A fully digital background calibration of timing skew in undersampling TI-ADC

Author

Han Le Duc ; Jabbour, Chadi ; Desgreys, Patricia ; Jamin, Olivier ; Van Tam Nguyen

Author_Institution

Inst. Mines, Telecom Telecom ParisTech, Paris, France

fYear

2014

fDate

22-25 June 2014

Firstpage

53

Lastpage

56

Abstract

This paper proposes a fully digital calibration of timing mismatch for undersampling Time Interleaved Analog-to-Digital Converter (TI-ADC) employed in Software Defined Radio (SDR) receivers. The proposed calibration scheme employs an ideal differentiator filter, a Hilbert transform filter and a scaling factor to compute the derivative of the input in any Nyquist Band (NB). The efficiency of the proposed technique is shown using a four-channel undersampling 60 dB SNR TI-ADC clocked at 2.7 GHz. Monte Carlo simulations show SNDR and SFDR improvements of respectively, 18 dB and 21 dB over the first three NBs.

Keywords

Hilbert transforms; Monte Carlo methods; analogue-digital conversion; radio receivers; software radio; Hilbert transform filter; Monte Carlo simulation; NB; Nyquist band; SDR receivers; SFDR improvement; SNDR improvement; four-channel undersampling; frequency 2.7 GHz; fully-digital background calibration; ideal differentiator filter; scaling factor; software defined radio receivers; timing mismatch; timing skew; undersampling TI-ADC; undersampling time-interleaved analog-to-digital converter; Baseband; Calibration; Gain; Modulation; Niobium; Timing; Transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

New Circuits and Systems Conference (NEWCAS), 2014 IEEE 12th International

Conference_Location

Trois-Rivieres, QC

Type

conf

DOI

10.1109/NEWCAS.2014.6933983

Filename

6933983