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Combined Transmitter Diversity and Multi-Level Modulation Techniques
KTH, Skolan för informations- och kommunikationsteknik (ICT), Kommunikationssystem, CoS. (Radio Communication Systems)ORCID-id: 0000-0001-9697-9978
2005 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Orthogonal transmitter diversity such as frequency diversity and time diversity is quite simple to implementand, with optimum signal combining, can take full advantage of fading multipath channels. However, such a scheme has a bandwidth efficiency that decreases inversely with the number of diversity branches making it less attractive in wireless communications applications. This paper considers combined orthogonal transmitter diversity and multi-level linear modulation techniques. The idea is to view the signal constellations of the modulation scheme in an augmented signal space formed by the modulation signal dimension and the number of branches of the transmitter diversityscheme. This augmented signal space provides a good spread for the modulation signal points and can be quite efficientfor high-level linear modulation techniques. The obtained results show that this combined scheme, not only improves the system performance in both additive white Gaussian noise and fading multipath channels, but also improves the bandwidth efficiency of orthogonal transmitter diversity.

Ort, förlag, år, upplaga, sidor
IEEE , 2005.
Nyckelord [en]
Orthogonal transmitter diversity, multi-level linear modulation, diversity gain, bandwidth efficiency, wireless communications
Nationell ämneskategori
Data- och informationsvetenskap
Forskningsämne
SRA - Informations- och kommunikationsteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-29797OAI: oai:DiVA.org:kth-29797DiVA, id: diva2:398106
Konferens
The 3rd International conference on Sciences of Electronic, Technologies of Information and Telecommunications
Anmärkning
QC 20110217Tillgänglig från: 2011-02-16 Skapad: 2011-02-16 Senast uppdaterad: 2018-01-12Bibliografiskt granskad

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