NDLI: Multi-hop cognitive radio networking through beamformed underlay secondary access

Content Provider	IEEE Xplore Digital Library
Author	Akhtar, A.M. De Nardis, L. Nakhai, M.R. Holland, O. Di Benedetto, M.G. Aghvami, A.H.
Copyright Year	2013
Description	Author affiliation: Inst. of Telecommun., King's Coll. London, London, UK (Akhtar, A.M.; Nakhai, M.R.; Holland, O.; Aghvami, A.H.) \|\| DIET Dept., Sapienza Univ. of Rome, Rome, Italy (De Nardis, L.; Di Benedetto, M.G.)
Abstract	This paper introduces a transmit beamforming strategy taking into account the positions of primary, secondary victim and intended secondary receivers, to achieve underlay secondary access in multihop cognitive radio networking. The transmit beamforming strategy defines a novel path optimization scheme that deviates from a preselected path given by the routing module, based on local information and according to a relay selection metric. This metric is designed to improve both coexistence with primary/secondary victim receivers and performance of the secondary cognitive network. Simulations compare the proposed strategy with a baseline solution that does not adopt beamforming, and with a strategy that applies beamforming on each hop without modifying the original path. Results show that the proposed strategy is capable of improving coexistence with primary/secondary victims, and highlight that a trade-off exists between the meeting of coexistence constraints and maximisation of secondary network performance.
Starting Page	2863
Ending Page	2868
File Size	241994
Page Count	6
File Format	PDF
ISBN	9781467331227
ISSN	15503607
DOI	10.1109/ICC.2013.6654975
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-09
Publisher Place	Hungary
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Array signal processing Interference Routing Receivers Relays Measurement Cognitive radio routing Beamforming cognitive radio multi-hop power control
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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