MDFT filter banks with perfect reconstruction

T. Karp, N. J. Fliege

Research output: Contribution to journalConference articlepeer-review

23 Scopus citations


In [1, 2], the Modified DFT (MDFT) polyphase filter bank has been introduced. It has been shown that this filter bank is able to cancel adjacent channel alias spectra resulting in almost perfect reconstruction. Compared to cosine modulated filter banks, the MDFT filter bank offers advantages such as linear phase analysis and synthesis filters, complex valued signal processing with a different mapping into the subbands and low propagation delays. In this paper, it is shown that the MDFT filter bank structure provides a cancellation of all odd alias spectra. Furthermore, it is demonstrated that even perfect reconstruction can be obtained by an appropriate filter design.

Original languageEnglish
Pages (from-to)744-747
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - 1995
EventProceedings of the 1995 IEEE International Symposium on Circuits and Systems-ISCAS 95. Part 3 (of 3) - Seattle, WA, USA
Duration: Apr 30 1995May 3 1995


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