Abstract

A new form of modulation coding for page-oriented memories (POM’s) based on parity is introduced. The parity-based codes are evaluated by use of simulated POM data pages. It is illustrated that the proposed parity codes can outperform balanced modulation codes in the presence of fixed-pattern noise and additive white Gaussian noise.

© 1999 Optical Society of America

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References

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  1. D. Psaltis and F. Mok, Sci. Am. 273, 70 (1995).
    [CrossRef]
  2. J. H. Hong, I. McMichael, T. Y. Chang, W. Christian, and E. G. Paek, Opt. Eng. 34, 2193 (1995).
    [CrossRef]
  3. G. W. Burr, J. Ashley, H. Coufal, R. K. Grygier, J. A. Hoffnagle, C. M. Jefferson, and B. Marcus, Opt. Lett. 22, 639 (1997).
    [CrossRef] [PubMed]
  4. J. F. Heanue, M. C. Bashaw, and L. Hesselink, J. Opt. Soc. Am. A 12, 2432 (1996).
    [CrossRef]
  5. D. Brady and D. Psaltis, J. Opt. Soc. Am. A 9, 1167 (1992).
    [CrossRef]

1997 (1)

1996 (1)

1995 (2)

D. Psaltis and F. Mok, Sci. Am. 273, 70 (1995).
[CrossRef]

J. H. Hong, I. McMichael, T. Y. Chang, W. Christian, and E. G. Paek, Opt. Eng. 34, 2193 (1995).
[CrossRef]

1992 (1)

Ashley, J.

Bashaw, M. C.

Brady, D.

Burr, G. W.

Chang, T. Y.

J. H. Hong, I. McMichael, T. Y. Chang, W. Christian, and E. G. Paek, Opt. Eng. 34, 2193 (1995).
[CrossRef]

Christian, W.

J. H. Hong, I. McMichael, T. Y. Chang, W. Christian, and E. G. Paek, Opt. Eng. 34, 2193 (1995).
[CrossRef]

Coufal, H.

Grygier, R. K.

Heanue, J. F.

Hesselink, L.

Hoffnagle, J. A.

Hong, J. H.

J. H. Hong, I. McMichael, T. Y. Chang, W. Christian, and E. G. Paek, Opt. Eng. 34, 2193 (1995).
[CrossRef]

Jefferson, C. M.

Marcus, B.

McMichael, I.

J. H. Hong, I. McMichael, T. Y. Chang, W. Christian, and E. G. Paek, Opt. Eng. 34, 2193 (1995).
[CrossRef]

Mok, F.

D. Psaltis and F. Mok, Sci. Am. 273, 70 (1995).
[CrossRef]

Paek, E. G.

J. H. Hong, I. McMichael, T. Y. Chang, W. Christian, and E. G. Paek, Opt. Eng. 34, 2193 (1995).
[CrossRef]

Psaltis, D.

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Figures (3)

Fig. 1
Fig. 1

(a) Illustration of a user data block and a corresponding parity data block. (b) Sample FPN envelope for half a data page (128×64 pixels).

Fig. 2
Fig. 2

BER obtained with simulated data pages with no modulation coding (Raw) and with different modulation codes: a 6:8 balanced code, a 4:6 balanced code, a parity code (PC) with N=4, and a 2:4 balanced code.

Fig. 3
Fig. 3

Capacity improvement as a function of the target BER for different codes: a parity code (PC) with N=8 or N=10, a 6:8 balanced code, a 4:6 balanced code, and a 2:4 balanced code.

Equations (1)

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SNR=m1/σ1,

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