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Power allocation for energy-constrained cognitive radios in the presence of an eavesdropper
(Signal Processing)ORCID iD: 0000-0003-2298-6774
2014 (English)In: 2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), IEEE conference proceedings, 2014, 5695-5699 p.Conference paper, Published paper (Refereed)
Abstract [en]

Reliable and agile spectrum sensing as well as secure communication are key requirements of a cognitive radio system. In this paper, secrecy throughput of a cognitive radio is maximized in order to determine the sensing threshold, the sensing time, and the transmission power. Constraints of the problem are defined as a lower-bound on the detection probability, an upper-bound on the average energy consumption per time-frame, and the maximum transmission power of the cognitive radio. We show that the problem can be solved by an on-off strategy where the cognitive radio only performs sensing and transmits data if the cognitive channel gain is greater than the average eavesdropper channel gain. The problem is then solved by a line-search over sensing time. Eventually, the secrecy throughput of the cognitive radio is evaluated employing the IEEE 802.15.4/Zig-Bee standard.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2014. 5695-5699 p.
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-163733DOI: 10.1109/ICASSP.2014.6854694Scopus ID: 2-s2.0-84905280892OAI: oai:DiVA.org:kth-163733DiVA: diva2:1082092
Conference
IEEE ICASSP
Note

QC 20170321

Available from: 2017-03-15 Created: 2017-03-15 Last updated: 2017-03-21Bibliographically approved

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Ottersten, Björn
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  • apa
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