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Structure of Delayless Subband Adaptive Filter Using Hadamard Transformation
Kiyoshi NISHIKAWA Takuya YAMAUCHI Hitoshi KIYA
Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Vol.E81-A
No.6
pp.1013-1020 Publication Date: 1998/06/25 Online ISSN:
DOI: Print ISSN: 0916-8508 Type of Manuscript: Special Section PAPER (Special Section of Papers Selected from ITC-CSCC'97) Category: Digital Signal Processing Keyword: adaptive digital filter, delayless, Hadamard transform,
Full Text: PDF(637.8KB)>>
Summary:
In this paper, we consider the selection of analysis filters used in the delayless subband adaptive digital filter (SBADF) and propose to use simple analysis filters to reduce the computational complexity. The coefficients of filters are determined using the components of the first order Hadamard matrix. Because coefficients of Hadamard matrix are either 1 or -1, we can analyze signals without multiplication. Moreover, the conditions for convergence of the proposed method is considered. It is shown by computer simulations that the proposed method can converge to the Wiener filter.
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