Title:
【発明の名称】直接アクセス記憶装置(DASD)用の拡張雑音予測最尤(NPML)データ検出の方法および装置
Document Type and Number:
Japanese Patent JP3483854
Kind Code:
B2
Abstract:
A noise-predictive data detection method and apparatus are provided for enhanced noise-predictive maximum-likelihood (NPML) data detection in a direct access storage device. A data signal from a data channel in the direct access storage device is applied to a maximum-likelihood detector that provides an estimated sequence signal. A noise bleacher filter having a frequency response of (1+ alpha D)/1- beta D2) receives a combined estimated sequence signal and data signal and provides a noise filtered signal. A matching and error event filter receives the noise filtered signal and provides an error event filtered signal. An error correction unit receives the estimated sequence signal from the maximum-likelihood detector and receives the error event filtered signal and provides an error corrected estimated sequence signal.
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Inventors:
Bush, gregory, es
Cidechan, Roy, Di
Coker, jonathan, di
Eles Seriu, Evangelos, Es
Galbraith, Richard, Elle
Stanek, David, Jay
Cidechan, Roy, Di
Coker, jonathan, di
Eles Seriu, Evangelos, Es
Galbraith, Richard, Elle
Stanek, David, Jay
Application Number:
JP2000568082A
Publication Date:
January 06, 2004
Filing Date:
August 31, 1999
Export Citation:
Assignee:
INTERNATIONAL BUSINESS MASCHINES CORPORATION
International Classes:
G06F11/10; G11B20/10; G11B20/18; G11B20/22; H03M13/00; G06F11/08; H03M13/39; H04L25/03; H04L25/497; (IPC1-7): G11B20/10; G06F11/08; G06F11/10; G11B20/18; H03M13/39
Domestic Patent References:
| JP1125602A | ||||
| JP76511A | ||||
| JP1097705A | ||||
| JP10512732A |
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)
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