Noise minimization for magnetic data storage drives using oversa

Details Noise minimization for magnetic data storage drives using oversa Noise minimization for magnetic data storage drives using oversa

1992-09-10

1994-07-05

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

360 46, G11B 509

Patent

active

053272986

ABSTRACT:
A method and apparatus for minimizing the effects of non-stationary high-energy noise sources in magnetic data storage channel through the use of an oversampling and post-sampling filtering anti-aliasing procedure. The initial analog data is sampled at a rate sufficiently above the Nyquist rate to avoid aliasing. The high-frequency sampling stream is then digitally filtered to produce a lower-rate digital data stream having a reduced Nyquist rate introduced by the post-sampling digital filter. Because the anti-aliasing post-sampling filter is digital, no phase distortion is introduced in the readback data signal. Because the post-sampling digital filter lowers the Nyquist rate, late digital processing and decoding is accomplished without aliasing at a data rate below the initial Nyquist rate. High-energy noise pulses are preserved without smearing and can be simply removed by the usual error-correction method.

REFERENCES:
patent: 4689759 (1987-08-01), Anouar et al.
patent: 4707841 (1987-11-01), Yen et al.
patent: 4750055 (1988-06-01), Van Lier
patent: 4763207 (1988-08-01), Podolak et al.
patent: 4831464 (1989-05-01), Chijiwa
patent: 4837642 (1989-06-01), Smidth
patent: 4853797 (1989-08-01), Yamada et al.
patent: 4885646 (1989-12-01), Kanota et al.
patent: 4906928 (1990-03-01), Gard
patent: 4949177 (1990-08-01), Bannister et al.
patent: 4950999 (1990-08-01), Agnello et al.
patent: 5003559 (1991-03-01), Kanai et al.
patent: 5166955 (1992-11-01), Ohta
patent: 5220466 (1993-06-01), Coker et al.

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