Read Channel with Turbo Decoding for Magneto-Optical Disks

概要

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Achieving high-density magneto-optical (MO) recording and a high transfer rate without degrading the signal-to-noise ratio (SNR) is not an easy task. Nonetheless, this is what we set out to do when we began developing a practical turbo decoding hardware description language (HDL) module for the MO read channel. To develop this module, we used a pipelined process to enable on-the-fly data reading, we optimized the system parameters, and we developed a time-sharing architecture to reduce the amount of required hardware. We tested the module using an HDL module simulator and an actual MO readout signal, and found that the SNR was improved by 3 dB compared to that required for partial response maximum likelihood (PRML) decoding.
2003-02-15