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Conference Paper: Channel identifiability of OFDM-CDMA system based on subspace method

TitleChannel identifiability of OFDM-CDMA system based on subspace method
Authors
KeywordsSubspace
OFDM
CDMA
Channel identification
Issue Date2003
PublisherIEEE.
Citation
Joint Conference on the 4th International Conference on Information, Communications and Signal Processing and the 4th Pacific Rim Conference on Multimedia Proceedings, Singapore, 15-18 Dec 2003, v. 1, p. 663-667 How to Cite?
AbstractSubspace method is well-known in CDMA channel estimation. But a basic problem, channel identifiability by subspace method, is still not well-solved. In this paper, two subspace based blind methods for estimating the channel responses of a OFDM-CDMA system in downlink and uplink are discussed respectively. Under some reasonable assumptions, it is mathematically proved that subspace method for downlink can estimate the channel subject to a scalar ambiguity, and the method for uplink can give the channel responses subject to a diagonal matrix ambiguity. The methods do not need precise channel order information (only an upper bound for the orders is required). Simulations show that the methods are effective and robust.
Persistent Identifierhttp://hdl.handle.net/10722/46496

 

DC FieldValueLanguage
dc.contributor.authorZeng, Yen_HK
dc.contributor.authorNg, TSen_HK
dc.date.accessioned2007-10-30T06:51:16Z-
dc.date.available2007-10-30T06:51:16Z-
dc.date.issued2003en_HK
dc.identifier.citationJoint Conference on the 4th International Conference on Information, Communications and Signal Processing and the 4th Pacific Rim Conference on Multimedia Proceedings, Singapore, 15-18 Dec 2003, v. 1, p. 663-667en_HK
dc.identifier.urihttp://hdl.handle.net/10722/46496-
dc.description.abstractSubspace method is well-known in CDMA channel estimation. But a basic problem, channel identifiability by subspace method, is still not well-solved. In this paper, two subspace based blind methods for estimating the channel responses of a OFDM-CDMA system in downlink and uplink are discussed respectively. Under some reasonable assumptions, it is mathematically proved that subspace method for downlink can estimate the channel subject to a scalar ambiguity, and the method for uplink can give the channel responses subject to a diagonal matrix ambiguity. The methods do not need precise channel order information (only an upper bound for the orders is required). Simulations show that the methods are effective and robust.en_HK
dc.format.extent319312 bytes-
dc.format.extent21012 bytes-
dc.format.extent21377 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofJoint Conference on the 4th International Conference on Information, Communications and Signal Processing and the 4th Pacific Rim Conference on Multimedia Proceedings-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©2003 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.subjectSubspaceen_HK
dc.subjectOFDMen_HK
dc.subjectCDMAen_HK
dc.subjectChannel identificationen_HK
dc.titleChannel identifiability of OFDM-CDMA system based on subspace methoden_HK
dc.typeConference_Paperen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/ICICS.2003.1292537en_HK
dc.identifier.hkuros92859-

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