Sensitivity of Time-Division Multiplexing Parallel A/D Converters to Analog Imperfection

In this paper, the Time-Division Multiplexing (TDM) architecture for the Hybrid Filter Bank (HFB) A/D Converters (ADCs) is studied in the time domain. Giving a brief survey on the TDM structure, the classical and TDM HFB-based ADCs are compared in terms of the output resolution for some input signals. To study the sensitivity to the realization errors, both structures are simulated assuming the same realization errors in the analysis filter banks. The TDM HFB-based ADC exhibits a better performance either in the presence or in the absence of realization errors than the classical one. Besides, the input-output relationship is demonstrated to be Linear Time-Invariant (LTI) for the TDM HFB, but it is non-LTI in the the classical HFB case. Thus, it is possible only in the TDM case that a blind deconvolution method is employed for adaptively compensating the realization errors.

[1]  Masaaki Ikehara,et al.  Digital compensation scheme for coefficient errors of complex filter bank parallel A/D converter in low-IF receivers , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[2]  Mariane R. Petraglia,et al.  Improving the near-perfect hybrid filter bank performance in the presence of realization errors , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[3]  Lars Wanhammar,et al.  Two-channel digital and hybrid analog/digital multirate filter banks with very low-complexity analysis or synthesis filters , 2003, IEEE Trans. Circuits Syst. II Express Briefs.

[4]  D. Asemani,et al.  Time-Division Multiplexing architecture for Hybrid Filter Bank A/D converters , 2007, 2007 50th Midwest Symposium on Circuits and Systems.

[5]  Gabor C. Temes,et al.  Understanding Delta-Sigma Data Converters , 2004 .

[6]  Truong Q. Nguyen,et al.  Design of hybrid filter banks for analog/digital conversion , 1998, IEEE Trans. Signal Process..

[7]  Walter H. W. Tuttlebee.  Software radio technology: a European perspective , 1999, IEEE Commun. Mag..

[8]  D. Asemani,et al.  Influences of oversampling and analog imperfections on Hybrid Filter Bank A/D converters , 2006, 2006 49th IEEE International Midwest Symposium on Circuits and Systems.

[9]  Sanjit K. Mitra,et al.  Multirate analog-digital systems for signal processing and conversion , 1997 .