| Presentation | 2015-05-22 Evaluation of Symmetric Mutual Information of Simplified TDMR Channel Model Tadashi Wadayama, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the present paper, a simplified two-dimensional magnetic recording (TDMR) channel model is proposed in order to capture the qualitative features of writing and read-back processes of TDMR systems. The proposed channel model incorporates the effects of both linear interference from adjacent bit-cells and signal-dependent noise due to irregular grain boundaries between adjacent bit-cells. The simplicity of the proposed model enables us to derive the closed form of the conditional PDF representing the probabilistic nature of the channel. The conditional PDF is Gaussian distributed and is parameterized by a signal-dependent covariance matrix. Based on this conditional PDF, a Monte Carlo method for approximating the symmetric mutual information of this channel is developed. The symmetric mutual information is closely related to the areal density limit for TDMR systems. The numerical results suggest that we may need low-rate coding, e.g., 2/3 or 1/2, when the jitter-like noise becomes dominant. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | magnetic recording / 2D-channel / symmetric mutual information |
| Paper # | IT2015-12,EMM2015-12 |
| Date of Issue | 2015-05-14 (IT, EMM) |
| Conference Information | |
| Committee | EMM / IT |
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| Conference Date | 2015/5/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kyoto International Community House |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Information Security, Information Theory, Information Hiding, etc. |
| Chair | Akinori Ito(Tohoku Univ.) / Yasutada Oohama(Univ. of Electro-Comm.) |
| Vice Chair | Masashi Unoki(JAIST) / Masaki Kawamura(Yamaguchi Univ.) / Tadashi Wadayama(Nagoya Inst. of Tech.) |
| Secretary | Masashi Unoki(Univ. of Electro-Comm.) / Masaki Kawamura(Nagasaki Univ.) / Tadashi Wadayama(Okayama Univ.) |
| Assistant | Motoi Iwata(Osaka Pref. Univ.) / Kazuhiro Kono(Kansai Univ.) / Ryo Nomura(Senshu Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Enriched MultiMedia / Technical Committee on Information Theory |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Evaluation of Symmetric Mutual Information of Simplified TDMR Channel Model |
| Sub Title (in English) | |
| Keyword(1) | magnetic recording |
| Keyword(2) | 2D-channel |
| Keyword(3) | symmetric mutual information |
| 1st Author's Name | Tadashi Wadayama |
| 1st Author's Affiliation | Nagoya Institute of Technology(Nitech) |
| Date | 2015-05-22 |
| Paper # | IT2015-12,EMM2015-12 |
| Volume (vol) | vol.115 |
| Number (no) | IT-37,EMM-38 |
| Page | pp.pp.63-68(IT), pp.63-68(EMM), |
| #Pages | 6 |
| Date of Issue | 2015-05-14 (IT, EMM) |