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dc.contributor.authorPourgharehkhan, Zahra
dc.contributor.authorTaherpour, Abbas
dc.contributor.authorSala Álvarez, José
dc.contributor.authorKhattab, Tamer
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.identifier.citationPourgharehkhan, Z., Taherpour, A., Sala, J., Khattab, T. Correlated multiple antennas spectrum sensing under calibration uncertainty. "IEEE transactions on wireless communications", 01 Desembre 2015, vol. 14, núm. 12, p. 6777-6791.
dc.description.abstractWe address the problem of spectrum sensing in cognitive radios (CRs) when the secondary user (SU) is equipped with a multiantenna receiver. We consider scenarios with correlation between the received channels at different antennas and unequal per-antenna noise variances to accommodate calibration errors. First, we derive the exact as well as the asymptotic performance of the genie-aided (benchmark) detector with perfect knowledge of the antenna correlation coefficients, the primary user (PU) signal power and the noise covariance matrix. Then, we consider the sensing problem in which the SU is non-cognizant of the per-antenna noise variances, the PU signal power and the correlation of channel gains, starting with a specific treatment of the two-antenna case. For a general multiantenna receiver, we propose combining the derived test statistics among all antenna pairs. The related optimization problem to obtain the optimum combination weights is analyzed, which requires the analytical performance characterization of the constituent two-antenna detector. Thus, we compute the exact performance of the proposed detector in a special case (a particular case of the Hadamard ratio test) in terms of its detection and false alarm probabilities. Performance analyses are verified with simulations, showing that the proposed detector outperforms several recently-proposed multiantenna detectors for CR in the scenarios considered.
dc.format.extent15 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telemàtica i xarxes d'ordinadors
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Antenes i agrupacions d'antenes
dc.subject.lcshWireless LANs
dc.subject.lcshMicrowave antennas
dc.subject.otherCognitive radio
dc.subject.otherSpectrum sensing
dc.subject.otherMultiple antennas
dc.subject.otherAntenna correlations
dc.subject.otherCalibration uncertainty
dc.subject.otherConvex optimization problem
dc.subject.otherCognitive radio networks
dc.subject.otherFading correlation
dc.titleCorrelated multiple antennas spectrum sensing under calibration uncertainty
dc.subject.lemacXarxes locals sense fil Wi-Fi
dc.subject.lemacAntenes de microones
dc.contributor.groupUniversitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
upcommons.citation.authorPourgharehkhan, Z., Taherpour, A., Sala, J., Khattab, T.
upcommons.citation.publicationNameIEEE transactions on wireless communications

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