| Presentation | 2019-06-14 A study on neural network LLR modulation in TDMR 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) in two-dimensional magnetic recording (TDMR), and the proposed LLR modulator using neural network realizes effective iterative decoding in a read/write channel. In this report, we clarify that the performance improvement of iterative decoding can be obtained by considering LLRs of the adjacent track bits affecting to the decoding bit as the input of the neural network. Furthermore, we clarify that hybrid genetic algorithm (HGA) operations select LLRs by using the adjacent track LLRs affecting to the decoding bit and can update the connection weights of neural network for effective iterative decoding. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SMR / TDMR / LDPC / LLR / Neural network |
| Paper # | MRIS2019-8 |
| Date of Issue | 2019-06-06 (MRIS) |
| Conference Information | |
| Committee | MRIS / ITE-MMS |
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| Conference Date | 2019/6/13(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tohoku Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Recording Systems, etc. |
| Chair | Satoshi Matsunuma(Maxell) / Akihiko 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 neural network LLR modulation in TDMR |
| Sub Title (in English) | |
| Keyword(1) | SMR |
| Keyword(2) | TDMR |
| Keyword(3) | LDPC |
| Keyword(4) | LLR |
| Keyword(5) | 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(NIT) |
| 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 | 2019-06-14 |
| Paper # | MRIS2019-8 |
| Volume (vol) | vol.119 |
| Number (no) | MRIS-79 |
| Page | pp.pp.53-58(MRIS), |
| #Pages | 6 |
| Date of Issue | 2019-06-06 (MRIS) |