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A Low-Complexity Complementary Pair Affine Projection Adaptive Filter
Kwang-Hoon KIM Young-Seok CHOI Seong-Eun KIM Woo-Jin SONG
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/10/01
Online ISSN: 1745-1337
Type of Manuscript: LETTER
Category: Digital Signal Processing
adaptive filter, complementary pair, intermittent update, affine projection (AP), update interval,
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We present a low-complexity complementary pair affine projection (CP-AP) adaptive filter which employs the intermittent update of the filter coefficients. To achieve both a fast convergence rate and a small residual error, we use a scheme combining fast and slow AP filters, while significantly reducing the computational complexity. By employing an evolutionary method which automatically determines the update intervals, the update frequencies of the two constituent filters are significantly decreased. Experimental results show that the proposed CP-AP adaptive filter has an advantage over conventional adaptive filters with a parallel structure in that it has a similar convergence performance with a substantial reduction in the total number of updates.