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arXiv 0909.1623cs.ITmath.IT
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基于线性正则变换的双通道仿酉滤波器组

Two channel paraunitary filter banks based on linear canonical transform

Sudarshan Shinde

摘要:

本文提出了一种基于线性正则变换而不是离散傅里叶变换的双通道仿酉滤波器组。这种滤波器组的输入输出关系推导出的多相矩阵和调制矩阵。结果表明,与传统滤波器组一样,基于LCT的仿酉滤波器组只需要设计一个滤波器,其余滤波器都可以由它得到,并且可以利用传统的傅里叶域幂对称滤波器设计方法来设计.

英文摘要:

In this paper a two channel paraunitary filter bank is proposed, which is based on linear canonical transform, instead of discrete Fourier transform. Input-output relation for such a filter bank are derived in terms of polyphase matrices and modulation matrices. It is shown that like conventional filter banks, the LCT based paraunitary filter banks need only one filter to be designed and rest of the filters can be obtained from it. It is also shown that LCT based paraunitary filter banks can be designed by using conventional power-symmetric filter design in Fourier domain.

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