Interference Detection Based on AIC Using EM Algorithm for UWB MB-OFDM Systems
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Spectrum sensing in wideband OFDM cognitive radios
IEEE Transactions on Signal Processing
Impact of Ultra Wide Band emission on WiMAX systems at 2.5 and 3.5GHz
Computer Networks: The International Journal of Computer and Telecommunications Networking
Dynamic spectrum access and management
IEEE Wireless Communications
Cyclic prefix design and allocation in bit-loaded OFDM over power line communication channels
IEEE Transactions on Communications
EURASIP Journal on Wireless Communications and Networking
Clearing the RF smog: making 802.11n robust to cross-technology interference
Proceedings of the ACM SIGCOMM 2011 conference
Reclaiming the white spaces: spectrum efficient coexistence with primary users
Proceedings of the Seventh COnference on emerging Networking EXperiments and Technologies
Weeble: enabling low-power nodes to coexist with high-power nodes in white space networks
Proceedings of the 8th international conference on Emerging networking experiments and technologies
Adaptive Spectrum Sensing Algorithm in Cognitive Ultra-wideband Systems
Wireless Personal Communications: An International Journal
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Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty. Spectral cognition of this form can also be used by regulators to facilitate the dynamic coexistence of different service types. An example of this is the operation of ultra-wideband devices in WiMAX bands: UWB devices must detect and avoid WiMAX devices in certain regulatory domains. In this article we start by discussing various options for detection and avoidance. We then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality. Finally, we present measurement results for operation of a single UWB device with a WiMAX system. This interaction also highlights the problem of dealing with listen before speak primaries where secondary transmission could interfere by blocking the primary's access to the medium.