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Efficient signal reconstruction scheme for time-interleaved ADCs
Linköping University, Department of Electrical Engineering, Electronics System. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Electronics System. Linköping University, The Institute of Technology.
2012 (English)In: Proc. IEEE 10th Int. New Circuits and Systems Conf. (NEWCAS), IEEE , 2012, 357-360 p.Conference paper, Published paper (Refereed)
Abstract [en]

Time-interleaved analog-to-digital converters (ADCs) exhibit offset, gain, and time-skew errors due to channel mismatches. The time skews give rise to a nonuniformly sampled signal instead of the desired uniformly sampled signal. This introduces the need for a digital signal reconstructor that takes the "nonuniform samples" and generates the "uniform samples". In the general case, the time skews are frequency dependent, in which case a generalization of nonuniform sampling applies. When the bandwidth of a digital reconstructor approaches the whole Nyquist band, the computational complexity may become prohibitive. This paper introduces a new scheme with reduced complexity. The idea stems from recent multirate-based efficient realizations of linear and time-invariant systems. However, a time-interleaved ADC (without correction) is a time-varying system which means that these multirate-based techniques cannot be used straightforwardly but need to be appropriately analyzed and extended for this context.

Place, publisher, year, edition, pages
IEEE , 2012. 357-360 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-87582DOI: 10.1109/NEWCAS.2012.6329030ISI: 000310372500090ISBN: 978-1-4673-0859-5 (print)ISBN: 978-1-4673-0857-1 (print)ISBN: e-978-1-4673-0858-8 OAI: oai:DiVA.org:liu-87582DiVA: diva2:589546
Conference
10th International New Circuits and Systems Conference (NEWCAS 2012), 17-20 June 2012, Montreal, Canada
Available from: 2013-01-18 Created: 2013-01-18 Last updated: 2014-08-22Bibliographically approved

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