A Computational Approach to Edge Detection
IEEE Transactions on Pattern Analysis and Machine Intelligence
A case for adapting channel width in wireless networks
Proceedings of the ACM SIGCOMM 2008 conference on Data communication
Learning to share: narrowband-friendly wideband networks
Proceedings of the ACM SIGCOMM 2008 conference on Data communication
Sora: high performance software radio using general purpose multi-core processors
NSDI'09 Proceedings of the 6th USENIX symposium on Networked systems design and implementation
Frequency-aware rate adaptation and MAC protocols
Proceedings of the 15th annual international conference on Mobile computing and networking
Predictable 802.11 packet delivery from wireless channel measurements
Proceedings of the ACM SIGCOMM 2010 conference
Supporting demanding wireless applications with frequency-agile radios
NSDI'10 Proceedings of the 7th USENIX conference on Networked systems design and implementation
The spaces between us: setting and maintaining boundaries in wireless spectrum access
Proceedings of the sixteenth annual international conference on Mobile computing and networking
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Proliferation and innovation of wireless technologies require significant amounts of radio spectrum. Recent policy reforms by the FCC are paving the way by freeing up spectrum for a new generation of frequency-agile wireless devices based on software defined radios (SDRs). But despite recent advances in SDR hardware, research on SDR MAC protocols or applications requires an experimental platform for managing physical access. We introduce Papyrus, a software platform for wireless researchers to develop and experiment dynamic spectrum systems using currently available SDR hardware. Papyrus provides two fundamental building blocks at the physical layer: flexible non-contiguous frequency access and simple and robust frequency detection. Papyrus allows researchers to deploy and experiment new MAC protocols and applications on USRP GNU Radio, and can also be ported to other SDR platforms. We demonstrate the use of Papyrus using Jello, a distributed MAC overlay for high-bandwidth media streaming applications and Ganache, a SDR layer for adaptable guardband configuration. Full implementations of Papyrus and Jello are publicly available.