Title:
等化器およびフィルタ回路切り替え方法
Document Type and Number:
Japanese Patent JP5521725
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve the problem of being incapable of flexibly changing a filter composition according to a requested characteristic since a filter circuit for an equalizer is conventionally fixed.SOLUTION: The equalizer includes: the filter circuit which can implement a plurality of filter shapes by changing over connection for a delay tap; an error calculation circuit for deriving an error between an output value and an expectation value for the output value of the filter circuit; a coefficient calculation circuit for updating a filter coefficient for the filter circuit by a prescribed algorithm in the direction reducing the error and setting to the filter circuit; and a control circuit for specifying the filter shape in order from a plurality of filter shapes, acquiring the error when the error calculation circuit is converged and the filter coefficient when converged for every filter shape, selecting the filter shape corresponding to a relatively small error when compared to a plurality of errors acquired for every filter shape, as well as setting the filter coefficient for the converged time corresponding to the selected filter shape to the filter circuit.
Inventors:
Masaya Kibune
Application Number:
JP2010094296A
Publication Date:
June 18, 2014
Filing Date:
April 15, 2010
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04B3/06; H03H21/00; H04L25/03; H04L27/01
Domestic Patent References:
| JP9326728A | ||||
| JP5075393A | ||||
| JP3085026A | ||||
| JP1258511A | ||||
| JP2007274022A |
Attorney, Agent or Firm:
Furuya Fumio
Toshihide Mori
Toshihide Mori