On simulations about the precision of non uniform hybrid filter bank analog/digital converters

Abstract : In this paper we present a theoretical study of the errors due to imperfect reconstruction and to quantization in hybrid filter bank (HFB) analog/digital (A/D) converters, that are non uniform i.e., with K channels and an arbitrary ratio M of the M-fold expanders (M ≤ K). We propose then a new method of simulation for such HFB A/D converters that avoids any numerical computation of differential equation solutions. The results of simulation are compared with theoretical ones. Moreover, in HFB A/D converter studies, the effect of quantization noise is generally indicated by its average power at the output of the HFB, when it is M-cyclostationary. This paper shows on an example that the variance of the global error at the HFB output can vary a lot in a period of M samples.
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2006 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006), May 2006, Toulouse, France. 3, pp.237-240, 2006, <10.1109/ICASSP.2006.1660634>
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Dernière modification le : mardi 26 février 2008 - 16:21:21
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Jean-Luc Collette, Michel Barret. On simulations about the precision of non uniform hybrid filter bank analog/digital converters. 2006 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006), May 2006, Toulouse, France. 3, pp.237-240, 2006, <10.1109/ICASSP.2006.1660634>. <hal-00244006>

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