发明授权
US08964321B2 Iterative data storage read channel architecture having dropout mitigation
有权
迭代数据存储读通道结构,具有抑制功能
- 专利标题: Iterative data storage read channel architecture having dropout mitigation
- 专利标题(中): 迭代数据存储读通道结构,具有抑制功能
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申请号: US13907759申请日: 2013-05-31
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公开(公告)号: US08964321B2公开(公告)日: 2015-02-24
- 发明人: Roy D. Cideciyan , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
- 申请人: International Business Machines Corporation
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理机构: Zilka-Kotab, PC
- 主分类号: G11B27/36
- IPC分类号: G11B27/36 ; G11B20/10 ; G11B20/02
摘要:
According to one embodiment, a magnetic medium's readback signal samples are processed iteratively to provide dropout mitigation for a read channel by feeding the decoder output decisions back to the read channel front end where they are used to drive the decision-aided digital signal processing functions and control loops. Since data decisions provided by the decoder are typically more reliable than those provided by the detector, a significant performance improvement is obtained. A more reliable operation of the digital front-end signal processing functions in turn allows improvements to the reliability of the decoded data. Usage of Error Correcting Code (ECC) schemes that are soft decodable makes the read channel technique, described according to various embodiments herein, particularly efficient.
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