Signal detection method of data recording/reproducing apparatus

Details Signal detection method of data recording/reproducing apparatus Signal detection method of data recording/reproducing apparatus

1998-07-02

2000-12-19

Tran, Thang V.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

36912401, 36912405, 36912409, 360 51, G11B 700

Patent

active

061635170

ABSTRACT:
A signal detection device and method of a data recording/reproducing apparatus. The signal detection device of a data recording/reproducing apparatus for recording/reproducing a digital signal U.sub.k having an arbitrary integer time k as an index, includes: an analog-to-digital converter (ADC) for converting an analog signal from which external band noise is removed after being reproduced from the data recording/reproducing apparatus, into a digital signal; a filter for modifying the digital signal converted by the analog-to-digital converter (ADC) into a signal having a predetermined spectral shape; and a Viterbi detector for detecting the spectrum signal modified by the filter as the data recorded in the data recording/reproducing apparatus. Therefore, after equalizing a signal into a spectrum expressed by 2+D+D.sup.2 +D.sup.3, which is similar to the spectrum of an optical recording/reproducing apparatus, the maximum likelihood (ML) is detected by the Viterbi detector. Accordingly, noise scarcely increases and loss by intersymbol interference is overcome, so that the signal can be detected with reliability.

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patent: 5886842 (1999-03-01), Ziperovich
patent: 5949831 (1999-09-01), Coker et al.

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