| 摘要 |
The computational method for the realization of digital recursive filter comprises a step of computing an output signal y(n) of sample n on the basis of an algebraic sum of input and output values of sampled signals at given instant and former instants, affecting the filter coefficients, which is coupled to two other computational steps wherein one takes up the remainder of integer divisions by a chosen scale factor, obtained by the computation of output signals of former samples, and the other replaces the rounding to whole value by default obtained by the division of output signal by the scale factor by the rounding to whole value nearer to the real number quotient. The computational method comprises the first step typical of classical recursive filter, which is coupled to one of the two additional steps. The utilization of computational meethod is for the realization of a digital recursive filter, a system for active acoustic protection, and a control system with a feedback loop. The computational method is presented schematically in the form of a block diagram, whr x(n) is input signal, y(n) is output signal, and r(n) is remainder signal. |
