A polyphase approach to time-varying filter banks.
Journal
1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings, ICASSP '96, Atlanta, Georgia, USA, May 7-10, 1996
Pages
1554-1557
Date Issued
1996
Author(s)
Abstract
We introduce a polyphase representation for linear time-varying (LTV) filters. Using the proposed polyphase approach, we are able to show some unusual properties of LTV filter bank (FB) that have not been pointed out before. The problem of interchangeability of analysis and synthesis banks is considered. Lossless TVFBs is studied in detail. Perfect reconstruction (PR) can always be obtained for lossless TVFBs. However, in general a PR lossless TVFB will only generate a tight frame.
Type
conference paper