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Approximate processing for low-power digital filtering using variable canonic signed digit coefficients

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4 Author(s)
Young-Woo Kim ; Sch. of Electr. Eng., Korea Univ., Seoul, South Korea ; Young-Mo Yang ; Jae-Tack Yoo ; Soo-Won Kim

An alternative approximate processing method which dynamically adjusts the precision of the canonic signed digit (CSD) coefficients is proposed. This proposed method employs a two-stage search for finding approximated values of CSD coefficients. Experimental results show that the number of additions is reduced to 29.4%, 11.8%, and 3.9% for each approximation level

Published in:

Electronics Letters  (Volume:36 ,  Issue: 1 )