Coefficient control system for digital equalizer using orthogona

Details Coefficient control system for digital equalizer using orthogona Coefficient control system for digital equalizer using orthogona

1992-01-27

1993-12-28

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 32, 333 18, 333 28R, 375 14, G11B 5035, G11B 509, H03G 1104, H03H 730

Patent

active

052745120

ABSTRACT:
An automatic equalizer for use with a recording and/or reproducing apparatus or with a communication transmission channel, wherein equalizer parameters are rendered variable and the degree of change of the error rate is extracted to set the parameters to optimum values based on the degree of change of the error rate. Output signal error rates are sequentially detected at a plurality of measurement points corresponding to preset plural characteristic parameters to find a minimum error rate measurement point. An initial parameter setting operation is performed for providing characteristic parameters for this measurement point to the equalizer as the initial parameter.

REFERENCES:
patent: 3715665 (1973-02-01), Chang
patent: 4590524 (1986-05-01), Okamoto et al.
patent: 4928287 (1990-05-01), Tanaka
Patent Abstracts of Japan, vol. 12, No. 456 (P-793) [3303] Nov. 30, 1988.
Publication IEEE Transactions on Magnetic, vo. Mag-23, No. 5 (Mita et al.) Sep., 1987.
IEEE Transactions on Communications, COM-33, No. 10 (Cohno et al.) Oct., 1985.
SMPTE Journal 96, No. 10, (Dare et al.) Oct., 1987.

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