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dc.contributor.authorBaşaran, Mehmet
dc.contributor.authorŞenol, Habib
dc.contributor.authorErküçük, Serhat
dc.contributor.authorÇırpan, Hakan Ali
dc.date.accessioned2020-12-19T18:27:43Z
dc.date.available2020-12-19T18:27:43Z
dc.date.issued2018
dc.identifier.issn1536-1276
dc.identifier.issn1558-2248
dc.identifier.urihttps://doi.org/10.1109/TWC.2018.2874228en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12469/3606
dc.description.abstractThis paper explores the performance of time-domain synchronous orthogonal frequency-division multiplexing (TDS-OFDM) systems operated under rapidly time-varying mobile channels. Since a rapidly time-varying channel contains more unknown channel coefficients than the number of observations, the mobile channel can conveniently be modeled with the discrete Legendre polynomial basis expansion model to reduce the number of unknowns. The linear minimum mean square error (LMMSE) estimate can be exploited for channel estimation on inter-block-interference-free received signal samples owing to transmitting pseudo-noise (PN) sequences. In conventional TDS-OFDM systems, the channel estimation performance is limited due to estimating channel responses only from the beginning part of the channel. Therefore, a new system model named "partitioned TDS-OFDM system" is proposed to improve the system performance by inserting multiple PN sequences to the middle and end parts of the channel as well. In addition to providing the reconstruction error performance, Bayesian Cramer-Rao lower hound is derived analytically. Also, the LMMSE-based symbol detection is employed. To alleviate the negative effects of inter-carrier-interference (ICI) occuring in mobile channels, ICI cancellation is applied to enhance the detection performance. The simulation results demonstrate that the proposed TDS-OFDM system is superior to the conventional system and its corresponding performance is able to approach the achievable lower performance bound.en_US
dc.description.sponsorshipTubitaken_US
dc.language.isoEnglishen_US
dc.publisherIEEE-Inst Electrical Electronics Engineers Incen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectChannel estimationen_US
dc.subjectSymbol detectionen_US
dc.subjectBasis expansion model (BEM)en_US
dc.subjectTime-domain synchronous orthogonal frequency division multiplexing (TDS-OFDM)en_US
dc.subjectRapidly time-varying mobile channelsen_US
dc.titleChannel Estimation for TDS-OFDM Systems in Rapidly Time-Varying Mobile Channelsen_US
dc.typeArticleen_US
dc.identifier.startpage8123en_US
dc.identifier.endpage8135en_US
dc.relation.journalIEEE Transactions on Wireless Communicationsen_US
dc.identifier.issue12en_US
dc.identifier.volume17en_US
dc.identifier.wosWOS:000452623700022en_US
dc.identifier.doi10.1109/TWC.2018.2874228en_US
dc.contributor.khasauthorŞenol, Habiben_US
dc.contributor.khasauthorErküçük, Serhaten_US


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