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Article: Robust Channel Estimation and Multiuser Detection for MC-CDMA Systems under Narrowband Interference

TitleRobust Channel Estimation and Multiuser Detection for MC-CDMA Systems under Narrowband Interference
Authors
KeywordsLeast-squares (WLS) techniques
Narrowband interference (NBI)
Wireless communications
Code division multiple access
Multiuser detection
Issue Date2008
PublisherSpringer New York LLC. The Journal's web site is located at http://springerlink.metapress.com/content/120889/
Citation
Journal of Signal Processing Systems, 2008, v. 52 n. 2, p. 165-180 How to Cite?
AbstractIn this paper, we present a robust adaptive channel estimator and a robust multiuser detector for wireless multicarrier code-division multiple access (MC–CDMA) systems under narrowband interference (NBI). The conventional least-squares (LS) channel estimator performs poorly when narrowband interfering signals contaminate the multicarrier systems. A new weighted recursive least M-estimate (WRLM) channel estimator is hence developed to estimate multipath fading channels in the presence of NBI. The new robust channel estimator resorts to M-estimate and weighted least-squares (WLS) techniques. Simulations show that the WRLM channel estimator offers substantial performance gain over conventional recursive least-squares (RLS), recursive least M-estimate (RLM) and weighted RLS (WRLS) channel estimators under NBI. With the estimated channel coefficients, a robust multiuser detector is proposed to jointly suppress multiple access interference (MAI) and NBI. The performance of the linear decorrelator will degrade substantially in the presence of NBI. A weighted least M-estimate (WLM) algorithm is therefore developed to combat the NBI. The WLM multiuser detector is also based on the weighted M-estimate concept. Numerical results show that the proposed WLM multiuser detector significantly outperforms over the conventional linear decorrelator, the robust decorrelator with M-estimate and the WLS detector under NBI.
Persistent Identifierhttp://hdl.handle.net/10722/198857
ISSN
2015 Impact Factor: 0.508
2015 SCImago Journal Rankings: 0.262
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCheng, H-
dc.contributor.authorChan, SC-
dc.contributor.authorZhang, ZG-
dc.date.accessioned2014-07-11T06:47:48Z-
dc.date.available2014-07-11T06:47:48Z-
dc.date.issued2008-
dc.identifier.citationJournal of Signal Processing Systems, 2008, v. 52 n. 2, p. 165-180-
dc.identifier.issn1939-8018-
dc.identifier.urihttp://hdl.handle.net/10722/198857-
dc.description.abstractIn this paper, we present a robust adaptive channel estimator and a robust multiuser detector for wireless multicarrier code-division multiple access (MC–CDMA) systems under narrowband interference (NBI). The conventional least-squares (LS) channel estimator performs poorly when narrowband interfering signals contaminate the multicarrier systems. A new weighted recursive least M-estimate (WRLM) channel estimator is hence developed to estimate multipath fading channels in the presence of NBI. The new robust channel estimator resorts to M-estimate and weighted least-squares (WLS) techniques. Simulations show that the WRLM channel estimator offers substantial performance gain over conventional recursive least-squares (RLS), recursive least M-estimate (RLM) and weighted RLS (WRLS) channel estimators under NBI. With the estimated channel coefficients, a robust multiuser detector is proposed to jointly suppress multiple access interference (MAI) and NBI. The performance of the linear decorrelator will degrade substantially in the presence of NBI. A weighted least M-estimate (WLM) algorithm is therefore developed to combat the NBI. The WLM multiuser detector is also based on the weighted M-estimate concept. Numerical results show that the proposed WLM multiuser detector significantly outperforms over the conventional linear decorrelator, the robust decorrelator with M-estimate and the WLS detector under NBI.-
dc.languageeng-
dc.publisherSpringer New York LLC. The Journal's web site is located at http://springerlink.metapress.com/content/120889/-
dc.relation.ispartofJournal of Signal Processing Systems-
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectLeast-squares (WLS) techniques-
dc.subjectNarrowband interference (NBI)-
dc.subjectWireless communications-
dc.subjectCode division multiple access-
dc.subjectMultiuser detection-
dc.titleRobust Channel Estimation and Multiuser Detection for MC-CDMA Systems under Narrowband Interferenceen_US
dc.typeArticleen_US
dc.identifier.emailChan, SC: scchan@eee.hku.hk-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s11265-007-0145-7-
dc.identifier.scopuseid_2-s2.0-46549086304-
dc.identifier.hkuros167913-
dc.identifier.volume52-
dc.identifier.issue2-
dc.identifier.spage165-
dc.identifier.epage180-
dc.identifier.isiWOS:000256474600005-
dc.publisher.placeUnited States-

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