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dc.contributor.authorLai, Wei-Chien_US
dc.contributor.authorJuan, Ta-Yangen_US
dc.contributor.authorHsu, Terng-Yinen_US
dc.contributor.authorChiou, Sheng-Lunen_US
dc.date.accessioned2014-12-08T15:06:41Z-
dc.date.available2014-12-08T15:06:41Z-
dc.date.issued2010-07-01en_US
dc.identifier.issn1939-8018en_US
dc.identifier.urihttp://dx.doi.org/10.1007/s11265-009-0403-yen_US
dc.identifier.urihttp://hdl.handle.net/11536/5233-
dc.description.abstractThe effects of variation in RF, such as I/Q imbalance and filter mismatch, are extremely important for OFDM wireless accesses. This work presents a low-computational estimation of I/Q imbalances with filter mismatches to improve performance in MIMO-OFDM receivers. For N x N MIMO-OFDM systems, the proposed cross-validation estimation is such that, only N + 1 preambles are required to extract the mismatches of filters, gains and phases. With the estimated parameters, frequency-domain filters are exploited to correct frequency-dependent I/Q imbalances. Through performance evaluation of a 2 x 2 MIMO-OFDM system, with ideal channel estimations this study incurs a SNR loss of 1-1.2 dB to maintain a 10% PER at 1-dB gain error, 10A degrees-phase error and the worst 180A degrees-filter mismatch. In addition, this algorithm is well-matched to IEEE 802.11n and new specifications discussed in IEEE 802.11 VHT study group.en_US
dc.language.isoen_USen_US
dc.subjectFilter mismatchen_US
dc.subjectI/Q imbalanceen_US
dc.subjectCross validationen_US
dc.subjectFrequency-Dependent Imbalance (FDI)en_US
dc.subjectMIMO-OFDMen_US
dc.titleCross-Validation Estimation for Frequency-Dependent I/Q Imbalance in MIMO-OFDM Receiversen_US
dc.typeArticleen_US
dc.identifier.doi10.1007/s11265-009-0403-yen_US
dc.identifier.journalJOURNAL OF SIGNAL PROCESSING SYSTEMS FOR SIGNAL IMAGE AND VIDEO TECHNOLOGYen_US
dc.citation.volume60en_US
dc.citation.issue1en_US
dc.citation.spage59en_US
dc.citation.epage70en_US
dc.contributor.department資訊工程學系zh_TW
dc.contributor.departmentDepartment of Computer Scienceen_US
dc.identifier.wosnumberWOS:000276722700005-
dc.citation.woscount2-
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