Efficient signal reconstruction scheme for time-interleaved ADCs
2012 (English)In: Proc. IEEE 10th Int. New Circuits and Systems Conf. (NEWCAS), IEEE , 2012, 357-360 p.Conference paper (Refereed)
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.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-87582DOI: 10.1109/NEWCAS.2012.6329030ISI: 000310372500090ISBN: 978-1-4673-0859-5ISBN: 978-1-4673-0857-1ISBN: e-978-1-4673-0858-8OAI: oai:DiVA.org:liu-87582DiVA: diva2:589546
10th International New Circuits and Systems Conference (NEWCAS 2012), 17-20 June 2012, Montreal, Canada