Transmit antenna selection in cognitive relay networks with Nakagami-m fading
2013 (English)Conference paper (Refereed)
We examine the impact of multiple primary receivers on cognitive multiple-input multiple-output (MIMO) relay networks with underlay spectrum sharing. For such a network, we propose transmit antenna selection with receive maximal-ratio combining (TAS/MRC) as an interference-aware design to satisfy the power constraints in the primary and secondary networks. To demonstrate this, we derive new closed-form expressions for the exact and asymptotic outage probability with TAS/MRC and decode-and-forward (DF) relaying over independent Nakagami-m fading channels in the primary and secondary networks. Several important design insights are reached. We find that the TAS/MRC strategy achieves a full diversity gain when the transmit power in the secondary network is proportional to the peak interference power in the primary network. Furthermore, we highlight that the diversity-multiplexing tradeoff (DMT) of TAS/MRC is independent of the primary network and entirely dependent on the secondary network.
Place, publisher, year, edition, pages
Budapest: IEEE , 2013.
Asymptotic outage probabilities, Cognitive relay networks, Decodeandforward relaying, Diversity-multiplexing tradeoffs (DMT), Maximal ratio combining (MRC), Nakagami-m fading channels, Transmit antenna selection, Underlay spectrum sharing
IdentifiersURN: urn:nbn:se:bth-6358DOI: 10.1109/ICC.2013.6654959ISI: 000349673802031Local ID: oai:bth.se:forskinfoCFDC19BCA0F4860FC1257CBB002ECA36ISBN: 978-146733122-7OAI: oai:DiVA.org:bth-6358DiVA: diva2:833856
IEEE International Conference on Communications (ICC)