Implementation aspects of list sphere decoder algorithms for MIMO-OFDM systems

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dc.citation.firstpage2863en_US
dc.citation.issueNumber10en_US
dc.citation.journalTitleElsevier Journal on Signal Processingen_US
dc.citation.lastpage2876en_US
dc.citation.volumeNumber90en_US
dc.contributor.authorMyllylä, Markusen_US
dc.contributor.authorCavallaro, Joseph R.en_US
dc.contributor.authorJuntti, Markkuen_US
dc.contributor.orgCenter for Multimedia Communicationen_US
dc.date.accessioned2012-06-04T15:06:19Zen_US
dc.date.available2012-06-04T15:06:19Zen_US
dc.date.issued2010-10-01en_US
dc.description.abstractA list sphere decoder (LSD) can be used to approximate the optimal maximum a posteriori (MAP) detector for the detection of multiple-input multiple-output (MIMO) signals. In this paper, we consider two LSD algorithms with different search methods and study some algorithm design choices which relate to the performance and computational complexity of the algorithm. We show that by limiting the dynamic range of log-likelihood ratio, the required LSD list size can be lowered, and, thus, the complexity of the LSD algorithm is decreased. We compare the real and the complex-valued signal models and their impact on the complexity of the algorithms. We show that the real-valued signal model is clearly the less complex choice and a better alternative for implementation. We also show the complexity of the sequential search LSD algorithm can be reduced by limiting the maximum number of checked nodes without sacrificing the performance of the system. Finally, we study the complexity and performance of an iterative receiver, analyze the tradeoff choices between complexity and performance, and show that the additional computational cost in LSD is justified to get better soft-output approximation.en_US
dc.description.sponsorshipTekesen_US
dc.description.sponsorshipFinnish Funding Agency for Technology and Innovationen_US
dc.description.sponsorshipNokiaen_US
dc.description.sponsorshipNokia Siemens Networks (NSN)en_US
dc.description.sponsorshipElekrobiten_US
dc.description.sponsorshipUninorden_US
dc.identifier.citationM. Myllylä, J. R. Cavallaro and M. Juntti, "Implementation aspects of list sphere decoder algorithms for MIMO-OFDM systems," <i>Elsevier Journal on Signal Processing,</i> vol. 90, no. 10, 2010.en_US
dc.identifier.doihttp://dx.doi.org/10.1016/j.sigpro.2010.04.014en_US
dc.identifier.otherhttp://scholar.google.com/scholar?cluster=13831749919612497674&hl=en&as_sdt=0,44en_US
dc.identifier.urihttps://hdl.handle.net/1911/64207en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.subjectMIMOen_US
dc.subjectList sphere detector (LSD)en_US
dc.subjectSoft-output detectoren_US
dc.subjectImplementationen_US
dc.titleImplementation aspects of list sphere decoder algorithms for MIMO-OFDM systemsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.dcmiTexten_US
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