Title:
【発明の名称】再帰フィルタ設計方式
Document Type and Number:
Japanese Patent JP3101377
Kind Code:
B2
Abstract:
PURPOSE:To calculate an optimum resolution in a snort time and to prevent a recursive filter from being made instable by calculating an evaluating value with the coefficient of a range, where an output is stablized, as a parameter. CONSTITUTION:An arithmetic processing means is provided with an impulse response setting means 3, evaluating value calculating means 2, evaluating value comparing means 4, coefficient (b) parameter updating means 5 and coefficient (a) calculating means 6. Then, the evaluating values are calculated concerning an impulse response and respective b(t) while successively updating the b(t) in the area where an output p(t) is stablized. Next, the respective evaluating values are compared with an evaluation reference value and when any evaluating value smaller than the evaluation reference value can be obtained, the evaluation reference value is updated by that evaluating value so as to calculate the b(t) having the minimum evaluating value concerning all the b(t) in the area where the output p(t) is stablized. Then, an a(t) is calculated by the b(t) and the coefficients b(t) and a(t) are outputted as the optimum coefficients of the recursive filter.
Inventors:
Takashi Toriu
Shigeru Sasaki
Shigeru Sasaki
Application Number:
JP33018491A
Publication Date:
October 23, 2000
Filing Date:
December 13, 1991
Export Citation:
Assignee:
富士通株式会社
International Classes:
G06F17/50; G06F17/10; (IPC1-7): G06F17/50
Domestic Patent References:
| JP4158479A | ||||
| JP3502634A |
Attorney, Agent or Firm:
Kuniaki Fukui (3 outside)