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Two-Dimensional 8/9 Error Correcting Modulation Code
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 Title & Authors
Two-Dimensional 8/9 Error Correcting Modulation Code
Lee, Kyoungoh; Kim, Byungsun; Lee, Jaejin;
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 Abstract
In 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.
 Keywords
Holographic data storage;Two-dimensional intersymbol interference;Modulation code;
 Language
English
 Cited by
 References
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