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dc.contributor.authorMestre Pons, Francesc X.
dc.contributor.authorRodríguez Fonollosa, Javier
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.identifier.citationMestre Pons, X.; Rodríguez Fonollosa, J. Spatial filtering for pilot-aided WCDMA systems: a semi-blind subspace approach. IEEE Transactions on signal Processing, 2003, vol. 51, núm.10, p. 2665-2678.
dc.description.abstractThis paper proposes a spatial filtering technique for the reception of pilot-aided multirate multicode direct-sequence code division multiple access (DS/CDMA) systems such as wideband CDMA (WCDMA). These systems introduce a code-multiplexed pilot sequence that can be used for the estimation of the filter weights, but the presence of the traffic signal (transmitted at the same time as the pilot sequence) corrupts that estimation and degrades the performance of the filter significantly. This is caused by the fact that although the traffic and pilot signals are usually designed to be orthogonal, the frequency selectivity of the channel degrades this orthogonality at hte receiving end. Here, we propose a semi-blind technique that eliminates the self-noise caused by the code-multiplexing of the pilot. We derive analytically the asymptotic performance of both the training-only and the semi-blind techniques and compare them with the actual simulated performance. It is shown, both analytically and via simulation, that high gains can be achieved with respect to training-onlybased techniques.
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal
dc.subject.lcshSignal processing
dc.subject.lcshSignal detection
dc.subject.otherPilot-aided WCDMA systems
dc.subject.otherSpatial filtering
dc.subject.otherSemi-blind subspace approach
dc.subject.otherArray signal processing
dc.subject.otherBroadband networks
dc.subject.otherCode division multiple access
dc.subject.otherFiltering theory
dc.subject.otherLand mobile radio
dc.subject.otherRadio networks
dc.subject.otherDirect-sequence code division multiple access
dc.subject.otherSpread spectrum communication
dc.subject.otherTelecommunication traffic
dc.subject.otherMultirate DS/CDMA systems
dc.subject.otherMulticode DS/CDMA systems
dc.subject.otherCode-multiplexed pilot sequence
dc.subject.otherFilter weights estimation
dc.subject.otherPilot sequence
dc.subject.otherPilot signals
dc.subject.otherTraffic signals
dc.subject.otherChannel frequency selectivity
dc.subject.otherSignal-to-noise-plus -interference ratio
dc.subject.otherAsymptotic performance
dc.subject.otherTraining-only techniques
dc.subject.otherSemi-blind techniques
dc.subject.otherSimulated performance
dc.titleSpatial filtering for pilot-aided WCDMA systems: a semi-blind subspace approach
dc.subject.lemacProcessament del senyal
dc.contributor.groupUniversitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access

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