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김명기,임영도 동아대학교 공과대학 부설 한국자원개발연구소 1986 硏究報告 Vol.10 No.1
A method on the hardware implementation of the Finite Impulse Response (FIR) digital filter using Digital Quarter Square Multiphcation (DQSM) algorithm is proposed. ROM requirement can be reduced by using the double precision algorithm and the absolute value circuit, and also execution speed can be improved by reducing logic level steps of absolute value circuit. The frequency response of FIR digital filter implemented by the above method is quite agreeable with the frequency response simulated by Remez exchange algorithm. If coefficients should be stored in the RAM instead of the ROM, this method is especially useful in the case of FIR digital filter with time varying coefficients.