| 摘要 |
PROBLEM TO BE SOLVED: To simplify the construction of a filter for limiting a frequency band, and to enable digital signal processing at a low speed. SOLUTION: Input data S0 is delayed for every one sample by a sample delay device 1-1 and 163 samples S0-S162 are generated. Of the 163 samples, the samples S0, S2 and S4-S162 selected from every one sample whose coefficient is not zero (a center sample S81 included) are multiplied by coefficients Coef0, Coef2, respectively, and Coef4-Coef162 (a center coefficient Coef81 included). Subsequently, the results obtained by multiplication are added by an adder 1-3.
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