NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Cognitive PHY and MAC layers for dynamic spectrum access and sharing of TV bands
TAPAS '06 Proceedings of the first international workshop on Technology and policy for accessing spectrum
Performance of power detector sensors of DTV signals in IEEE 802.22 WRANs
TAPAS '06 Proceedings of the first international workshop on Technology and policy for accessing spectrum
In-band spectrum sensing in cognitive radio networks: energy detection or feature detection?
Proceedings of the 14th ACM international conference on Mobile computing and networking
Distributed spectrum sensing and access in cognitive radio networks with energy constraint
IEEE Transactions on Signal Processing
A POMDP-based spectrum handoff protocol for partially observable cognitive radio networks
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Adaptive joint scheduling of spectrum sensing and data transmission in cognitive radio networks
IEEE Transactions on Communications
An efficient quiet period management scheme for cognitive radio systems
IEEE Transactions on Wireless Communications
Sensing-Throughput Tradeoff for Cognitive Radio Networks
IEEE Transactions on Wireless Communications
Cognitive radio: brain-empowered wireless communications
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
Cyclostationary Signatures in Practical Cognitive Radio Applications
IEEE Journal on Selected Areas in Communications
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In cognitive radio (CR) systems, the efficiency of primary user (PU) detection scheme directly affects the system performance. In this paper, we propose an adaptive sensing scheduling scheme for CR networks with a central controller, which is based on the partially observable Markov decision process (POMDP) framework. With the proposed scheme, the CR system detects the PU activation by using one or more energy detections followed by zero or one feature detection, and protects the PU by using the channel switching. In the proposed scheme, the energy/feature detections and the channel switching are adaptively scheduled according to the number of active CR nodes, the received signal power from a PU, and the degree of noise uncertainty. Simulation results show that the proposed scheme provides very high maximum channel utilization to CR nodes while protecting the PU effectively, under time-varying network environment.