发明授权
- 专利标题: PRML channel with EPR4 equalization and clocking
- 专利标题(中): PRML通道具有EPR4均衡和时钟
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申请号: US698637申请日: 1996-08-16
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公开(公告)号: US5857002A公开(公告)日: 1999-01-05
- 发明人: Constantin Michael Melas
- 申请人: Constantin Michael Melas
- 申请人地址: 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: NY Armonk
- 主分类号: H04L25/493
- IPC分类号: H04L25/493 ; H04L25/34 ; H04L25/49
摘要:
A method and apparatus for decoding a partial response encoded signal to generate a decoded signal. The first stage of the apparatus, a first delay filter, receives the partial response encoded signal and filters it with a delay characteristic of (1-D.sup.2)(1+D). The second stage, a timing system, generates a digital signal representative of the first filtered signal. The timing system includes an equalizer with an EPR4 equalization characteristic. The third stage, a second delay filter, filters the signal with a delay characteristic of 1-D. The final stage, a partial Viterbi decoder, generates the decoded signal.