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The rate 19/20 trellis code matched to enhanced extended class-4 partial response channel

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3 Author(s)
Saito, H. ; Dept. of Electr. & Electron. Eng., Ehime Univ., Matsuyama, Japan ; Okamoto, Y. ; Osawa, H.

In this paper, a rate 19/20 trellis code matched to the partial response (PR) channel is presented. Our trellis rode is designed on a multidimensional Euclidean space for which the minimum free Euclidean distance is larger than conventional recording codes. By using this trellis coding, a trellis coded partial response (TCPR) system is defined for the enhanced extended class-4 partial response (E2PR4) channel. Further, the decoding method for this TCPR system is based on the syndrome-former trellis decoding. The number of add-compare-selects (ACS's) in our system is fewer than that of conventional Viterbi decoding. The result shows that TCPR system employing this rate 19/20 trellis code with the constraint length 7 for the E2PR4 has an excellent performance compared with the conventional 8/9 maximum transition run (MTR) coding system in high-density recording

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Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 2 )