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dc.contributor.authorMyllylä, Markus
Cavallaro, Joseph R.
Juntti, Markku 2012-06-04T15:06:19Z 2012-06-04T15:06:19Z 2010-10-01
dc.identifier.citation M. Myllylä, J. R. Cavallaro and M. Juntti, "Implementation aspects of list sphere decoder algorithms for MIMO-OFDM systems," Elsevier Journal on Signal Processing, vol. 90, no. 10, 2010.
dc.description.abstract A 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.
dc.description.sponsorship Tekes
dc.description.sponsorship Finnish Funding Agency for Technology and Innovation
dc.description.sponsorship Nokia
dc.description.sponsorship Nokia Siemens Networks (NSN)
dc.description.sponsorship Elekrobit
dc.description.sponsorship Uninord
dc.language.iso eng
dc.publisher Elsevier
List sphere detector (LSD)
Soft-output detector
dc.title Implementation aspects of list sphere decoder algorithms for MIMO-OFDM systems
dc.type Journal article
dc.citation.journalTitle Elsevier Journal on Signal Processing Center for Multimedia Communication
dc.citation.volumeNumber 90
dc.citation.issueNumber 10
dc.type.dcmi Text
dc.type.dcmi Text
dc.citation.firstpage 2863
dc.citation.lastpage 2876

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  • ECE Publications [1391]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students
  • Rice Wireless [268]
    Publications by Rice Faculty and graduate students in the Rice Wireless group

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