Two-Dimensional 8/9 Error Correcting Modulation Code

초록

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

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