On the Performance Advantage of Relaying under the Finite Blocklength Regime
2015 (English)In: IEEE Communications Letters, ISSN 1089-7798, Vol. 19, no 5, 779-782 p.Article in journal (Refereed) Published
We consider a two-phase relaying system with finite blocklengths. We study the performance difference of relaying under the finite blocklength regime as well as under the Shannon capacity regime. Most importantly, we are interested in the conditions that lead to a higher performance of relaying under the finite blocklength regime. We find that these situations are characterized by error probabilities of relaying, e.g., the overall error probability of relaying and the error probability of the bottleneck link of relaying. We identify scenarios where relaying outperforms direct transmission under the finite blocklength regime even if their performances are similar under the Shannon capacity regime. Moreover, we prove that under these scenarios the performance advantage of relaying is more significant with short blocklengths. Finally, numerical results are provided and discussed.
Place, publisher, year, edition, pages
IEEE Communications Society, 2015. Vol. 19, no 5, 779-782 p.
Finite blocklength, relaying, coding rate, error probability
IdentifiersURN: urn:nbn:se:kth:diva-165941DOI: 10.1109/LCOMM.2015.2410770ISI: 000354466200021OAI: oai:DiVA.org:kth-165941DiVA: diva2:809169
FunderICT - The Next Generation
QC 201506042015-04-302015-04-302015-06-11Bibliographically approved