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Multitrack Recording and Two-stage Decoding Schemes for Heated Dot Magnetic Recording with Double-layered Bit Patterned Media

2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers), 2023
In previous work, a two-stage signal processing scheme for a heated-dot magnetic recording (HDMR) system using double-layered bit-patterned media (BPM) was proposed [1].
H. Saito
semanticscholar   +1 more source

MFM analysis of recorded bit patterns of perpendicular media

Journal of Magnetism and Magnetic Materials, 2001
Abstract Read/write characteristics of a perpendicular double-layered medium with various thicknesses of soft magnetic layer δsoft using a ring head were investigated by analyzing the MFM image of the recorded bit pattern and reproduced waveform. It was found that the recording bits were written by the field of the head gap for the medium with δsoft ...
Mayumi Kitano   +9 more
openaire   +1 more source

The potential of bit patterned media in shingled recording

Journal of Magnetism and Magnetic Materials, 2012
Abstract Shingled recording on continuous and bit patterned media (BPM) is compared. From a recording viewpoint, continuous media have the advantage due to the lack of a need to synchronise writing with dot position. For BPM the write windows at 4 Tbit/in 2 are only a couple of nm across, requiring extremely tight manufacturing tolerances.
S.J. Greaves, H. Muraoka, Y. Kanai
openaire   +1 more source

Track Misregistration Estimation Technique Based on Hybrid K-Means and EM Algorithm in Bit-Patterned Media Recording Systems

IEEE transactions on magnetics
Track misregistration (TMR) in ultrahigh density bit-patterned media recording (BPMR) is a significant issue, severely degrading system performance. Although TMR can be managed by a servo control loop, this article proposes a hybrid TMR mitigation method
P. Kochcha, K. Kankhunthod, C. Warisarn
semanticscholar   +1 more source

Modeling for write synchronization in bit patterned media recording

Journal of Applied Physics, 2012
Bit patterned media recording (BPMR) is a contender for next generation technology after conventional granular magnetic recording (CGMR) can no longer sustain the continued areal density growth. BPMR has several technological hurdles that need to be overcome, among them is solving the problem of write synchronization.
Maria Yu Lin   +5 more
openaire   +1 more source

Using Long Short-Term Memory to Estimate the 2-D Interference of Bit-Patterned Media Recording Systems

IEEE transactions on magnetics
To increase the areal density (AD) of data storage systems, the bit-patterned media recording (BPMR) is considered a promising candidate for next-generation data storage systems. In BPMR, magnetic islands are used to store the user data. Therefore, these
T. Nguyen, Jaejin Lee
semanticscholar   +1 more source

9/12 Two-dimensional modulation code for bit-patterned media recording

2016 Asia-Pacific Magnetic Recording Conference Digest (APMRC), 2016
This paper presents a 9/12 two-dimensional (2D) modulation code as a way to overcome 2D intersymbol interference (ISI) in bit-patterned media recording (BPMR) systems. BPMR systems are regarded as one of the promising candidates for the attainment of areal density increases that are beyond the capacities of conventional storage systems.
Chi Dinh Nguyen, Jaejin Lee
openaire   +1 more source

Graph Neural Network (GNN) for Joint Detection–Decoder MAP–LDPC in Bit-Patterned Media Recording Systems

Electronics
With its high area density, bit-patterned media recording (BPMR) is emerging as a leading technology for next-generation storage systems. However, as area density increases, magnetic islands are positioned closer together, causing significant two ...
T. Nguyen, Jaejin Lee
semanticscholar   +1 more source

Simple Soft-Information Developers Based on Parallel Detection Scheme in Bit-Patterned Media Recording (BPMR) Systems

2021 36th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC), 2021
Among the alternate ultra-high density data storage technologies, bit-patterned media recording (BPMR) is one of the mentioned technologies that was proposed to achieve a higher density.
M. Mattayakan, S. Sokjabok, C. Warisam
semanticscholar   +1 more source

Optimization of LDPC codes for bit-patterned media recording with media noise

2016 16th International Symposium on Communications and Information Technologies (ISCIT), 2016
Challenges in bit-pattered magnetic recording (BPMR) include two-dimensional (2D) inter-symbol interference (ISI) constituted by both one-dimensional ISI and inter-track interference (ITI), and media noise arising from island position jitter (PJ) and island size fluctuations (SF) in both the down-track and cross-track directions.
Lingjun Kong   +3 more
openaire   +1 more source

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