Correlation-Based Frequency-Response Mismatch Compensation of Quad-TIADC Using Real Samples

Author

Bonnetat, Antoine ; Hode, Jean-Michel ; Ferre, Guillaume ; Dallet, Dominique

Author_Institution

Thales Airborne Syst., Elancourt, France

Volume

62

Issue

8

fYear

2015

fDate

Aug. 2015

Firstpage

746

Lastpage

750

Abstract

This brief proposes a new digital architecture to compensate for the frequency-response mismatch that is specific to four-channel time-interleaved analog-to-digital converters (quad-TIADCs) using a linear periodic time-varying correction and an adaptive feed-backward design. Estimation of the correction parameters is performed iteratively by solving two linear systems based on correlation values of the real signal from the TIADC output. Problem formulation is well detailed and hardware implementation results demonstrate the efficiency of our method.

Keywords

analogue-digital conversion; correlation methods; frequency response; time-varying networks; adaptive feed-backward design; correction parameters estimation; correlation values; digital architecture; four-channel time-interleaved analog-to-digital converters; frequency-response mismatch; linear periodic time-varying correction; linear systems; quad-TIADC; Circuits and systems; Correlation; Estimation; Frequency modulation; Indexes; Timing; Digital enhancement; Time-interleaved analog-to-digital converters; digital enhancement; real signal correlation; time-interleaved analog-to-digital converters (TIADCs);

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2015.2433472

Filename

7107993