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dc.contributor.authorHung, Kun-Chienen_US
dc.contributor.authorLin, David W.en_US
dc.date.accessioned2014-12-08T15:07:58Z-
dc.date.available2014-12-08T15:07:58Z-
dc.date.issued2010-01-01en_US
dc.identifier.issn0018-9545en_US
dc.identifier.urihttp://dx.doi.org/10.1109/TVT.2009.2029862en_US
dc.identifier.urihttp://hdl.handle.net/11536/6270-
dc.description.abstractIn linear-minimum-mean-square-error (LMMSE) channel estimation for multicarrier systems, one needs to know the channel correlation function. This poses a problem for systems with a small number of pilots operating in time-varying channels. We propose to approximate the channel power-delay profile (PDP) with a shape that can completely be described in two parameters, namely, the mean delay and the root-mean-square (RMS) delay spread. Furthermore, we develop a simple technique to estimate these delay parameters. The approximate PDP is then used to generate the LMMSE filter coefficients for data-subcarrier channel estimation. Mathematical expressions are derived that can be used to predict the accuracy of the various estimates, and they are verified by simulation. The proposed technique is applicable to both point-to-point communication and multiaccess communication where different users may experience different channel conditions. As a practical application, we also specialize the proposed technique to Mobile WiMAX signals and investigate the resulting performance.en_US
dc.language.isoen_USen_US
dc.subjectChannel estimationen_US
dc.subjectIEEE 802.16een_US
dc.subjectMobile WiMAXen_US
dc.subjectorthogonal frequency-division multiple access (OFDMA)en_US
dc.subjectorthogonal frequency-division multiplexing (OFDM)en_US
dc.subjectroot-mean-square (RMS) delay spreaden_US
dc.titlePilot-Based LMMSE Channel Estimation for OFDM Systems With Power-Delay Profile Approximationen_US
dc.typeArticleen_US
dc.identifier.doi10.1109/TVT.2009.2029862en_US
dc.identifier.journalIEEE TRANSACTIONS ON VEHICULAR TECHNOLOGYen_US
dc.citation.volume59en_US
dc.citation.issue1en_US
dc.citation.spage150en_US
dc.citation.epage159en_US
dc.contributor.department電子工程學系及電子研究所zh_TW
dc.contributor.departmentDepartment of Electronics Engineering and Institute of Electronicsen_US
dc.identifier.wosnumberWOS:000273698400015-
dc.citation.woscount12-
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