Decision feedback viterbi detector for page-access optical memor

Details Decision feedback viterbi detector for page-access optical memor Decision feedback viterbi detector for page-access optical memor

1996-04-01

1998-04-14

Baker, Stephen M.

Excavating

365215, G11C 1304

Patent

active

057401845

ABSTRACT:
Signal processing methods for addressing intersymbol interference in page-access optical memories such as holographic or two photon systems are disclosed. The invention takes advantage of the cartesian arrangement of data in page-access optical memories. A detector using the Viterbi algorithm is used to decode data row by row. Decision feedback is used in the direction perpendicular to the Viterbi direction. The use of data from previously decoded rows allows a reduction in the complexity of the Viterbi detector.

REFERENCES:
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patent: 5430661 (1995-07-01), Fisher et al.
patent: 5543978 (1996-08-01), Park
patent: 5572503 (1996-11-01), Satoh et al.
Burkhardt, "Optimal Data Retrieval for High Density Storage", VLSI and Computer Peripherals, 1989 Proceedings, pp. I-43 to I-48, Dec. 1989.

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