Fuzzy-Logic Based Framework for Spectrum Availability Assessment in Cognitive Radio Systems

摘要: This paper presents a novel decision-making system for the selection of methods to obtain knowledge spectrum availability in future mobile communication systems equipped with cognitive radio (CRS) capabilities. The proposed scheme selects between control channels, databases and sensing based on specific requirements frequency band at hand. developed considers realistic bands sharing scenarios, including primary allocation service where operator governs use, co-primary or secondary users have be protected from harmful interference, finally license-exempt bands, different coexist uncontrolled interference conditions. Specifically, rule-based learning mechanism is select among techniques matched filtering, correlation detection, feature energy cooperative sensing. decision making further applied operator-governed opportunistic networks, which are dynamically created temporary extensions infrastructure networks. Performance evaluation done by assuming changing operational conditions so as elucidate gains respect case when approach kept fixed.