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SYSTEMES DE NUMERISATION HAUTES PERFORMANCES
- Etude des solutions à bancs de filtres hybrides -
- Caractérisation et optimisation -

Abstract : This PhD thesis deals with a technique allowing to increase the speed of Analog to Digital Converters (ADC). Parallel structures together with Hybrid Filter Banks (HFB) were designed. Synthesis methods of HFB that take into account analog filters implementation constraints were conceived. Some optimization methods of the synthesis procedures were also proposed. The effect of the quantization noise of a branch quantizer on the HFB output was studied through theoretical estimations strengthened by simulations. The effect of finite word implementation of synthesis filters coefficients was also studied. A theoretical estimation of the noise introduced by coefficient quantization was given. Simulations confirming this theoretical estimation were performed. The hybrid nature of HFB generates analog implementation problems. One of the most important challenges in designing HFB was identified: the dramatic performance degradation in the presence of small analog filters implementation errors. Consequently, readjustment of synthesis filters coefficients after physical implementation of the analysis bank appears as mandatory and a calibration method was also proposed.
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https://tel.archives-ouvertes.fr/tel-00274217
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Submitted on : Thursday, April 17, 2008 - 3:26:27 PM
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Tudor Petrescu. SYSTEMES DE NUMERISATION HAUTES PERFORMANCES
- Etude des solutions à bancs de filtres hybrides -
- Caractérisation et optimisation -. Traitement du signal et de l'image [eess.SP]. Université Paris Sud - Paris XI, 2006. Français. ⟨tel-00274217⟩

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