Title:
METHOD AND DEVICE FOR IDENTIFYING SYSTEM BY ADAPTIVE FILTER
Document Type and Number:
Japanese Patent JP3008763
Kind Code:
B2
Abstract:
PURPOSE: To provide a system identification method and device in which an accurate filter coefficient is updated even when noise is included.
CONSTITUTION: This device is constituted of an adaptive filter 101 processing a reference input signal 1 to obtain an output 'signal 5, a subtractor 102 subtracting the output signal 5 from an observing signal 3, a power estimate circuit 103 estimating the power of the reference input signal 1, and a step size decision circuit 104 deciding a step size based on the power of the reference input signal, and the step size decision circuit 104 generates a step size monotonously increased when the power of the reference input signal is a threshold level or below and monotonously decreased when the power of the reference input signal is a threshold level or over.
Inventors:
Akihiro Hirano
Application Number:
JP33410693A
Publication Date:
February 14, 2000
Filing Date:
December 28, 1993
Export Citation:
Assignee:
NEC
International Classes:
H03H15/00; H03H17/00; H03H21/00; H04B3/23; H04M9/08; (IPC1-7): H03H21/00; G05B13/02; H04B3/23
Domestic Patent References:
| JP3188717A | ||||
| JP61116434A | ||||
| JP5304444A | ||||
| JP5226976A | ||||
| JP575391A | ||||
| JP470220A | ||||
| JP4271622A |
Other References:
【文献】国際公開93/741(WO,A1)
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)