发明名称 |
Magnetic recording/reproducing with added intersymbol interference to obtain a partial-response code |
摘要 |
A magnetic recording/reproducing uses a wide frequency band of a DC component to the next lowest spectral null frequency point and higher by using an existing recording/reproducing head and medium. Intersymbol interference is added to a magnetic recording channel so that an impulse response comes to a partial-response channel shown by polynomial 1-Dn (Dn is an n-bit signal delay); in which T is a Nyquist interval (reproduction-bit time interval), the values of (n>2) and T are selected by assuming equal frequency interval between the spectral null frequency points 1/nT, and thereby a symbol string having a Nyquist frequency equal to or higher than the second spectral null frequency point from the lowest frequency side excluding the vicinity of the DC component of the recording/reproducing characteristic is recorded or reproduced.
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申请公布号 |
US5539588(A) |
申请公布日期 |
1996.07.23 |
申请号 |
US19940189641 |
申请日期 |
1994.02.01 |
申请人 |
HITACHI, LTD. |
发明人 |
SAWAGUCHI, HIDEKI;SUZUKI, MIKIO;SUKEDA, HIROKO |
分类号 |
G11B5/09;G11B20/10;(IPC1-7):G11B5/09;G11B5/035 |
主分类号 |
G11B5/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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