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Cognitive MIMO relaying in Nakagami-m fading
Blekinge Institute of Technology, School of Computing.
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2013 (English)Conference paper (Refereed)
Abstract [en]

We propose transmit antenna selection with receive maximal-ratio combining (TAS/MRC) as an effective approach to reduce interference in cognitive multiple-input multiple-output (MIMO) relay networks. To demonstrate this, we derive new closed-form expressions for the exact and asymptotic outage probability of TAS/MRC with multiple antennas at the primary and secondary users. We consider underlay spectrum sharing where the secondary users (SUs) transmit in the presence of multiple primary users (PUs). We consider independent Nakagami-m fading in both the primary and secondary networks. Several important design insights are revealed. We find that TAS/MRC achieves a full diversity when the transmit power at the SUs is proportional to the peak interference power at the PUs. Furthermore, we highlight that this diversity gain is completely independent of the number of antennas at the PUs.

Place, publisher, year, edition, pages
Dresden: IEEE , 2013.
Keyword [en]
Asymptotic outage probabilities, Closed-form expression, Effective approaches, Interference power, Maximal ratio combining (MRC), Secondary networks, Transmit antenna selection, Underlay spectrum sharing
National Category
Computer Science
URN: urn:nbn:se:bth-6751DOI: 10.1109/VTCSpring.2013.6692480Local ID: 978-146736337-2OAI: diva2:834289
IEEE 77th Vehicular Technology Conference, VTC
Available from: 2014-03-25 Created: 2014-03-25 Last updated: 2016-04-21Bibliographically approved

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