Recovering multiplexing loss through concurrent decode-and-forward (DF) relaying
2009 (English)In: Wireless personal communications, ISSN 0929-6212, E-ISSN 1572-834X, Vol. 48, no 1, 193-213 p.Article in journal (Refereed) Published
In this paper, we develop a novel digital cooperative diversity transmission protocol for a two-source scenario by combining the two sources' two classic decode-and-forward (DF) relaying steps and using 2L + 1 time slots to transmit L codewords from each source. Assuming the relays can perfectly decode their associated source messages, we give an information-theoretic average achievable capacity region for this transmission scheme. Through diversity-multiplexing tradeoff analysis, we show that our so called concurrent DF relaying protocol can effectively recover the multiplexing loss induced by the half-duplex operation in the relays, while still obtaining some diversity gain. Numerical results reveal our scheme offers significant performance advantages over the classic DF relaying protocols, especially for high signal-to-noise ratio (SNR) and large frame length L regime.
Place, publisher, year, edition, pages
2009. Vol. 48, no 1, 193-213 p.
Cooperative diversity, Concurrent decode-and-forward (DF) relaying, Capacity region, Diversity-multiplexing tradeoff
Research subject SRA - ICT
IdentifiersURN: urn:nbn:se:kth:diva-52466DOI: 10.1007/s11277-007-9421-xISI: 000261599400011OAI: oai:DiVA.org:kth-52466DiVA: diva2:466924
QC 201201092011-12-172011-12-172012-01-09Bibliographically approved