TY - JOUR
T1 - Soft-decision Viterbi decoding scheme and a new reliability metric for 4/6 modulation code in holographic data storage
AU - Kim, Yongok
AU - Kong, Gyuyeol
AU - Choi, Sooyong
PY - 2012/8
Y1 - 2012/8
N2 - A soft-decision Viterbi decoding for a 4/6 modulation code is proposed in a holographic data storage system. Since the previous proposed softdecision Viterbi decoding does not support a higher rate modulation codes than 1/2 rate modulation codes, we propose a new reliability metric to support the 4/6 modulation code. The reliability metric is used to calculate the branch metric on the trellis. For a better coding gain, we find a symbol mapping method for the modulation code which provides a large free distance on the trellis to have the enhanced error correcting capability. Simulation results show that the proposed scheme has about 2 dB coding gains than the conventional soft-decision Viterbi decoding scheme.
AB - A soft-decision Viterbi decoding for a 4/6 modulation code is proposed in a holographic data storage system. Since the previous proposed softdecision Viterbi decoding does not support a higher rate modulation codes than 1/2 rate modulation codes, we propose a new reliability metric to support the 4/6 modulation code. The reliability metric is used to calculate the branch metric on the trellis. For a better coding gain, we find a symbol mapping method for the modulation code which provides a large free distance on the trellis to have the enhanced error correcting capability. Simulation results show that the proposed scheme has about 2 dB coding gains than the conventional soft-decision Viterbi decoding scheme.
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U2 - 10.1143/JJAP.51.08JD09
DO - 10.1143/JJAP.51.08JD09
M3 - Article
AN - SCOPUS:84865228722
SN - 0021-4922
VL - 51
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 8 PART 3
M1 - 08JD09
ER -