Show simple item record

dc.contributor.authorPanayırcı, E.
dc.contributor.authorŞenol, H.
dc.contributor.authorUysal, Murat
dc.contributor.authorPoor, H. V.
dc.date.accessioned2015-12-01T07:48:19Z
dc.date.available2015-12-01T07:48:19Z
dc.date.issued2016-01-01
dc.identifier.issn1053-587X
dc.identifier.urihttp://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=7254230
dc.identifier.urihttp://hdl.handle.net/10679/1213
dc.descriptionDue to copyright restrictions, the access to the full text of this article is only available via subscription.en_US
dc.description.abstractThis paper is concerned with a challenging problem of channel estimation and equalization for amplifyand- forward cooperative relay based orthogonal frequency division multiplexing (OFDM) systems in sparse underwater acoustic (UWA) channels. The sparseness of the channel impulse response and prior information for the non-Gaussian channel gains, modeled by an exact continuous Gaussian mixture (CGM), are exploited to improve the performance of the channel estimation algorithm. The resulting novel algorithm initially estimates the overall sparse complex-valued channel taps from the source to the destination as well as their locations using the matching pursuit (MP) approach. The effective time-domain non- Gaussian noise is approximated well as a Gaussian noise in the frequency-domain, where the estimation takes place. An efficient and low complexity algorithm is developed based on the combinations of the MP and the maximum a posteriori probability (MAP) based space-alternating generalized expectationmaximization technique, to improve the estimates of the channel taps and their locations in an iterative way. Computer simulations show that the UWA channel is estimated very effectively and the proposed algorithm exhibits excellent symbol error rate and channel estimation performance.en_US
dc.description.sponsorshipTÜBİTAK ; NSF
dc.language.isoengen_US
dc.publisherIEEEen_US
dc.relationinfo:turkey/grantAgreement/TUBITAK/110E092en_US
dc.relation.ispartofIEEE Transactions on Signal Processing
dc.rightsrestrictedAccess
dc.titleSparse channel estimation and equalization for OFDM-based underwater cooperative systems with amplify-and-forward relayingen_US
dc.typeArticleen_US
dc.peerreviewedyesen_US
dc.publicationstatuspublisheden_US
dc.contributor.departmentÖzyeğin University
dc.contributor.authorID124615
dc.contributor.ozuauthorUysal, Murat
dc.identifier.wosWOS:000366834300016
dc.subject.keywordsUnderwater Acoustic Channel Estimationen_US
dc.subject.keywordsOFDMen_US
dc.subject.keywordsAF Relayingen_US
dc.subject.keywordsSAGEen_US
dc.subject.keywordsMatching Pursuiten_US
dc.subject.keywordsContinuous gaussian mixtureen_US
dc.identifier.scopusSCOPUS:2-s2.0-85009351657
dc.contributor.authorMale1


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record


Share this page