Precoding decision for full-duplex X-relay channel with Decode-And-Forward
2014 (English)In: IWCMC 2014 - 10th International Wireless Communications and Mobile Computing Conference, IEEE , 2014, 791-796 p.Conference paper (Refereed)
In this paper, we study a simple X-relay configuration where the shared relay operates in full-duplex (FD) mode. The relay node may have limited spatial degrees of freedom, and as a result, it may not be able to handle both the loop interference and the multiuser interference. Hence, a decision on the precoding scheme is necessitated. It is often the case that the relay does not have the option of real-Time switching between different precoding schemes, either due to hardware limitations of the relay or increased complexity of the problem. Hence, we investigate a 'static' precoding decision where the relay node decides on its precoding scheme based only on statistical knowledge of the channel conditions. To perform this decision, the behavior of the system is formulated as a Markov chain and the outage probability of the system is derived in a closed-form with the precoding decision as a parameter. The outage probability is minimized by optimally choosing the precoding scheme, using easily verifiable conditions on the statistical knowledge of the channel conditions. Simulations validate the investigated scheme.
Place, publisher, year, edition, pages
IEEE , 2014. 791-796 p.
Decode-And-Forward, full-duplex relaying, Markov chains, outage probability, precoding design, X-relay channel
IdentifiersURN: urn:nbn:se:kth:diva-157944DOI: 10.1109/IWCMC.2014.6906457ISI: 000361140000135ScopusID: 2-s2.0-84908638666ISBN: 978-147990959-9OAI: oai:DiVA.org:kth-157944DiVA: diva2:774088
10th International Wireless Communications and Mobile Computing Conference, IWCMC 2014, 4 August 2014 through 8 August 2014, Nicosia, Cyprus
QC 201412222014-12-222014-12-182015-10-13Bibliographically approved