Adaptive Background Estimation for Static Nonlinearity Mismatches in Two-Channel TIADCs
2015 (English)In: IEEE Transactions on Circuits and Systems - II - Express Briefs, ISSN 1549-7747, Vol. 62, no 3, 226-230 p.Article in journal (Refereed) Published
Due to channel mismatches in time-interleaved analog-to-digital converters (TIADCs), estimation and compensation methods are required to restore the resolution of the individual converters. Whereas several methods exist for linear mismatches, nonlinearity mismatches have not been widely investigated. This brief presents an adaptive background estimation method for nonlinearity mismatches in two-channel TIADCs. It utilizes a normalized least-mean-square algorithm and assumes slight oversampling as well as a polynomial nonlinearity model that is appropriate when smooth errors dominate. Furthermore, two implementation strategies are proposed to enhance its ability for different applications. The estimation performance of the proposed method is evaluated through behavioral-level simulations.
Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2015. Vol. 62, no 3, 226-230 p.
Adaptive; analog-to-digital converter (ADC); background estimation; nonlinearity mismatches; polynomial models; time interleaving
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:liu:diva-116960DOI: 10.1109/TCSII.2014.2368976ISI: 000350884900003OAI: oai:DiVA.org:liu-116960DiVA: diva2:802050