Title:
CYCLIC TYPE DIGITAL FILTER OF ADAPTABILITY
Document Type and Number:
Japanese Patent JPH04223611
Kind Code:
A
Abstract:
PURPOSE: To provide an adaptive cyclic type digital filter provided with high stability and differentiation related to only the denominator or numerator of the transmission function of a transmission filter respectively. CONSTITUTION: The transmission filter H provided with a cyclic type partial filter HR is provided and transmission characteristics described by the transmission function can be set by filter coefficients a1 -an and b0 -bn . A control block CC for setting the filter coefficients a1 -an and b0 -bn of the transmission filter H relating to control signals da1 -dam and db0 -db7 is provided and a gradient filter G connected to the output side of the transmission filter H is provided. In the gradient filter G, the output signals (y) of the transmission filter are led out through a partial filter provided with the transmission function corresponding to the differentiation of the transmission function of the transmission filter H corresponding to the respective filter coefficients a1 -an and b0 -bn and use is performed as the control signals dia -dam and db0 -dbk to the control block CC.
Inventors:
RAYOSU GATSUSHI
Application Number:
JP8325191A
Publication Date:
August 13, 1992
Filing Date:
March 22, 1991
Export Citation:
Assignee:
SIEMENS AG
International Classes:
H03H17/00; H03H21/00; H04B3/23; (IPC1-7): H03H17/04; H03H21/00
Attorney, Agent or Firm:
Iwao Yamaguchi