Eigenvalue-based spectrum sensing algorithms for cognitive radio
IEEE Transactions on Communications
Cross-layered design of spectrum sensing and MAC for opportunistic spectrum access
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Clear channel assessment in energyconstrained wideband wireless networks
IEEE Wireless Communications
Sensing-Throughput Tradeoff for Cognitive Radio Networks
IEEE Transactions on Wireless Communications
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
Decentralized cognitive MAC for opportunistic spectrum access in ad hoc networks: A POMDP framework
IEEE Journal on Selected Areas in Communications
Cross-layered design of spectrum sensing and MAC for opportunistic spectrum access
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Performance analysis of a slotted multi-channel MAC protocols for cognitive radio networks
Proceedings of the 5th International Conference on Queueing Theory and Network Applications
Performance analysis of modified IEEE 802.11-based cognitive radio networks
IEEE Communications Letters
Fast track article: Bandwidth scavenging for device coexistence in pervasive computing systems
Pervasive and Mobile Computing
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This paper considers a distributed opportunistic spectrum access (D-OSA) scenario in which multiple cognitive radio (CR) users attempt to access a channel licensed to some primary network. CR users operate on a frame-by-frame basis and need to carry out spectrum sensing at the beginning of each frame to determine if the primary network is active or idle. Upon detecting the primary network being idle, each CR user employs a modified 802.11 DCF protocol for contention-based channel access. Spectrum sensing is imperfect and introduces false alarms and mis-detections. To protect primary users, it is required that the combined probability of mis-detection of all CR users must be below a specified threshold. We provide concrete protocol design, performance analysis, and extensive simulation results for our D-OSA design. Our results highlight the importance of taking a cross-layer view and jointly designing PHY-layer spectrum sensing and MAC-layer channel access.