Naslov
On an iterative method to design oversampled GDFT filterbanks

Autori
Dumitrescu, Bogdan ; Bregović, Robert ; Saramäki, Tapio

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 2005 International TICSP Workshop on Spectral Methods and Multirate Signal Processing, SMMSP 2005 / Astola, Jaako ; Egiazarian, Karen ; Saramäki, Tapio - Tampere : Tampere International Center for Signal Processing, 2005, 1-6

Skup
2005 International TICSP Workshop on Spectral Methods and Multirate Signal Processing

Mjesto i datum
Riga, Latvija, 20.06.2005. - 22.06.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Filterbanks; GDFT; Semi-definite programing

Sažetak
We have recently proposed an algorithm for the simplified design of generalized DFT modulated filterbanks. The algorithm produces very good designs, but its execution time becomes unacceptably long for prototype filters lengths greater than 200. The main cause is the initialization step, in which an orthogonal filterbank is found. In the present paper, we study two alternative initialization methods. The most successful is based on the design of a reduced length filterbank from which, by interpolation, a good initialization of nominal length can be found. Examples illustrate the quality and eficiency of this approach.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA