Two-dimensional low-pass filtering codes

Ashley, Jonathan; Marcus, Brian

doi:10.1109/26.681399

Cited by 48 publications

(36 citation statements)

References 8 publications

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“…HDS contributes a high storage capacity and transfer rate to holographic data storage systems. Although HDS has these two strengths, it also has some weaknesses that need to be addressed and solved, such as intersymbol interference (ISI), interpage interference (IPI), and misalignment [4,5] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…To mitigate the 2D ISI problem, many researchers have conducted studies on 2D modulation codes [5][6][7][8][9][10][11] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…One scheme is to remove the source of the 2D ISI, such as the isolated ON or OFF pixel patterns [5,6] . The modulation code prohibits the patterns of high spatial frequency.…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…The modulation code prohibits the patterns of high spatial frequency. A series of factors, such as the finite extent of the medium, the shape of the beams, the imperfections in the optics, and the use of a phase mask, tend to truncate or distort high spatial frequencies in the HDS system [5] . Another scheme is to furnish the modulation codes with an error correcting capability [8][9][10][11] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

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Two-Dimensional 8/9 Error Correcting Modulation Code

Lee¹,

Kim²,

Lee³

2014

The Journal of Korean Institute of Communications and Informati

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BSTRACTIn holographic data storage (HDS), a high transmission rate is accomplished through the use of a charge coupled device array for reading two-dimensional (2D) pixel image data. Although HDS has many advantages in terms of storage capacity and data transmission rates, it also features problems, such as 2D intersymbol interference (ISI) by neighboring pixels and interpage interference (IPI) by multiple images stored in the same holographic volume. Modulation codes can be used to remove these problems. We introduce a 2D 8/9 error-correcting modulation code. The proposed modulation code exploits the trellis-coded modulation scheme, and the code rate is larger (about 0.889) than that of the conventional 6/8 balanced modulation code (an increase of approximately 13.9%). The performance of the bit error rate (BER) with the proposed scheme was improved compared with that of the 6/8 balanced modulation code and the simple 8/9 code without the trellis scheme.

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Section: ⅰ Introductionmentioning

confidence: 99%

“…To mitigate the 2D ISI problem, many researchers have conducted studies on 2D modulation codes [5][6][7][8][9][10][11] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…One scheme is to remove the source of the 2D ISI, such as the isolated ON or OFF pixel patterns [5,6] . The modulation code prohibits the patterns of high spatial frequency.…”

Section: ⅰ Introductionmentioning

confidence: 99%

Section: ⅰ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-Dimensional 8/9 Error Correcting Modulation Code

Lee¹,

Kim²,

Lee³

2014

The Journal of Korean Institute of Communications and Informati

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“…Also, by using holographic technology, many pages can be stored in the same volume. Even though HDS shows better capacity and transmission rates compared to other data storages, it has a number of problems, including 2D intersymbol interference (ISI), interpage interference (IPI), and misalignment [4][5] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

Error-Correcting 7/9 Modulation Codes For Holographic Data Storage

Lee¹,

Kim²,

Lee³

2014

The Journal of Korean Institute of Communications and Informati

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bstractHolographic data storage (HDS) has a number of advantages, including a high transmission rate through the use of a charge coupled device array for reading two-dimensional (2D) pixel image data, and a high density capacity. HDS also has disadvantages, including 2d intersymbol interference by neighboring pixels and interpage interference by multiple pages stored in the same holographic volume. These problems can be eliminated by modulation codes. We propose a 7/9 error-correcting modulation code that exploits a Viterbi-trellis algorithm and has a code rate larger (about 0.778) than that of the conventional 6/8 balanced modulation code. We show improved performance of the bit error rate with the proposed scheme compared to that of the simple 7/9 code without the trellis scheme and the 6/8 balanced modulation code.

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Constrained Coding Techniques for Data Storage

Coene

Hollmann

2003

Wiley Encyclopedia of Telecommunications

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Modulation codes such as runlength‐limited codes have been widely employed in magnetic and optical data storage systems. We review the main techniques involved in the design and use of these codes: the maximal code rate or capacity, graphical presentations of constraints, encoders and decoders, and code construction methods such as the ACH state‐splitting algorithm. We conclude this survey by discussing some recent developments and research trends.

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Two-dimensional low-pass filtering codes

Cited by 48 publications

References 8 publications

Two-Dimensional 8/9 Error Correcting Modulation Code

Two-Dimensional 8/9 Error Correcting Modulation Code

Error-Correcting 7/9 Modulation Codes For Holographic Data Storage

Constrained Coding Techniques for Data Storage

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