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Article: Robust Channel Estimation and Multiuser Detection for MC-CDMA Systems under Narrowband Interference
Title | Robust Channel Estimation and Multiuser Detection for MC-CDMA Systems under Narrowband Interference |
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Authors | |
Keywords | Least-squares (WLS) techniques Narrowband interference (NBI) Wireless communications Code division multiple access Multiuser detection |
Issue Date | 2008 |
Publisher | Springer 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? |
Abstract | In 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 Identifier | http://hdl.handle.net/10722/198857 |
ISSN | 2023 Impact Factor: 1.6 2023 SCImago Journal Rankings: 0.479 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Cheng, H | - |
dc.contributor.author | Chan, SC | - |
dc.contributor.author | Zhang, ZG | - |
dc.date.accessioned | 2014-07-11T06:47:48Z | - |
dc.date.available | 2014-07-11T06:47:48Z | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Journal of Signal Processing Systems, 2008, v. 52 n. 2, p. 165-180 | - |
dc.identifier.issn | 1939-8018 | - |
dc.identifier.uri | http://hdl.handle.net/10722/198857 | - |
dc.description.abstract | In 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.language | eng | - |
dc.publisher | Springer New York LLC. The Journal's web site is located at http://springerlink.metapress.com/content/120889/ | - |
dc.relation.ispartof | Journal of Signal Processing Systems | - |
dc.rights | The original publication is available at www.springerlink.com | - |
dc.subject | Least-squares (WLS) techniques | - |
dc.subject | Narrowband interference (NBI) | - |
dc.subject | Wireless communications | - |
dc.subject | Code division multiple access | - |
dc.subject | Multiuser detection | - |
dc.title | Robust Channel Estimation and Multiuser Detection for MC-CDMA Systems under Narrowband Interference | en_US |
dc.type | Article | en_US |
dc.identifier.email | Chan, SC: scchan@eee.hku.hk | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1007/s11265-007-0145-7 | - |
dc.identifier.scopus | eid_2-s2.0-46549086304 | - |
dc.identifier.hkuros | 167913 | - |
dc.identifier.volume | 52 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | 165 | - |
dc.identifier.epage | 180 | - |
dc.identifier.isi | WOS:000256474600005 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 1939-8115 | - |