Parallel Searching-Based Sphere Detector for MIMO Downlink OFDM Systems

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dc.citation.firstpage3240
dc.citation.issueNumber6en_US
dc.citation.journalTitleIEEE Transactions on Signal Processingen_US
dc.citation.lastpage3252
dc.citation.volumeNumber60en_US
dc.contributor.authorRadosavljevic, Predrag
dc.contributor.authorKim, Kyeong Jin
dc.contributor.authorShen, Hao
dc.contributor.authorCavallaro, Joseph R.
dc.contributor.orgCenter for Multimedia Communicationen_US
dc.date.accessioned2012-06-27T16:12:30Z
dc.date.available2012-06-27T16:12:30Z
dc.date.issued2012-06-01eng
dc.description.abstractIn this paper, implementation of a detector with parallel partial candidate-search algorithm is described. Two fully independent partial candidate search processes are simultaneously employed for two groups of transmit antennas based on QR decomposition (QRD) and QL decomposition (QLD) of a multiple-input multiple-output (MIMO) channel matrix. By using separate simultaneous candidate searching processes, the proposed implementation of QRD-QLD searching-based sphere detector provides a smaller latency and a lower computational complexity than the original QRD-M detector for similar error-rate performance in wireless communications systems employing four transmit and four receive antennas with 16-QAM or 64-QAM constellation size. It is shown that in coded MIMO orthogonal frequency division multiplexing (MIMO OFDM) systems, the detection latency and computational complexity of a receiver can be substantially reduced by using the proposed QRD-QLD detector implementation. The QRD-QLD-based sphere detector is also implemented using Field Programmable Gate Array (FPGA) and application specific integrated circuit (ASIC), and its hardware design complexity is compared with that of other sphere detectors reported in the literature.en_US
dc.description.sponsorshipNokia Renesas Mobileen_US
dc.description.sponsorshipTexas Instrumentsen_US
dc.description.sponsorshipXilinxen_US
dc.description.sponsorshipNational Science Foundationen_US
dc.identifier.citationP. Radosavljevic, K. J. Kim, H. Shen and J. R. Cavallaro, "Parallel Searching-Based Sphere Detector for MIMO Downlink OFDM Systems," <i>IEEE Transactions on Signal Processing,</i> vol. 60, no. 6, 2012.*
dc.identifier.doihttp://dx.doi.org/10.1109/TSP.2012.2190595en_US
dc.identifier.otherhttp://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6168288&tag=1
dc.identifier.urihttps://hdl.handle.net/1911/64347
dc.language.isoengen
dc.publisherIEEEen_US
dc.subjectASICen_US
dc.subjectBounded soft sphere detectoren_US
dc.subjectField programmable gate array (FPGA)en_US
dc.subjectImplementation complexityen_US
dc.subjectLatency analysisen_US
dc.subjectQL decomposition (QLD)en_US
dc.subjectQR decomposition (QRD)en_US
dc.subjectQRD-Men_US
dc.subjectQRD-QLD-based parallel candidate searchen_US
dc.titleParallel Searching-Based Sphere Detector for MIMO Downlink OFDM Systemsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten
dc.type.dcmiTexten_US
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