Channel Estimation for TDS-OFDM Systems in Rapidly Time-Varying Mobile Channels

dc.authorscopusid 43261082500
dc.authorscopusid 8662368700
dc.authorscopusid 8941473200
dc.authorscopusid 6701789844
dc.contributor.author Şenol, Habib
dc.contributor.author Erküçük, Serhat
dc.contributor.author Erküçük,S.
dc.contributor.author Çirpan,H.A.
dc.contributor.other Computer Engineering
dc.contributor.other Electrical-Electronics Engineering
dc.date.accessioned 2024-10-15T19:41:57Z
dc.date.available 2024-10-15T19:41:57Z
dc.date.issued 2018
dc.department Kadir Has University en_US
dc.department-temp Basaran M., Istanbul Technical University, Istanbul, 34467, Turkey; Şenol H., Kadir Has University, Istanbul, 34083, Turkey; Erküçük S., Kadir Has University, Istanbul, 34083, Turkey; Çirpan H.A., Istanbul Technical University, Istanbul, 34467, Turkey en_US
dc.description.abstract This 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 bound 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. © 2018 IEEE. en_US
dc.description.sponsorship Türkiye Bilimsel ve Teknolojik Araştirma Kurumu, TÜBITAK, (114E298) en_US
dc.identifier.citationcount 17
dc.identifier.doi 10.1109/TWC.2018.2874228
dc.identifier.endpage 8135 en_US
dc.identifier.issn 1536-1276
dc.identifier.issue 12 en_US
dc.identifier.scopus 2-s2.0-85055032538
dc.identifier.scopusquality Q1
dc.identifier.startpage 8123 en_US
dc.identifier.uri https://doi.org/10.1109/TWC.2018.2874228
dc.identifier.uri https://hdl.handle.net/20.500.12469/6496
dc.identifier.volume 17 en_US
dc.identifier.wosquality Q1
dc.language.iso en en_US
dc.publisher Institute of Electrical and Electronics Engineers Inc. en_US
dc.relation.ispartof IEEE Transactions on Wireless Communications en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.scopus.citedbyCount 18
dc.subject basis expansion model (BEM) en_US
dc.subject Channel estimation en_US
dc.subject rapidly time-varying mobile channels en_US
dc.subject symbol detection en_US
dc.subject time-domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) en_US
dc.title Channel Estimation for TDS-OFDM Systems in Rapidly Time-Varying Mobile Channels en_US
dc.type Article en_US
dspace.entity.type Publication
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