Abstract
In this brief, the second-order characteristics of co-sine-modulated filter banks are formulated and analyzed. We show that, for any type of input spectrum, adjacent subband signals of a cosine-modulated filter bank are properly phase-aligned in such a way that they are nearly orthogonal at zero lag even though they are not mutually exclusive. The orthogonal properties are desirable in reducing the computational complexity of subband processing systems.
Original language | English |
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Pages (from-to) | 677-681 |
Number of pages | 5 |
Journal | IEEE Transactions on Circuits and Systems II: Express Briefs |
Volume | 53 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 2006 |
Externally published | Yes |
Keywords
- Cosine-modulated filter banks
- orthogonal
- subband processing
ASJC Scopus subject areas
- Electrical and Electronic Engineering