Unit-norm tight frames (UNTFs) are interesting in the context of robust transmission because of their robustness to erasures. In this correspondence, we show how to convert any finite-dimensional UNTF into an oversampled filter bank which implements a UNTF. The proposed construction uses the vectors of the finite-dimensional frame as modulating functions of a modulated filter bank. Like the usual critically sampled modulated filter banks, the oversampled filter banks obtained by the proposed construction can be made time variant without losing the UNTF condition.
Time-Variant Unit Norm Tight Frames by Means of Modulated Filter Banks
BERNARDINI, Riccardo
2007-01-01
Abstract
Unit-norm tight frames (UNTFs) are interesting in the context of robust transmission because of their robustness to erasures. In this correspondence, we show how to convert any finite-dimensional UNTF into an oversampled filter bank which implements a UNTF. The proposed construction uses the vectors of the finite-dimensional frame as modulating functions of a modulated filter bank. Like the usual critically sampled modulated filter banks, the oversampled filter banks obtained by the proposed construction can be made time variant without losing the UNTF condition.File in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
04276956.pdf
non disponibili
Tipologia:
Altro materiale allegato
Licenza:
Non pubblico
Dimensione
778.05 kB
Formato
Adobe PDF
|
778.05 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.