Low-complexity two-rate based multivariate impulse response reconstructor for time-skew error correction in m-channel time-interleaved ADCs
2013 (English)In: IEEE International Symposium on Circuits and Systems (ISCAS), 2013, IEEE , 2013, 2936-2939 p.Conference paper (Refereed)
Nonuniform sampling occurs in time-interleaved analog-to-digital converters (TI-ADC) due to timing mismatches between the individual channel analog-to-digital converters (ADCs). Such nonuniformly sampled output will degrade the achievable resolution in a TI-ADC. To restore the degraded performance, digital time-varying reconstructors can be used at the output of the TI-ADC, which in principle, converts the nonuniformly sampled output sequence to a uniformly sampled output. As the bandwidth of these reconstructors increases, their complexity also increases rapidly. Also, since the timing errors change occasionally, it is important to have a reconstructor architecture that requires fewer coefficient updates when the value of the timing error changes. Multivariate polynomial impulse response reconstructor is an attractive option for an M-channel reconstructor. If the channel timing error varies within a certain limit, these reconstructors do not need any online redesign of their impulse response coefficients. This paper proposes a technique that can be applied to multivariate polynomial impulse response reconstructors in order to further reduce the number of fixed-coefficient multipliers, and thereby reduce the implementation complexity.
Place, publisher, year, edition, pages
IEEE , 2013. 2936-2939 p.
, IEEE International Symposium on Circuits and Systems, ISSN 0271-4310
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-106537DOI: 10.1109/ISCAS.2013.6572494ISI: 000332006803036ISBN: 978-1-4673-5760-9OAI: oai:DiVA.org:liu-106537DiVA: diva2:716591
IEEE International Symposium on Circuits and Systems (ISCAS), 19-23 May 2013, Beijing, China