Improved Beamforming for Radio Links with Multi-Level Linearly Modulated Signals
2009 (English)In: 2009 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, 2009, 913-917 p.Conference paper (Refereed)
Multiple constellations has been proposed recently as a way of improving the system performance when used in conjunction with Orthogonal Transmit Diversity (OTD) for high level linear modulation schemes. This paper considers the use of multiple constellations in Multiple Input Multiple Output (MIMO) antenna systems. The premise is that the same modulation scheme is used with different bits to symbols mapping for each branch. This improved beamforming results in better performance as compared to MIMO-MRC where the same bits to symbols mapping is used on all branches. Analytical expression for Symbol Error Probability (SEP) is derived. The results obtained show that the new proposed improved beamforming scheme outperforms conventional MIMO-MRC with a performance dividend that increases with the linear modulation level.
Place, publisher, year, edition, pages
2009. 913-917 p.
, IEEE Wireless Communications and Networking Conference, ISSN 1525-3511
Analytical expressions, Linear modulations, Linearly modulated signals, Modulation schemes, Multi-level, Multiple-input-multiple-output antenna systems, Orthogonal transmit diversity, Symbol error probability, Beamforming, Cellular radio systems, Modulation, Multiplexing, Probability, Radio links, Rayleigh scattering
Computer and Information Science
IdentifiersURN: urn:nbn:se:kth:diva-30397DOI: 10.1109/WCNC.2009.4917746ISI: 000272057700164ScopusID: 2-s2.0-70349182673ISBN: 978-1-4244-2947-9OAI: oai:DiVA.org:kth-30397DiVA: diva2:401076
IEEE Wireless Communications and Networking Conference, Budapest, HUNGARY, APR 05-08, 2009
QC 201103012011-03-012011-02-242011-03-01Bibliographically approved