Implementation of LS, MMSE and SAGE Channel Estimators for Mobile MIMO-OFDM

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dc.citation.conferenceDate2012en_US
dc.citation.conferenceName2012 IEEE Asilomar Conference on Signals, Systems, and Computersen_US
dc.citation.locationPacific Grove, GAen_US
dc.contributor.authorKetonen, Johanna
dc.contributor.authorJuntti, Markku
dc.contributor.authorYlioinas, Jari
dc.contributor.authorCavallaro, Joseph R.
dc.contributor.orgCMCen_US
dc.date.accessioned2012-12-05T16:04:21Z
dc.date.available2012-12-05T16:04:21Z
dc.date.issued2012-12-01eng
dc.description.abstractThe use of decision directed (DD) channel estimation in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) downlink receiver is studied in this paper. The 3GPP long term evolution (LTE) based pilot structure is used as a benchmark. The space-alternating generalized expectation-maximization (SAGE) algorithm is used to improve the performance from that of the pilot symbol based least-squares (LS) channel estimator. The DD channel estimation improves the performance with high user velocities, where the pilot symbol density is not sufficient. Minimum mean square error (MMSE) filtering can also be used in estimating the channel in between pilot symbols. The DD channel estimation can be used to reduce the pilot overhead without any performance degradation by transmitting data instead of pilot symbols. The pilot overhead is reduced to a third of the LTE pilot overhead, obtaining a ten percent increase in throughput. The pilot based LS, MMSE and the SAGE channel estimators are implemented and the performance-complexity trade-offs are studied.en_US
dc.identifier.citationJ. Ketonen, M. Juntti, J. Ylioinas and J. R. Cavallaro, "Implementation of LS, MMSE and SAGE Channel Estimators for Mobile MIMO-OFDM," 2012.*
dc.identifier.doihttp://dx.doi.org/10.1109/ACSSC.2012.6489188en_US
dc.identifier.urihttps://hdl.handle.net/1911/68436
dc.language.isoengen
dc.publisherIEEEen_US
dc.subjectMIMOen_US
dc.subject3GPP LTEen_US
dc.subjectDD Channelen_US
dc.subjectMMSEen_US
dc.titleImplementation of LS, MMSE and SAGE Channel Estimators for Mobile MIMO-OFDMen_US
dc.typeConference paperen_US
dc.type.dcmiTexten
dc.type.dcmiTexten_US
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