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Title: Asymmetric iterative multi-track detection for 2-D non-binary LDPC-coded magnetic recording
Authors: Han, Guojun
Guan, Yong Liang
Cai, Kui
Chan, Kheong Sann
Keywords: Bit-patterned media recording (BPMR)
inter-track interference (ITI)
multi-track detection
non-binary low-density parity-check (NB-LDPC) codes.
DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2013
Source: Han, G., Guan, Y. L., Cai, K., & Chan, K. S. (2013). Asymmetric Iterative Multi-Track Detection for 2-D Non-Binary LDPC-Coded Magnetic Recording. IEEE Transactions on Magnetics, 49(10), 5215-5221.
Series/Report no.: IEEE transactions on magnetics
Abstract: Inter-track interference (ITI) is a major source of signal impairment in the next-generation magnetic recording systems. The single-track read channel model, combined with anti-ITI signal detection schemes, is a popular way to recover single-track data from a readback signal corrupted by the ITI. On the other hand, the multi-track read channel model can be used to simultaneously recover multi-track data from a readback signal. However, the performance of multi-track detection is severely degraded by the weak signals from the sidetracks and the indistinguishable symbols. To improve this performance, in this paper we propose a two-dimensional coding in conjunction with an asymmetric iterative multi-track detection (A-IMD) scheme, which uses joint channel detection and decoding of two parallel six-symbol-based detectors concatenated with two parallel non-binary low-density parity-check (NB-LDPC) decoder over GF(4), to iteratively recover four-track data from two readback signals. Simulation results demonstrate that the performance of the multi-track detection can indeed be greatly improved by using the proposed A-IMD scheme.
DOI: 10.1109/TMAG.2013.2262293
Rights: © 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
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