Adaptive compensation of frequency response mismatches in high-resolution time-interleaved ADCs using a low-resolution ADC and a time-varying filter

Author

Saleem, Shahzad ; Vogel, Christian

Author_Institution

Signal Process. & Speech Commun. Lab., Graz Univ. of Technol., Graz, Austria

fYear

2010

fDate

May 30 2010-June 2 2010

Firstpage

561

Lastpage

564

Abstract

This paper investigates the adaptive compensation of frequency response mismatches in an M-channel time-interleaved analog-to-digital converter (TI-ADC) using an extra low-resolution ADC and a time-varying FIR filter. The introduced compensation structure may be used to compensate any linear frequency response mismatches including time skew mismatches. The coefficients of the time-varying filter are adapted using the least-mean square (LMS) algorithm. The performance of the proposed compensation structure is demonstrated through numerical simulations.

Keywords

FIR filters; analogue-digital conversion; frequency response; least mean squares methods; adaptive compensation; extra low-resolution ADC; frequency response mismatches; high resolution time interleaved ADC; least-mean square algorithm; time skew mismatches; time varying filter; time-varying FIR filter; time-varying filter; Adaptive filters; Adaptive signal processing; Bandwidth; Calibration; Finite impulse response filter; Frequency response; Laboratories; Least squares approximation; Oral communication; Time varying systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on

Conference_Location

Paris

Print_ISBN

978-1-4244-5308-5

Electronic_ISBN

978-1-4244-5309-2

Type

conf

DOI

10.1109/ISCAS.2010.5537536

Filename

5537536