Improving Collaborative Transmit Diversity by Using Constellation Rearrangement
2007 (English)In: IEEE Wireless Communications and Networking Conference, WCNC, 2007, 804-808 p.Conference paper (Refereed)
We propose an enhancement to cooperative transmit diversity based on uncoded detect-and-forward, by using so-called constellation rearrangement (CR) at the relay. With CR, the relay uses a bit-symbol mapping that is different from the one used by the source. We find the optimal bit-symbol mappings for both the source and the relay and the associated optimal detectors, and show that the improvement over conventional relaying with Gray mapping at the source and the relay can amount to a power gain of several dB. This performance improvement comes at no additional power or bandwidth expense, and at virtually no increase in complexity.
Place, publisher, year, edition, pages
2007. 804-808 p.
, IEEE Wireless Communications and Networking Conference, ISSN 1525-3511
Bandwidth, Diversity reception, Signal detection, Telecommunication systems, Collaborative transmit diversity, Constellation rearrangement, Optimal bit-symbol mappings, Optimal detectors
IdentifiersURN: urn:nbn:se:kth:diva-8302DOI: 10.1109/WCNC.2007.153ISI: 000252337101059ScopusID: 2-s2.0-36349018202ISBN: 1424406595ISBN: 978-142440659-3OAI: oai:DiVA.org:kth-8302DiVA: diva2:13587
2007 IEEE Wireless Communications and Networking Conference, WCNC 2007; Kowloon; China; 11 March 2007 through 15 March 2007
Conference: IEEE Wireless Communications and Networking Conference. Hong Kong, PEOPLES R CHINA. MAR 11-15, 20072008-04-302008-04-302015-07-15Bibliographically approved