| Presentation | 2019-12-05 A study on iterative decoding using information of magnetic transitions in SMR Madoka Nishikawa, Yasuaki Nakamura, Yasushi Kanai, Hisashi Osawa, Yoshihiro Okamoto, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In our previous research, we focused on a log-likelihood ratio (LLR) computed as the decoding reliability by a posteriori probability (APP) decoder on the low-density parity-check (LDPC) coding and iterative decoding system by a signal processing for the shingled magnetic recording (SMR), and we clarified that applying the LLR modulator with a neural network realizes an effective iterative decoding. In this report, we propose a new LLR modulator with a neural network using information of magnetic transitions correlated with LLRs. Then, we clarify that the proposed LLR modulator with a neural network corresponds to effect of continuous magnetic reversal, and realizes more effective iterative decoding. Furthermore, we also clarify that the system with the proposed LLR modulator achieves about 1.0 dB and 0.5 dB improvement compared to the system without LLR modulator and the system with the conventional LLR modulator, respectively in required signal-to-noise ratio (SNR) to achieve no-errors. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SMR / LDPC / LLR / Neural network |
| Paper # | MRIS2019-39 |
| Date of Issue | 2019-11-28 (MRIS) |
| Conference Information | |
| Committee | MRIS / ITE-MMS |
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| Conference Date | 2019/12/5(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Ehime University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Signal Processing and Others |
| Chair | Satoshi Matsunuma(Maxell) / Norihiko Ishii(NHK) |
| Vice Chair | |
| Secretary | (Toshiba) / (Kinki Univ.) |
| Assistant | Ikuya Tagawa(Tohoku Inst. of Tech.) / Hiroko Arai(AIST) |
| Paper Information | |
| Registration To | Technical Committee on Magnetic Recording & Information Storage / Technical Group on Multi-media Storage |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study on iterative decoding using information of magnetic transitions in SMR |
| Sub Title (in English) | |
| Keyword(1) | SMR |
| Keyword(2) | LDPC |
| Keyword(3) | LLR |
| Keyword(4) | Neural network |
| 1st Author's Name | Madoka Nishikawa |
| 1st Author's Affiliation | Ehime University(Ehime Univ.) |
| 2nd Author's Name | Yasuaki Nakamura |
| 2nd Author's Affiliation | Ehime University(Ehime Univ.) |
| 3rd Author's Name | Yasushi Kanai |
| 3rd Author's Affiliation | Niigata Institute of Technology(NIIT) |
| 4th Author's Name | Hisashi Osawa |
| 4th Author's Affiliation | Ehime University(Ehime Univ.) |
| 5th Author's Name | Yoshihiro Okamoto |
| 5th Author's Affiliation | Ehime University(Ehime Univ.) |
| Date | 2019-12-05 |
| Paper # | MRIS2019-39 |
| Volume (vol) | vol.119 |
| Number (no) | MRIS-326 |
| Page | pp.pp.1-6(MRIS), |
| #Pages | 6 |
| Date of Issue | 2019-11-28 (MRIS) |