System and circuit approaches for the design of multi-mode sigma-delta modulators with application for multi-standard wireless receivers [Elektronische Ressource] / Juan Jesus Ocampo Hidalgo

Description

System and Circuit Approaches for the Design of Multi modeSigma Delta Modulators with Application for Multi standardWireless ReceiversDem Fachbereich 18 derTechnischen Universität Darmstadtzur Erlangung der Würde einesDoktor–Ingenieurs (Dr. Ing.)genehmigte DissertationM.Sc. E.E.Juan Jesus Ocampo Hidalgogeboren am 19. November 1970Referent: Prof. Dr. Dr. h. c. mult. Manfred GlesnerKorreferent: Prof. Dr. Dr. h. c. Franco MalobertiTag der Einreichung: 02. November 2004Tag der mündlichen Prüfung: 21. Dezember 2004D17Darmstädter DissertationenAbstractThis thesis is mainly concerned with discrete time sigma delta modulators aimed for the digiti sation of narrow and wide band signals present in multi standard wireless receivers. For thispurpose, a receiver architecture is proposed, where the analogue to digital conversion of narrowband signals is carried out at low values of intermediate frequency, while wide band signals arebeing converted at zero IF.In order to preserve the low power consumption requirements demanded by mobile terminals,an A/D converter able to reach high values of signal to noise ratio by using modest oversam pling ratios is needed. Another characteristic, that should be exhibited by the converter is flex ibility, since it has to work in a multi mode environment handling with different intermediatefrequencies, channel bandwidths and modulation techniques.

Informations

• Publié par: technischen_universitat_darmstadt
• Publié le: 01 janvier 2005
• Nombre de lectures: 15
• Langue: English
• Poids de l'ouvrage: 2 Mo

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