Title:
適応等化装置、及び適応等化方法
Document Type and Number:
Japanese Patent JP4109173
Kind Code:
B2
Abstract:
An adaptive equalization apparatus comprises an equalizer for equalizing a playback signal read from a recording medium, using tap coefficients; a maximum likelihood decoder for subjecting an equalized signal outputted from the equalizer to maximum likelihood decoding; a first delay unit for delay-adjusting the playback signal to make the signal coincide with the timing of a tentative decoded signal that is obtained in the process of maximum likelihood decoding; a second delay unit for delay-adjusting the equalized signal to make the signal coincide with the timing of the tentative decoded signal; and a coefficient adaptive controller for adaptively controlling the tap coefficients so that an error in the maximum likelihood decoding is minimized, on the basis of the tentative decoded signal, an output of the first delay unit, and an output of the second delay unit.
Inventors:
Akira Yamamoto
Harushun Miyashita
Harushun Miyashita
Application Number:
JP2003316863A
Publication Date:
July 02, 2008
Filing Date:
September 09, 2003
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G11B20/10; G11B5/035; G11B5/09; H03H21/00
Domestic Patent References:
| JP9097476A | ||||
| JP5128729A | ||||
| JP2003085764A | ||||
| JP2003059187A |
Attorney, Agent or Firm:
Kenichi Hayase