Processing Finite-length Signals with Mdft Filter Banks

نویسندگان

  • Tanja KARP
  • Alfred MERTINS
  • Norbert J. FLIEGE
چکیده

WITH MDFT FILTER BANKS Tanja KARP, Alfred MERTINS and Norbert J. FLIEGE Hamburg University of Technology, Telecommunications Institute, Eissendorfer Str. 40, 21071 Hamburg, Germany, E-mail: [email protected] R ESUM E Plusieurs publications r ecentes pr esentent des m ethodes qui permettent d'obtenir des bancs de ltres a reconstruction parfaite pr eservant le support temporel de signaux d'entr ee de longueur nie. Ces m ethodes utilisent une extension temporelle de ces signaux [1, 2], et un design de ltres de transition pour les bords [3, 4, 5]. Elles ne peuvent cependant pas être appliqu ees directement aux bancs de ltres modul es et a phase lin eaires dont les centres de sym etrie des ltres d'analyse sont di erents [6, 7, 8, 9]. N eanmoins, en prolongeant le signal d'entr ee de mani ere appropri ee, on peut retrouver les propri et es de reconstruction parfaite et de pr eservation du support temporel ni avec de tels bancs de ltres. Dans cet article, nous nous concentrons sur des m ethodes qui utilisent l'extension du support de signaux nis, appliqu ees aux bancs de ltres MDFT (ceux-ci peuvent être consid er es comme un cas g en eral pour la classe des bancs de ltres etudi es). Les r esultats ainsi obtenus peuvent être directement utilis es dans les bancs de ltres propos es par Princen et Bradley [6] et par Lin et Vaidyanathan [9].

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تاریخ انتشار 1995