论文信息 - On the Subband Orthogonality of Cosine-Modulated Filter Banks

On the Subband Orthogonality of Cosine-Modulated Filter Banks

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

Kong-Aik Lee | Woon-Seng Gan

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