| 摘要 |
A determination method for infinite impulse response (HR)-digital filter recursion coefficients according to which a IIR filter signal response target amplitude-frequency characteristic is preset, an iteration counter value equal to 1is established and passing to the first step whereon gradient of errors in a frequency domain for each of feedforward gains are determined, the first step for each of feedforward gains is repeated, in the second stage of gradient of errors in a frequency domain for each of feedforward gains are determined, the second step for each of feedforward gains is repeated, in the third stage a modification of feedforward and feedback gains is performed, when actual value of counter iteration number is less than maximum iteration number value, a counter iteration value is increased to 1 and passing to the first step. A feedforward and feedback gain modification in the third stage is performed:in case of low-frequency filters for feedforward gains by formula,and for feedback gains by formula,and in case of high-frequency filters for feedforward gains by formula,and for feedback gains by formula,whenaccording to which infinite impulse response (HR)-digital filter recursion coefficient values are determined. |
