Telos: enabling ultra-low power wireless research
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Chicago spectrum occupancy measurements & analysis and a long-term studies proposal
TAPAS '06 Proceedings of the first international workshop on Technology and policy for accessing spectrum
Experimental study of spectrum sensing based on energy detection and network cooperation
TAPAS '06 Proceedings of the first international workshop on Technology and policy for accessing spectrum
Efficient Discovery of Spectrum Opportunities with MAC-Layer Sensing in Cognitive Radio Networks
IEEE Transactions on Mobile Computing
Power-Law Distributions in Empirical Data
SIAM Review
Full length article: Empirical time and frequency domain models of spectrum use
Physical Communication
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
Spectrum occupancy validation and modeling using real-time measurements
Proceedings of the 2010 ACM workshop on Cognitive radio networks
Routing in cognitive radio networks: Challenges and solutions
Ad Hoc Networks
Cross-layer optimal spectrum sensing duration and scheduling in cognitive networks
CoRoNet '11 Proceedings of the 3rd ACM workshop on Cognitive radio networks
Spectrum Sensing Framework for Cognitive Radio Networks
Wireless Personal Communications: An International Journal
An overview of spectrum occupancy models for cognitive radio networks
NETWORKING'11 Proceedings of the IFIP TC 6th international conference on Networking
Estimation of expectable network quality in wireless mesh networks
IFIP'12 Proceedings of the 2012 international conference on Networking
Building efficient spectrum-agile devices for dummies
Proceedings of the 18th annual international conference on Mobile computing and networking
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Several measurement campaigns have shown that numerous spectrum bands are vacant although licenses have been issued by the regulatory agencies. Dynamic spectrum access (DSA) has been proposed in order to alleviate this problem and increase the spectral utilization. In this paper we present our spectrum measurement setup and discuss lessons learned during our measurement activities. We compare measurement results gathered at three locations and show differences in the background noise processes. Additionally, we introduce a new model for the duty cycle distribution that has multiple applications in the DSA research. We point out that fully loaded and completely vacant channels should be modelled explicitly and discuss the impact of duty cycle correlation in the frequency domain. Finally, we evaluate the efficiency of an adaptive spectrum sensing process as an example for applications of the introduced model.