Title :
On the Subband Orthogonality of Cosine-Modulated Filter Banks
Author :
Lee, Kong A. ; Gan, Woon S.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ.
Abstract :
In this brief, the second-order characteristics of cosine-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
Keywords :
channel bank filters; filtering theory; signal processing; computational complexity; cosine-modulated filter banks; orthogonal property; subband orthogonality; subband processing system; zero lag; Band pass filters; Channel bank filters; Digital signal processing; Equations; Filter bank; Filtering theory; Finite impulse response filter; Gallium nitride; Laboratories; Prototypes; Cosine-modulated filter banks; orthogonal; subband processing;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.876383
