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Article: Impact of LPF mismatch on I/Q Imbalance in direct conversion receivers

TitleImpact of LPF mismatch on I/Q Imbalance in direct conversion receivers
Authors
KeywordsDirect Conversion Receiver
Elliptic Lpf
Frequency Selective I/Q Imbalance
Rc Mismatch
Tolerance
Issue Date2011
Citation
Ieee Transactions On Wireless Communications, 2011, v. 10 n. 6, p. 1702-1708 How to Cite?
AbstractLow-pass-filter (LPF) mismatch is a main source of frequency-selective (FS) I/Q imbalance in direct-conversion receivers. Using a first-order Taylor expansion approximation, the relationship between the non-ideal resistors and capacitors (RCs) in the circuit and the LPF mismatch is analyzed. Close-form expressions are derived for the expectation of LPF mismatch and front end image-leakage-ratio (ILR), and further verified by simulations. It is shown that for RC matching inaccuracies and tolerances less than 5%, the LPF mismatch is dominated by the matching inaccuracy, while the influence of tolerances is negligible. FS I/Q imbalance caused by LPF mismatch varies significantly across the transmission bandwidth, which is extremely serious near the cutoff frequency. Therefore, compensation for FS I/Q imbalance is always recommended, especially near the cutoff frequency. © 2011 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/155624
ISSN
2015 Impact Factor: 2.925
2015 SCImago Journal Rankings: 2.340
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, Yen_US
dc.contributor.authorPan, Zen_US
dc.date.accessioned2012-08-08T08:34:25Z-
dc.date.available2012-08-08T08:34:25Z-
dc.date.issued2011en_US
dc.identifier.citationIeee Transactions On Wireless Communications, 2011, v. 10 n. 6, p. 1702-1708en_US
dc.identifier.issn1536-1276en_US
dc.identifier.urihttp://hdl.handle.net/10722/155624-
dc.description.abstractLow-pass-filter (LPF) mismatch is a main source of frequency-selective (FS) I/Q imbalance in direct-conversion receivers. Using a first-order Taylor expansion approximation, the relationship between the non-ideal resistors and capacitors (RCs) in the circuit and the LPF mismatch is analyzed. Close-form expressions are derived for the expectation of LPF mismatch and front end image-leakage-ratio (ILR), and further verified by simulations. It is shown that for RC matching inaccuracies and tolerances less than 5%, the LPF mismatch is dominated by the matching inaccuracy, while the influence of tolerances is negligible. FS I/Q imbalance caused by LPF mismatch varies significantly across the transmission bandwidth, which is extremely serious near the cutoff frequency. Therefore, compensation for FS I/Q imbalance is always recommended, especially near the cutoff frequency. © 2011 IEEE.en_US
dc.languageengen_US
dc.relation.ispartofIEEE Transactions on Wireless Communicationsen_US
dc.subjectDirect Conversion Receiveren_US
dc.subjectElliptic Lpfen_US
dc.subjectFrequency Selective I/Q Imbalanceen_US
dc.subjectRc Mismatchen_US
dc.subjectToleranceen_US
dc.titleImpact of LPF mismatch on I/Q Imbalance in direct conversion receiversen_US
dc.typeArticleen_US
dc.identifier.emailZhou, Y:yqzhou@eee.hku.hken_US
dc.identifier.authorityZhou, Y=rp00214en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1109/TWC.2011.040411.101319en_US
dc.identifier.scopuseid_2-s2.0-79959552150en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79959552150&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume10en_US
dc.identifier.issue6en_US
dc.identifier.spage1702en_US
dc.identifier.epage1708en_US
dc.identifier.isiWOS:000291887900005-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridZhou, Y=7405367062en_US
dc.identifier.scopusauthoridPan, Z=7402644862en_US

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