Presentation 2019-12-05
A study on MAMR R/W channel modeling for signal processing
Yuji Yamada, Yasuaki Nakamura, Madoka Nishikawa, Yasushi Kanai, Yoshihiro Okamoto,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Microwave assisted magnetic recording (MAMR) draws attention as a recording technology to increase the recording densities in a hard disk drive (HDD), and development of signal processing systems suitable for MAMR has been required. In this report, in order to develop the suitable signal processing system for MAMR, we construct a read/write (R/W) model of MAMR using the discrete granular medium model, the magnetic field of recording head, and the effect of spin-torque oscillator (STO) obtained by micromagnetic simulation. Then, we evaluate the recorded condition by the medium magnetization and bit reliability. Furthermore, we evaluate the bit error rate (BER) performance of the low-density parity-check (LDPC) coding and iterative decoding as a signal processing system for the shingled magnetic recording (SMR) using the constructed MAMR R/W channel model. The results clarify that assisting by the STO improves the magnetization conditions so as to be close to the recording information, and it improves about 1.3 dB of the required signal-to-noise ratio (SNR) to achieve no-errors.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) MAMR / Read/Write channel / LDPC coding and iterative decoding system
Paper # MRIS2019-40
Date of Issue 2019-11-28 (MRIS)

Conference Information
Committee MRIS / ITE-MMS
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
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A study on MAMR R/W channel modeling for signal processing
Sub Title (in English)
Keyword(1) MAMR
Keyword(2) Read/Write channel
Keyword(3) LDPC coding and iterative decoding system
1st Author's Name Yuji Yamada
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 Madoka Nishikawa
3rd Author's Affiliation Ehime University(Ehime Univ.)
4th Author's Name Yasushi Kanai
4th Author's Affiliation Niigata Institute of Technology(Niigata Institute of Technology)
5th Author's Name Yoshihiro Okamoto
5th Author's Affiliation Ehime University(Ehime Univ.)
Date 2019-12-05
Paper # MRIS2019-40
Volume (vol) vol.119
Number (no) MRIS-326
Page pp.pp.7-12(MRIS),
#Pages 6
Date of Issue 2019-11-28 (MRIS)