Investigation of Graph-Based Detection in Iterative Decoding for Bit-Patterned Media Recording

Piya Kovintavewat

doi:10.4028/www.scientific.net/AMR.979.58

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 979Investigation of Graph-Based Detection in...

Investigation of Graph-Based Detection in Iterative Decoding for Bit-Patterned Media Recording

Abstract:

High-density bit-patterned media recording (BPMR) can be obtained by reducing the spacing between data bitislands in both the along-and across-track directions, thus leading to severe intersymbol interference (ISI) and intertrack interference (ITI) because of small bit and track pitches, respectively. Here, we propose to use the graph-based detector, instead of the trellis-based detector, in iterative decoding to combat the ISI and the ITI for a multi-head multi-track BPMR system. Specifically, the readback signal is sent to the graph-based detector before iteratively exchanging the soft information with a decoder. Experimental results indicate that at low to moderate complexity, the proposed scheme outperforms the existing schemes, especially at high recording density.

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Periodical:

Advanced Materials Research (Volume 979)

Pages:

58-61

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.979.58

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Online since:

June 2014

Authors:

Piya Kovintavewat*

Keywords:

Bit-Patterned Media Recording (BPMR), Graph-Based Detection, Iterative Decoding, Turbo Equalization

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