ADC post-compensation using a Hammerstein model

Author

Schmidt, C. ; Cousseau, J.E. ; Figueroa, J.L. ; Wichman, R. ; Werner, S.

Author_Institution

Inst. de Investig. en Ing. Electr. Alfredo Desages, UNS CONICET, Bahia Blanca, Argentina

fYear

2009

fDate

1-2 Oct. 2009

Firstpage

71

Lastpage

76

Abstract

In this work, a scheme for the calibration of an ADC model is presented, as well as the process of identification of the compensation block. The model proposed for this compensation block is a Hammerstein box model whose parameters are estimated in a non iterative fashion. A Hammerstein model is composed of a static nonlinearity followed by a linear time invariant (LTI) filter. This model is then to be added at the output of the ADC to obtain the corrected value of the ADC output word. A performance analysis is carried out in terms of the mean squared error (MSE) to determine both the length of the linear part of the Hammerstein model and the order needed for the polynomial nonlinearity used. Also, the bit error rate (BER) is calculated before and after compensation to measure the improvement achieved.

Keywords

analogue-digital conversion; error statistics; filtering theory; mean square error methods; ADC post-compensation; Hammerstein model; bit error rate; linear time invariant filter; mean squared error; polynomial nonlinearity; static nonlinearity;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro-Nanoelectronics, Technology and Applications, 2009. EAMTA 2009. Argentine School of

Conference_Location

San Carlos de Bariloche

Print_ISBN

978-1-4244-4835-7

Electronic_ISBN

978-9-8725-1029-9

Type

conf

Filename

5288896