, instead of conventional power 2-based detection method, the arbitrary power p -based improved energy detector is used. The impact of the cognitive user mobility on the performance of the improved energy detector is investigated. Specifically, the statistics for the received signal are derived over various fading environments. The performance of the considered CRN system is evaluated in terms of probability of false alarm, probability of missed detection, and receiver operating characteristics (ROC) curves. Moreover, the area under the ROC curve is also obtained. Simulation results are provided to corroborate the theoretical results derived in this paper.
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